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Anna University
1.
Akilamudhan P.
Hydrodynamic studies on three-phase internal loop and
combined loop airlift fluidized beds.
Degree: Chemical Engineering, 2013, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/9947
► Many industrial reactions require simultaneous contact of gasliquid or gas-liquid-solid phases. These reactions are carried out in multiphase reactors. These industrial multi-phase reactors are mainly…
(more)
▼ Many industrial reactions require simultaneous
contact of gasliquid or gas-liquid-solid phases. These reactions
are carried out in multiphase reactors. These industrial
multi-phase reactors are mainly classified into stirred tank
reactors and column reactors. From the literature, it is observed
that a large variety of configurations of internal loop airlift
fluidized bed reactors have been investigated by various authors.
The literature survey clearly shows that almost all the works have
been carried out by using air-water systems or other stagnant
Newtonian liquid systems. Since the bioprocess fluids possess
non-Newtonian behavior, there is a need to study the hydrodynamics
characteristics such as gas holdup, liquid holdup and minimum
fluidization velocity in internal loop airlift fluidized bed and
combined loop airlift fluidized bed using Newtonian and the
non-Newtonian liquids for a wide range of fundamental and operating
variables. Hence in this present study, experiments have been
carried out to analyse the influence of superficial liquid and
gaseous phase velocities, size and shape of particles and physical
properties of the liquid on the above mentioned hydrodynamic
parameters. Based on the experimental results separate unified
dimensionless correlations were developed to predict the gas
holdup, liquid holdup and minimum fluidization velocity which can
be used to design and scale up of internal loop airlift fluidized
bed and combined loop airlift fluidized bed for Newtonian and
non-Newtonian liquids with the continuous flow. The predicted
correlations for the gas holdup, liquid holdup and minimum
fluidization velocity for the internal loop airlift fluidized bed
and combined loop airlift fluidized bed were found to be
satisfactory for both the Newtonian and non-Newtonian systems with
a wide range of fundamental and operating variables covered in the
present study.
Appendices p. 114 - 257, References p.
258-263
Advisors/Committee Members: Sivakumar V.
Subjects/Keywords: Hydrodynamic
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
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APA (6th Edition):
P, A. (2013). Hydrodynamic studies on three-phase internal loop and
combined loop airlift fluidized beds. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9947
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
P, Akilamudhan. “Hydrodynamic studies on three-phase internal loop and
combined loop airlift fluidized beds.” 2013. Thesis, Anna University. Accessed April 19, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/9947.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
P, Akilamudhan. “Hydrodynamic studies on three-phase internal loop and
combined loop airlift fluidized beds.” 2013. Web. 19 Apr 2021.
Vancouver:
P A. Hydrodynamic studies on three-phase internal loop and
combined loop airlift fluidized beds. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Apr 19].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9947.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
P A. Hydrodynamic studies on three-phase internal loop and
combined loop airlift fluidized beds. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9947
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Qian, Bian.
Two Problems in Viscous Flow: Fluid-Structure Interaction
and Contact Drop Formation.
Degree: PhD, Fluids, Thermal, and Chemical Processing, 2010, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:11130/
► This thesis deals with two problems in viscous flow.In the first part, fluid-structure interactions were investigated, with connections to swimming microorganisms. Motivated by a numerically…
(more)
▼ This thesis deals with two problems in viscous flow.In
the first part, fluid-structure interactions were investigated,
with connections to swimming microorganisms. Motivated by a
numerically proposed swimming mechanism, we studied an elastic
straight rod rotating on an imaginary cone. The shapes of the rod
which rotates at either prescribed torques or speeds were
experimentally measured and theoretically calculated. The rod
undergoes a discontinuous transition to a helical shape at a
critical torque, with increased propulsion force. A simple model
was presented to capture and explain the essential physics. In
addition, the longstanding hypothesis of
hydrodynamic
synchronization was investigated using a scale model experiment. We
demonstrated that
hydrodynamic interactions can cause
synchronization between rotating paddles driven at constant torque
if the shafts supporting the paddles have some flexibility. The
synchronization state depends on the symmetry of the paddles and
the torque mismatch. Excellent agreements were shown between the
experiments and the regularized stokeslets simulations. And a
simple analytic theory was built to predict the synchronization
time as a function of paddle separation.In the second part, contact
drop formation on a hydrophobic surface was examined experimentally
and theoretically. A wide range of droplet sizes can result from
the same syringe by varying the dispensing speed. Three dispensing
regimes were identified according to the motion of the contact
line, a line coexisting between liquid/vapor/solid interfaces. In
the fixed and the expanding contact-line regimes, a power
dependence of the drop sizes on the dispensing speeds was observed
experimentally and obtained theoretically. In the receding
contact-line regime, the contact-line motion consists of two
stages: a slow retraction at the beginning and a rapid retraction
immediately prior to drop breakup. The dispensing process was
modeled as a stretching liquid bridge with a free moving
contact-line. A quasi-static analysis and numerical calculations
were performed to accurately predict the initial evolution of the
liquid bridge and the final breakup respectively. The influences of
the contact-line movement on the onset instabilities of liquid
bridges and thus the deposited drop sizes were
discussed.
Advisors/Committee Members: Breuer, Kenneth (Director), Powers, Thomas (Reader), Maxey, Martin (Reader), Tripathi, Anubhav (Reader).
Subjects/Keywords: hydrodynamic synchronization
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Qian, B. (2010). Two Problems in Viscous Flow: Fluid-Structure Interaction
and Contact Drop Formation. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:11130/
Chicago Manual of Style (16th Edition):
Qian, Bian. “Two Problems in Viscous Flow: Fluid-Structure Interaction
and Contact Drop Formation.” 2010. Doctoral Dissertation, Brown University. Accessed April 19, 2021.
https://repository.library.brown.edu/studio/item/bdr:11130/.
MLA Handbook (7th Edition):
Qian, Bian. “Two Problems in Viscous Flow: Fluid-Structure Interaction
and Contact Drop Formation.” 2010. Web. 19 Apr 2021.
Vancouver:
Qian B. Two Problems in Viscous Flow: Fluid-Structure Interaction
and Contact Drop Formation. [Internet] [Doctoral dissertation]. Brown University; 2010. [cited 2021 Apr 19].
Available from: https://repository.library.brown.edu/studio/item/bdr:11130/.
Council of Science Editors:
Qian B. Two Problems in Viscous Flow: Fluid-Structure Interaction
and Contact Drop Formation. [Doctoral Dissertation]. Brown University; 2010. Available from: https://repository.library.brown.edu/studio/item/bdr:11130/

University of Hawaii – Manoa
3.
Nolte, Jerica Dawn.
In-ocean experiments of a wave energy conversion device with a drogue and wave power calculations.
Degree: 2016, University of Hawaii – Manoa
URL: http://hdl.handle.net/10125/100629
► M.S. University of Hawaii at Manoa 2013.
This research describes the experimental and numerical modeling of a heaving point source wave energy conversion (WEC) device…
(more)
▼ M.S. University of Hawaii at Manoa 2013.
This research describes the experimental and numerical modeling of a heaving point source wave energy conversion (WEC) device developed by Trex Enterprises of Maui and tested by the University of Hawaii at Manoa. The principle of operation of the WEC device is to convert the vertical heave displacement into a rotational action, which generates electrical power. The heave displacement is created by the WEC system riding incoming waves relative to an anchoring system. Two deployment cases of the single WEC device were ocean tested with the goal of collecting power data based on the type of the anchoring method. The anchoring methods are referred to as the single-body case (moored system) and double-body case (drogue anchored system). The experiments were carried out on the South shore of Oahu during the summer of 2012. The WEC system was equipped with sensors to measure and record the heave displacements of the WEC system, the generated power output, and the surface elevation. The real time experimental data were collected and analyzed to determine the power generation profile, the WEC system's heave displacements, surface elevation, and heave response amplitude operator (RAO) for both cases. A numerical modeling program was built to perform hydrodynamic analysis in the time domain in irregular seas for the single-body or double-body case. The program solves for the individual body motion. It is used to predict the WEC device's power production over the time series.
Subjects/Keywords: hydrodynamic analysis
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nolte, J. D. (2016). In-ocean experiments of a wave energy conversion device with a drogue and wave power calculations. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/100629
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nolte, Jerica Dawn. “In-ocean experiments of a wave energy conversion device with a drogue and wave power calculations.” 2016. Thesis, University of Hawaii – Manoa. Accessed April 19, 2021.
http://hdl.handle.net/10125/100629.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nolte, Jerica Dawn. “In-ocean experiments of a wave energy conversion device with a drogue and wave power calculations.” 2016. Web. 19 Apr 2021.
Vancouver:
Nolte JD. In-ocean experiments of a wave energy conversion device with a drogue and wave power calculations. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/10125/100629.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nolte JD. In-ocean experiments of a wave energy conversion device with a drogue and wave power calculations. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/100629
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University
4.
Prabu T.
Hydrodynamic design of a Centrifugal pump
impeller;.
Degree: Hydrodynamic design of a Centrifugal pump
impeller, 2015, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/43133
► The world of fluid machinery is vast and widespread having its newlinewings in all aspects of life From agriculture to air conditioning fluid newlinemachinery play…
(more)
▼ The world of fluid machinery is vast and widespread
having its newlinewings in all aspects of life From agriculture to
air conditioning fluid newlinemachinery play an important role A
pump is a machine that expends newlinemechanical energy to increase
the pressure of a fluid and to move it from a newlineregion of low
pressure to one of high pressure by creating pressure difference
newlinebetween the suction side and delivery side Little
information is known about newlinethe complex flow phenomenon
taking place inside it but its performance can newlinebe improved
by optimizing various design parameters to produce a
newlinestreamlined flow Conventionally many aspects of the design
of an impeller newlineare based on empirical formulae derived from
experience and thumb rules newlineTherefore studying these
parameters mathematically will serve the purpose of
newlineincreasing the efficiency and also establishing a standard
methodology for newlinedesigning the impeller newlineThe main
objective of the present work is to improve the newlineperformance
of a centrifugal pump with improved design of its impeller by
newlineanalyzing and optimizing the design parameters like vane
profile inlet and newlineoutlet vane angles number of vanes and
overall dimensions These newlineparameters are determined by
inverse design technique and optimized using newlinepattern search
algorithm newlineThe flow pattern inside the impeller vane passage
significantly newlineinfluences the overall performance of the pump
If the flow pattern is newlinestreamlined lesser will be the losses
and higher the head obtained at the outlet newline
newline
appendix p146-148, reference
p149-154.
Advisors/Committee Members: Rudramoorthy R.
Subjects/Keywords: Centrifugal pump impeller; Hydrodynamic
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
T, P. (2015). Hydrodynamic design of a Centrifugal pump
impeller;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/43133
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
T, Prabu. “Hydrodynamic design of a Centrifugal pump
impeller;.” 2015. Thesis, Anna University. Accessed April 19, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/43133.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
T, Prabu. “Hydrodynamic design of a Centrifugal pump
impeller;.” 2015. Web. 19 Apr 2021.
Vancouver:
T P. Hydrodynamic design of a Centrifugal pump
impeller;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Apr 19].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/43133.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
T P. Hydrodynamic design of a Centrifugal pump
impeller;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/43133
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of the Western Cape
5.
Rafieferantsoa, Mika Harisetry.
Neutral hydrogen in galaxies, its content and the effect of environment on its evolution
.
Degree: 2018, University of the Western Cape
URL: http://hdl.handle.net/11394/6581
► Using two hydrodynamic galaxy formation simulations from the Mufasa project that I helped develop, we aim to better understand the relationship between galaxy evolution and…
(more)
▼ Using two
hydrodynamic galaxy formation simulations from the Mufasa project that I helped
develop, we aim to better understand the relationship between galaxy evolution and its cold gas
content commonly known as the neutral hydrogen or Hi. We first look at the environmental
properties of the simulated galaxies and compare to those that are available observationally. As
a proxy, we specifically quantify the so-called galactic conf ormity, which is the concordance
between the properties of galaxies neighbouring the primaries, in chapter 2. We show that the
Hi, the specific star formation rate (sSFR) and the colour of galaxies show galactic conformity
in qualitative agreement with previous observed data, i.e. the Hi-rich primary galaxies are surrounded
by Hi-richer galaxies than the Hi-poor primary galaxies, and similarly for the sSFR
and the colour. We find that environment, quantified by the number of neigbouring galaxies
within a fixed aperture, stellar age and molecular hydrogen (H2) also show conformity. Galactic
conformity also depends on the dark matter halo mass of the primary galaxy. The galactic
conformity signal from the primaries of smaller haloes is weak but extends out to several virial
radii of those structures, whereas the signal is very strong for high mass haloes but lowers
quickly with distances from the primaries. We also find the galactic conformity only emerges
in the later half of cosmic evolution. We next quantify the gas content and star formation
depletion timescales in chapter 3. We use two carefully chosen groups of simulated galaxies
and find that timescales are affected by both the mass of the virialised structure of the first
infall and the galaxy stellar mass at infall: the higher the halo mass or the stellar mass the
shorter the timescale. The gas or Hi depletion timescale is concordant to that of the star formation
quenching, indicative of direct decrease of SFR due to depletion of the extended cold
gas reservoir. The neutral atomic or molecular hydrogen consumption timescale depends on
the Hubble time. Galaxies tend to form stars more efficiently at lower redshift. While the halo
mass of infall affects the consumption timescale of the Hi, it does not correlate with the H2. We
lastly develop machine learning tools to use galaxy photometric data to predict a galaxy’s Hi
mass in chapter 4, to allow predictions for Hi from much larger optical photometric surveys.
The training and testing of the algorithms are done first with the simulated data from Mufasa.
We show that our model performs better than previously done with ad hoc data fitting
approaches. Random Forest (RF) followed by the Deep Neural Networks (DNN) perform best
among the explored machine learning techniques. Extending the trained models to observed
data, namely the Arecibo Legacy Fast ALFA (ALFALFA) and REsolved Spectroscopy Of a Local
VolumE (RESOLVE) survey data, we show the overall performance is slightly reduced relative
to the simulated testing set owing to the small inconsistency between…
Advisors/Committee Members: Dave, Romeel (advisor).
Subjects/Keywords: Hydrodynamic;
Galaxy;
Evolution;
Qualitative;
Hydrogen
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rafieferantsoa, M. H. (2018). Neutral hydrogen in galaxies, its content and the effect of environment on its evolution
. (Thesis). University of the Western Cape. Retrieved from http://hdl.handle.net/11394/6581
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rafieferantsoa, Mika Harisetry. “Neutral hydrogen in galaxies, its content and the effect of environment on its evolution
.” 2018. Thesis, University of the Western Cape. Accessed April 19, 2021.
http://hdl.handle.net/11394/6581.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rafieferantsoa, Mika Harisetry. “Neutral hydrogen in galaxies, its content and the effect of environment on its evolution
.” 2018. Web. 19 Apr 2021.
Vancouver:
Rafieferantsoa MH. Neutral hydrogen in galaxies, its content and the effect of environment on its evolution
. [Internet] [Thesis]. University of the Western Cape; 2018. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/11394/6581.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rafieferantsoa MH. Neutral hydrogen in galaxies, its content and the effect of environment on its evolution
. [Thesis]. University of the Western Cape; 2018. Available from: http://hdl.handle.net/11394/6581
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waikato
6.
Robinson, Benjamin Joseph.
Hydrodynamic impacts of tectonics in prehistoric Ohiwa Harbour, North Island, New Zealand
.
Degree: 2012, University of Waikato
URL: http://hdl.handle.net/10289/6478
► Ohiwa Harbour is an estuarine lagoon located in the eastern Bay of Plenty, North Island, New Zealand. Ohiwa Harbour is bounded by two sand spits,…
(more)
▼ Ohiwa Harbour is an estuarine lagoon located in the eastern Bay of Plenty, North Island, New Zealand. Ohiwa Harbour is bounded by two sand spits, Ohope and Ohiwa Spits.
This study assessed the likelihood of a resistant barrier underlying Ohiwa Spit, which would control the inlet and spit locations. The observed depths of layers unable to be penetrated by a vibrocorer on Ohiwa Spit supported this idea, along with the discovery of a rock outcrop on the eastern harbour entrance using sidescan SONAR.
Vibrocoring on Ohiwa Spit added to the knowledge of the prehistoric evolution of Ohiwa Harbour, and an attempt to infer various subsidence events on Ohiwa Spit were made. Fining upwards coarse sand sequences with dominant shell material were found in the cores. These sequences could be related to a change in harbour hydrodynamics, or recent subsidence events in Ohiwa Harbour, such as the 0.6m subsidence of the Waimana Fault 636 to 575cal yrs BP. A sharp change in the core profile was observed at 1.4m in core C and 1.7m in core C2, marked by increased grain size and an abundance of shell material, mostly Austrovenus stutchburyi. This could be related to a change in wave energy in the harbour or an erosional contact associated with subsidence of Ohiwa Spit. Comparison of radiocarbon dated shells in this study with Murdoch (2005) on Ohope Spit suggests that more subsidence has occurred at Ohiwa Spit than Ohope Spit; this may be associated with a fault through the harbour entrance.
Subsidence associated with earthquakes, and erosion associated with at least four tsunami events in the last 6000 years has increased the depth and extent of Ohiwa Harbour, increasing its volume. This study used numerical modeling to determine the
hydrodynamic impacts of past catastrophic events (earthquake related subsidence and volcanic eruptions) on Ohiwa Harbour. Ten scenarios along with present conditions were modelled.
• In scenarios where sea level was modified only (scenarios 1-5 and 8), tidal range and surface elevation increased within the harbour, but not at the harbour entrance. The entrance hydrodynamics were also influenced by its width; as Ohope Spit accreted, the surface elevation and flow velocities increased within the tidal inlet
• Flow speeds increased at the harbour entrance by up to 50% following subsidence in scenarios 9 and 10
• A drop in sea level during subsidence (scenario 6) resulted in a smaller tidal prism and hence reduced flow velocities at the inlet, despite the subsidence
• Scenario 7 involved subsidence and the breaching of Ohope Spit, which would divert flow away from the entrance and result in reduced flow velocities at the entrance
Advisors/Committee Members: de Lange, Willem P (advisor).
Subjects/Keywords: Hydrodynamic;
Ohiwa Harbour;
Subsidence;
Modelling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Robinson, B. J. (2012). Hydrodynamic impacts of tectonics in prehistoric Ohiwa Harbour, North Island, New Zealand
. (Masters Thesis). University of Waikato. Retrieved from http://hdl.handle.net/10289/6478
Chicago Manual of Style (16th Edition):
Robinson, Benjamin Joseph. “Hydrodynamic impacts of tectonics in prehistoric Ohiwa Harbour, North Island, New Zealand
.” 2012. Masters Thesis, University of Waikato. Accessed April 19, 2021.
http://hdl.handle.net/10289/6478.
MLA Handbook (7th Edition):
Robinson, Benjamin Joseph. “Hydrodynamic impacts of tectonics in prehistoric Ohiwa Harbour, North Island, New Zealand
.” 2012. Web. 19 Apr 2021.
Vancouver:
Robinson BJ. Hydrodynamic impacts of tectonics in prehistoric Ohiwa Harbour, North Island, New Zealand
. [Internet] [Masters thesis]. University of Waikato; 2012. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/10289/6478.
Council of Science Editors:
Robinson BJ. Hydrodynamic impacts of tectonics in prehistoric Ohiwa Harbour, North Island, New Zealand
. [Masters Thesis]. University of Waikato; 2012. Available from: http://hdl.handle.net/10289/6478

Colorado State University
7.
Turner, David.
Fragility assessment of bridge superstructures under hydrodynamic forces.
Degree: MS(M.S.), Civil and Environmental Engineering, 2015, Colorado State University
URL: http://hdl.handle.net/10217/170400
► On September 11-17, 2013, Colorado suffered devastating and widespread flash flooding which spread 150 miles, from Colorado Springs north to Fort Collins impacting 24 counties.…
(more)
▼ On September 11-17, 2013, Colorado suffered devastating and widespread flash flooding which spread 150 miles, from Colorado Springs north to Fort Collins impacting 24 counties. The flood damaged several bridges as well as over 400 miles of state roads. As a result of the transportation damage, residents of Drake, Colorado were isolated and had to be evacuated via helicopter. This thesis aims to determine the failure risk associated with the inundation of bridge superstructures. A linear network of eight bridges near Drake, Colorado is selected for analysis which includes three unique structural configurations. Flood analysis is performed using the design equations presented by Kerenyi et al. (2009) which follows the same equation format that is listed in AASHTO. Fragilities are developed for the most critical internal and external composite girders for each bridge. The results obtained from fragility analysis are then used to determine the elevation adjustments needed to reach a target beta value of 3.5. Based on the analysis conducted in this thesis, it was found that the forces associated with bridge deck inundation, more specifically, in fast-moving mountain rivers is substantial and needs to be considered in design. Currently, bridge superstructures are designed based on the 100 year flood, which in the case of the bridges in this study, would not have resulted in any inundation of the bridge deck at the time of construction based on the knowledge at that time. To counter this, bridge superstructures should be designed based on the 500 year flood which would incorporate inundation forces in the initial design. The methodology presented in this thesis can be used to assess and improve the flood vulnerability for any communities' bridge network.
Advisors/Committee Members: van de Lindt, John (advisor), Senior, Bolivar (committee member), Atadero, Rebecca (committee member).
Subjects/Keywords: bridge; fragility; hydrodynamic; superstructure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Turner, D. (2015). Fragility assessment of bridge superstructures under hydrodynamic forces. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/170400
Chicago Manual of Style (16th Edition):
Turner, David. “Fragility assessment of bridge superstructures under hydrodynamic forces.” 2015. Masters Thesis, Colorado State University. Accessed April 19, 2021.
http://hdl.handle.net/10217/170400.
MLA Handbook (7th Edition):
Turner, David. “Fragility assessment of bridge superstructures under hydrodynamic forces.” 2015. Web. 19 Apr 2021.
Vancouver:
Turner D. Fragility assessment of bridge superstructures under hydrodynamic forces. [Internet] [Masters thesis]. Colorado State University; 2015. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/10217/170400.
Council of Science Editors:
Turner D. Fragility assessment of bridge superstructures under hydrodynamic forces. [Masters Thesis]. Colorado State University; 2015. Available from: http://hdl.handle.net/10217/170400

Delft University of Technology
8.
Zhu, Rui (author).
Hydrodynamic analysis for the Undaria pinnatifida (Wakame).
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:e5feea20-a183-4ed7-95bb-1fd077ab6724
► With the depletion of traditional energy sources, development of renewable energy is turning into a necessity. Besides wind energy and solar energy, another alternative renewable…
(more)
▼ With the depletion of traditional energy sources, development of renewable energy is turning into a necessity. Besides wind energy and solar energy, another alternative renewable energy is biomass. Seaweed is seen as one of the most promising marine plants that can produce the biomass needed to partly satisfy of our future energy requirements. Seaweed cultivation is deemed as sustainable and environmentally friendly because it does not need fresh water, fertilizer and agricultural land. Furthermore, it converts greenhouse gases into oxygen and uptakes inorganic nitrogen and phosphorus from the seawater to avoid eutrophication. Stichting Noordzeeboerderij and MARIN (Maritime Research Institute The Netherlands) are working together to develop floating seaweed cultivation platforms for offshore. For this project, the loadings on the cultivation platform is interested. To accomplish this, this thesis will study the
hydrodynamic characteristics of the seaweed, as they are the main contributors to the loading on the cultivation platform. Then the loading on the single blade of the seaweed is required to be predicted. In this research, two most common and highly economic value seaweed species are chosen, Undaria pinnatifida (Wakame) and Laminaria saccharina. This thesis describes an experiment that was conducted in the TU Delft Environmental Fluid and Mechanics laboratory. In this experiment, a current flume was used to investigate the
hydrodynamic coefficients for the chosen types of seaweed. Before this, the physical and mechanical features such as density, geometrical and the flexural rigidity for the algae of interest were tested in MARIN workshop. Based on these feature parameters, an accurately designed surrogate (has the same or similar magnitude of parameters with the prototype) was constructed in order to imitate fresh algae for the flume experiments. During the experiment, the behavior of L.saccharina was found to be characterised by complex three-dimensional movement that is heavily influenced by the chaos pattern of the surrounding flow. Because the motions of Wakame are more planar so that easier to be simulated, Wakame was chosen to be the species to be studied in detail. Two numerical models, were written in MATLAB language, were computed for two movement phases in order to predict the loading and movement of an individual Wakame plant in a current. The first model is suitable for low velocities (0 to 0.57m/s) and simulates a swinging motion of the seaweed in the current. During this process,
hydrodynamic force, hydrostatic force, friction and gravity are taken into account. The steady-state position that is predicted by the model in steady fluid is well matched with the results that were measured in the experiment in the same situation. The second model is used for large velocities (0.57m/s to 2.5m/s) when the structure is designed to have a horizontal position as its initial position and equilibrium position. A stable motion was simulated when the velocity varies from…
Advisors/Committee Members: Metrikine, Andrei (mentor), Jarquin Laguna, Antonio (mentor), Lindeboom, René (mentor), Brouwers, Eef (mentor), Pisano, Federico (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Undaria pinnatifida; Hydrodynamic; Dynamics
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APA ·
Chicago ·
MLA ·
Vancouver ·
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Export
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APA (6th Edition):
Zhu, R. (. (2017). Hydrodynamic analysis for the Undaria pinnatifida (Wakame). (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:e5feea20-a183-4ed7-95bb-1fd077ab6724
Chicago Manual of Style (16th Edition):
Zhu, Rui (author). “Hydrodynamic analysis for the Undaria pinnatifida (Wakame).” 2017. Masters Thesis, Delft University of Technology. Accessed April 19, 2021.
http://resolver.tudelft.nl/uuid:e5feea20-a183-4ed7-95bb-1fd077ab6724.
MLA Handbook (7th Edition):
Zhu, Rui (author). “Hydrodynamic analysis for the Undaria pinnatifida (Wakame).” 2017. Web. 19 Apr 2021.
Vancouver:
Zhu R(. Hydrodynamic analysis for the Undaria pinnatifida (Wakame). [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Apr 19].
Available from: http://resolver.tudelft.nl/uuid:e5feea20-a183-4ed7-95bb-1fd077ab6724.
Council of Science Editors:
Zhu R(. Hydrodynamic analysis for the Undaria pinnatifida (Wakame). [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:e5feea20-a183-4ed7-95bb-1fd077ab6724

Delft University of Technology
9.
Haenen, Anner (author).
A Study on the Potential of a Neural Network Based Model in Predicting Hydrodynamic Behavior of a Semi-Submersible Crane Vessel.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:80de3693-2483-468b-9dcc-5960288ca869
► Heerema Marine Contractors (HMC) is a contractor in the international offshore oil, gas and renewables industry. It is specialized in transporting, installing and removing large…
(more)
▼ Heerema Marine Contractors (HMC) is a contractor in the international offshore oil, gas and renewables industry. It is specialized in transporting, installing and removing large offshore facilities. HMC operates three crane vessels. Two of which are semi-submersibles (Thialf and Balder), the other is the monohull Aegir. A third semi-submersible, the Sleipnir, is currently under construction. To ensure safe operations, make accurate fatigue predictions and extend operational windows, HMC relies on vessel motion calculations. Currently, vessel motion estimations are based on response amplitude operators calculated by the diffraction software package WAMIT. As HMC cannot rely on diffraction software in case of non-linear vessel motions, the need for a method capable of capturing non-linear effects arises. The goal of this study is to determine the potential of a neural network based model in predicting
hydrodynamic behavior of semi-submersible crane vessels. Hindcast weather data, vessel motion measurements and model test data are used to train several different neural network architectures. The research into the potential of neural networks in predicting
hydrodynamic behavior is split into two main categories: the frequency domain and the time domain. Within the frequency domain, wave forecasts can be used to predict a response spectrum. The neural network in this case acts as a conventional RAO. In an artificial environment, four architectures are tested and the results show that neural networks are able to make accurate predictions in a fully linear environment. When tested on project data, where the vessel sails at operational draft, the neural network predictions shows a slightly higher accuracy than the diffraction based predictions for the specific test case. Another network is tested on transit data, where the vessel sails at an inconvenient draft. The results from these tests show that there is potential for a neural network to be used as a substitute for Response Amplitude Operators. The time domain models focus on predicting ship response based on surface height signals and/or hindcast vessel motion measurements. The first model is trained and tested on model test data from an SSCV. The input of the neural network is surface height measurements and the output is pitch motion prediction. The model shows that it is capable of predicting both first and second order pitch motions. Another time domain model has MRU roll measurements as input and it tries to predict the future 60 seconds of roll motion. Many network topologies and optimizer settings are tested but none are capable of predicting future motions.
Advisors/Committee Members: de Bruin, Ruben (mentor), Lourens, Eliz-Mari (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Neural Networks; Hydrodynamic behaviour
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Haenen, A. (. (2018). A Study on the Potential of a Neural Network Based Model in Predicting Hydrodynamic Behavior of a Semi-Submersible Crane Vessel. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:80de3693-2483-468b-9dcc-5960288ca869
Chicago Manual of Style (16th Edition):
Haenen, Anner (author). “A Study on the Potential of a Neural Network Based Model in Predicting Hydrodynamic Behavior of a Semi-Submersible Crane Vessel.” 2018. Masters Thesis, Delft University of Technology. Accessed April 19, 2021.
http://resolver.tudelft.nl/uuid:80de3693-2483-468b-9dcc-5960288ca869.
MLA Handbook (7th Edition):
Haenen, Anner (author). “A Study on the Potential of a Neural Network Based Model in Predicting Hydrodynamic Behavior of a Semi-Submersible Crane Vessel.” 2018. Web. 19 Apr 2021.
Vancouver:
Haenen A(. A Study on the Potential of a Neural Network Based Model in Predicting Hydrodynamic Behavior of a Semi-Submersible Crane Vessel. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Apr 19].
Available from: http://resolver.tudelft.nl/uuid:80de3693-2483-468b-9dcc-5960288ca869.
Council of Science Editors:
Haenen A(. A Study on the Potential of a Neural Network Based Model in Predicting Hydrodynamic Behavior of a Semi-Submersible Crane Vessel. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:80de3693-2483-468b-9dcc-5960288ca869

Delft University of Technology
10.
Liu, Yun (author).
Flexible Floating Island.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:f9541b64-8e60-4605-991f-d7ac762b5fb0
► Nowadays, fears over rising sea levels due to global warming have prompted many countries with lands below sea level to find solutions to ensure the…
(more)
▼ Nowadays, fears over rising sea levels due to global warming have prompted many countries with lands below sea level to find solutions to ensure the safety of nation and citizen. Furthermore, the development and utilization of marine resources have always been a topic of interest. Due to these necessities, the concept of flexible floating islands that can be used for fish farm, energy islands and residence has emerged. The flexible floating island consists of many smaller identical triangles connected by springs. This design is convenient for installation, disassembly, and diversification of functions. The main objective of this thesis is to investigate and analyze the forces acting on and motions of the flexible floating islands due to the interaction with regular waves; a numerical model is an excellent way to complete that mission. The floating islands in waves that are constrained with mooring lines have translational and rotational motions under the combined effect of
hydrodynamic, hydrostatic, gravitational and mooring forces. The approach for solving the forces starts with linear potential theory, which means that uncompressed inviscid flow is assumed. After marking out the identical smaller panels on the wetted surfaces of each small triangle, the interface conditions between the triangle and the fluid are satisfied, thereby obtaining the source strength for each panel. With the expressions for the potentials, all the
hydrodynamic coefficients including added mass, damping and wave exciting forces can be evaluated. Finally, the response of islands can be evaluated by using the equations of motions of the island in the time domain and converting them to the frequency domain. Two models are created in this thesis, a single island model and a two-island model, the former focuses on learning the methods for solving the hydromechanics coefficients, and the latter focuses on the
hydrodynamic interaction between the two islands.
Advisors/Committee Members: Metrikine, Andrei (mentor), Keijdener, Chris (mentor), Pisano, Federico (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: hydromechanics; potential theory; hydrodynamic interaction
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, Y. (. (2019). Flexible Floating Island. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:f9541b64-8e60-4605-991f-d7ac762b5fb0
Chicago Manual of Style (16th Edition):
Liu, Yun (author). “Flexible Floating Island.” 2019. Masters Thesis, Delft University of Technology. Accessed April 19, 2021.
http://resolver.tudelft.nl/uuid:f9541b64-8e60-4605-991f-d7ac762b5fb0.
MLA Handbook (7th Edition):
Liu, Yun (author). “Flexible Floating Island.” 2019. Web. 19 Apr 2021.
Vancouver:
Liu Y(. Flexible Floating Island. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 19].
Available from: http://resolver.tudelft.nl/uuid:f9541b64-8e60-4605-991f-d7ac762b5fb0.
Council of Science Editors:
Liu Y(. Flexible Floating Island. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:f9541b64-8e60-4605-991f-d7ac762b5fb0

University of Illinois – Urbana-Champaign
11.
Lu, Xiaoyi.
Hydrodynamic stability of a premixed flame subjected to transverse shear.
Degree: PhD, Theoretical & Applied Mechans, 2020, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/107896
► Flame instabilities arise intrinsically in combustion systems and have important implication in the operation of engineering devices. The primary intrinsic instability of premixed combustion is…
(more)
▼ Flame instabilities arise intrinsically in combustion systems and have important implication in the operation of engineering devices. The primary intrinsic instability of premixed combustion is caused by thermal gas-expansion, known as the
hydrodynamic or the Darrieus-Landau (DL) instability. Consequently, a premixed flame is susceptible to disturbances. The flame tends to develop a wrinkled or corrugated front with a cusp-like structure at a large scale. Once formed, the flame front always spikes towards the burned gas region and bows on the unburned gas region. The DL stability plays a crucial role in the
hydrodynamic behaviors of a premixed flame and has many ramifications when premixed combustion takes place in practice.
We study the
hydrodynamic behavior of a premixed flame under the influence of a transversely shearing flow. A new problem configuration is proposed to gain a fundamental understanding of the premixed flame-shear interaction. The shear flow is introduced such that unburned and burned gases separated by the standard planar flame have opposite flow velocities in the flame transverse direction. This setting idealizes situations found in practical premixed combustion systems, for example, swirl-stabilized burners and gas turbines. Recent studies, made possible by Direct Numerical Simulations (DNS) and Large-Eddy Simulations (LES), have provided rich data for the description of premixed combustion in turbulent shear flows. And yet, little attention has been given to the effects of mean shear on the
hydrodynamic stability. This work intends to fill the gap and shed some light on the premixed flame-shear interaction.
This thesis presents a three-step study to address the linear, weakly nonlinear, and fully nonlinear stabilities of a premixed flame subjected to a transverse shear. First, the linear analysis extends the classical DL configuration and solves the linearized stability problem. The key result is a dispersion relation and its distinguished limits that reveal the conditions for the onset of
hydrodynamic instability. Second, the weakly nonlinear analysis derives the modified Michelson-Sivashinsky (MS) equation, a time-dependent partial differential equation (PDE) describing the evolution of a hydrodynamically unstable premixed flame front in the weak thermal expansion limit. Solutions of the modified MS equation demonstrates the formation process of a skewed cusp-like flame pattern as well as the long-time behaviors beyond the linear regime when the premixed flame is affected by shear. The parametric study identifies the effect of each parameter on the flame dynamics. Third, a computational solver is developed for numerical simulations of premixed flames at the
hydrodynamic flame-sheet level, based on the same mathematical formulation of linear and nonlinear analysis. Without restrictions on the amplitude of flame deformation and the density variation, the solver is used to conduct a series of numerical experiments to explore the fully nonlinear behaviors of premixed flames in a shearing flow.
Advisors/Committee Members: Pantano, Carlos (advisor), Matalon, Moshe (Committee Chair), Fischer, Paul (committee member), Panesi, Marco (committee member).
Subjects/Keywords: premixed flames; hydrodynamic stability
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lu, X. (2020). Hydrodynamic stability of a premixed flame subjected to transverse shear. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/107896
Chicago Manual of Style (16th Edition):
Lu, Xiaoyi. “Hydrodynamic stability of a premixed flame subjected to transverse shear.” 2020. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 19, 2021.
http://hdl.handle.net/2142/107896.
MLA Handbook (7th Edition):
Lu, Xiaoyi. “Hydrodynamic stability of a premixed flame subjected to transverse shear.” 2020. Web. 19 Apr 2021.
Vancouver:
Lu X. Hydrodynamic stability of a premixed flame subjected to transverse shear. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2020. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/2142/107896.
Council of Science Editors:
Lu X. Hydrodynamic stability of a premixed flame subjected to transverse shear. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2020. Available from: http://hdl.handle.net/2142/107896

University of Hawaii – Manoa
12.
Yuan, Tiantian.
Using strong gravitationally lensed galaxies to probe the metallicity history of star-forming galaxies between redshift 1 and 3.
Degree: 2016, University of Hawaii – Manoa
URL: http://hdl.handle.net/10125/100785
► Ph.D. University of Hawaii at Manoa 2012.
This thesis conducts the investigation into the metallicity history of galaxies between redshift 1 and 3, using gravitationally…
(more)
▼ Ph.D. University of Hawaii at Manoa 2012.
This thesis conducts the investigation into the metallicity history of galaxies between redshift 1 and 3, using gravitationally lensed galaxies. We use metallicity as a tool to understand the formation and evolution history of galaxies. We direct our research in two areas. 1. We combine our new sample of gravitationally lensed galaxies with existing lensed and nonlensed samples to conduct the largest investigation so far into the mass-metallicity (MZ) relation at z > 1. We apply a self-consistent metallicity calibration scheme to investigate the metallicity evolution of star-forming galaxies as a function of redshift. We find that at the median redshift of z = 2.07, the median metallicity of the lensed sample is 0.35 dex lower than the local SDSS starforming galaxies and 0.18 dex lower than the z ∼ 0.8 DEEP2 galaxies. Our lensed sample shows a much larger metallicity range and scatter (> 0.2 dex) than the z ∼ 2 UV selected galaxies at similar masses. These offsets translate into a metallicity evolution of-0.23±0.01 dex per unit redshift from z ∼ 0 → 1, and-0.14 ± 0.08 dex per unit redshift from z ∼ 1 → 3. A more rapid evolution is seen between z ∼ 1 → 3 (with a mean fall in metallicity of-0.05 ± 0.01 dex Gyr−1) than z ∼ 0 → 1 (-0.020 ±0.001 dex Gyr−1). This evolution agrees with the most recent cosmological hydrodynamic simulations with momentum driven winds within the errors. 2. Combining the magnification power of gravitational lensing and AO-aided Integral Field Unit spectrographs (IFUs) is the only way to achieve sufficient signal-to-noise and angular resolution for spatially resolved metallicity studies. Using this technique, we present the first metallicity gradient measurement for a grand-design face-on spiral galaxy at z ∼ 1.5. The gradients of our spiral and another 2 lensed galaxies at z ∼ 2 are much steeper than local disk galaxies, supporting an "inside-out" galaxy formation scenario. We also report spatially resolved emission lines of a z ∼ 1 lensed galaxy. We find significant shock excitation due to galactic outflows. Our analysis suggests that shocked regions may mimic flat or inverted metallicity gradients at high redshift. We find that high angular resolution observations provide the most accurate metallicity gradient measurement,whereas seeing-limited studies under estimate the slope of the gradients
Subjects/Keywords: gravitational lensing; cosmological hydrodynamic simulations
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yuan, T. (2016). Using strong gravitationally lensed galaxies to probe the metallicity history of star-forming galaxies between redshift 1 and 3. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/100785
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yuan, Tiantian. “Using strong gravitationally lensed galaxies to probe the metallicity history of star-forming galaxies between redshift 1 and 3.” 2016. Thesis, University of Hawaii – Manoa. Accessed April 19, 2021.
http://hdl.handle.net/10125/100785.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yuan, Tiantian. “Using strong gravitationally lensed galaxies to probe the metallicity history of star-forming galaxies between redshift 1 and 3.” 2016. Web. 19 Apr 2021.
Vancouver:
Yuan T. Using strong gravitationally lensed galaxies to probe the metallicity history of star-forming galaxies between redshift 1 and 3. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/10125/100785.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yuan T. Using strong gravitationally lensed galaxies to probe the metallicity history of star-forming galaxies between redshift 1 and 3. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/100785
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Iowa State University
13.
De Alwis, Steven Hiran.
Hydrodynamic cavitation for scalable exfoliation of few layered graphene nanosheets.
Degree: 2020, Iowa State University
URL: https://lib.dr.iastate.edu/etd/18303
► A simple method for scalable exfoliation of biocompatible few layered graphene (FLG) dispersions is developed using an inexpensive hydrodynamic cavitation setup. Hydrodynamic cavitation is used…
(more)
▼ A simple method for scalable exfoliation of biocompatible few layered graphene (FLG) dispersions is developed using an inexpensive hydrodynamic cavitation setup. Hydrodynamic cavitation is used for the exfoliation. Unlike acoustic cavitation, the primary way of bubble collapse in hydrodynamic cavitation is caused laterally, thereby separating two adjacent flakes by a shear effect. The process utilizes a known protein, Bovine Serum Albumin (BSA), which acts as an effective exfoliation agent and provides stability by preventing restacking of the graphene layers. This is because BSA possesses both hydrophobic as well as hydrophilic sections. The hydrophobic section is absorbed on graphene, which also is hydrophobic. This assists in the formation of dispersions and potentially prevents restacking of graphene. Development of potentially scalable biocompatible methods are critical for producing costeffective non-toxic graphene, enabling numerous possible biomedical and biological applications. A methodical study was performed to identify the effect of time in a novel hydrodynamic cavitation system for graphene exfoliation. The fabricated product was characterized using Raman spectroscopy and Transmission electron microscopy. It was found that with time the number of layers of graphene seem to decrease based on the I2D/IG ratio where at 6 hours the ratio was at 0.307 but along with that disorder in graphene seem to increase based on the ID/IG ratio which reached up to .33 from .25 at 4.5 hours. Based on the data in the study, evidence of a direct relationship between graphene exfoliation and cavitation is found. Therefore, the paper provides the theoretical and the computational analysis needed to create an optimized cavitation model to potentially improve graphene exfoliation using hydrodynamics.
Subjects/Keywords: Biocompatible; Cavitation; Graphene; Hydrodynamic
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
De Alwis, S. H. (2020). Hydrodynamic cavitation for scalable exfoliation of few layered graphene nanosheets. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/18303
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
De Alwis, Steven Hiran. “Hydrodynamic cavitation for scalable exfoliation of few layered graphene nanosheets.” 2020. Thesis, Iowa State University. Accessed April 19, 2021.
https://lib.dr.iastate.edu/etd/18303.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
De Alwis, Steven Hiran. “Hydrodynamic cavitation for scalable exfoliation of few layered graphene nanosheets.” 2020. Web. 19 Apr 2021.
Vancouver:
De Alwis SH. Hydrodynamic cavitation for scalable exfoliation of few layered graphene nanosheets. [Internet] [Thesis]. Iowa State University; 2020. [cited 2021 Apr 19].
Available from: https://lib.dr.iastate.edu/etd/18303.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
De Alwis SH. Hydrodynamic cavitation for scalable exfoliation of few layered graphene nanosheets. [Thesis]. Iowa State University; 2020. Available from: https://lib.dr.iastate.edu/etd/18303
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cambridge
14.
Meng, Luwen.
Hydrodynamically modulated voltammetry in microreactors.
Degree: PhD, 2019, University of Cambridge
URL: https://doi.org/10.17863/CAM.35767
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767762
► This thesis describes modulated methods using both voltammetric and microfluidic perturbations to study mechanisms of electrolysis reactions. The initial chapters provide an overview of applications…
(more)
▼ This thesis describes modulated methods using both voltammetric and microfluidic perturbations to study mechanisms of electrolysis reactions. The initial chapters provide an overview of applications and research development in the fields of micro-engineering and electrochemistry, including microfabrication methodology, electrochemical detection techniques and analysis methods. Some typical electrochemical reactions have been studied for different kinds of industrial applications. Also hydrodynamic modulation methods have been investigated. The result chapters begin in Chapter 3 with detailed investigation of various electrochemical reactions by using cyclic voltammetry (CV) and large amplitude Fourier transformed alternating current voltammetry (FTACV) under microfluidic conditions. Single electron transfer reactions with different kinetics were studied first by using potassium ferrocyanide and ferrocenecarboxylic acid (FCA). Dual electron transfer reactions with different pathways were investigated by using 2,5-dihydroxybenzoic acid for one step oxidation and N,N,N',N'-tetramethyl-para-phenylene-diamine (TMPD) for two consecutive one-electron step oxidation. An irreversible reaction was explored by using borohydride solution. Examples of homogeneous reaction mechanisms were studied by using the combinations of Fe(CN)64-/L-cysteine or TMPD/ascorbic acid. The current response of all the electrolysis reactions except single electron transfer reactions was first reported under microfluidic conditions with FTACV, which has shown sensitive with the change of volume flow rates and the substrate concentrations when homogeneous reactions are involved. The linear relationships between peak current and volume flow rates or substrate concentrations can be obtained in every harmonic component. In chapter 4, the modulated technique was applied to microfluidic hydrodynamic systems. A range of electrolysis mechanisms including single electron transfer reactions, dual electron transfer reactions, irreversible reaction and homogeneous reactions were studied under hydrodynamic modulated conditions. The system showed rapid response with the change of volume flow rates during one measurement. The linear relationships between peak current and flow rates, as well as substrate concentrations, can be obtained simultaneously in one scan, which reveals a promising approach to get more information in a short-time measurement. Chapter 5 demonstrated a new protocol by forcing an oscillation of the electrochemical active solution flowing. Analysis of transition time and its effect on limiting current are presented to begin exploration of this new tool for supporting researchers on understanding redox mechanisms. A short simulated study was carried out to help better understand the mechanism under different hydrodynamic conditions.
Subjects/Keywords: 660; microreactors; electrochemistry; hydrodynamic modulation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Meng, L. (2019). Hydrodynamically modulated voltammetry in microreactors. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.35767 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767762
Chicago Manual of Style (16th Edition):
Meng, Luwen. “Hydrodynamically modulated voltammetry in microreactors.” 2019. Doctoral Dissertation, University of Cambridge. Accessed April 19, 2021.
https://doi.org/10.17863/CAM.35767 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767762.
MLA Handbook (7th Edition):
Meng, Luwen. “Hydrodynamically modulated voltammetry in microreactors.” 2019. Web. 19 Apr 2021.
Vancouver:
Meng L. Hydrodynamically modulated voltammetry in microreactors. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Apr 19].
Available from: https://doi.org/10.17863/CAM.35767 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767762.
Council of Science Editors:
Meng L. Hydrodynamically modulated voltammetry in microreactors. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://doi.org/10.17863/CAM.35767 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767762
15.
Almeida, Ana Paula Fonseca de.
Caracterização e avaliação de colunas de recheio utilizando radiotraçadores.
Degree: 2019, Instituto de Engenharia Nuclear; Mestrado em Ciências e Tecnologias Nucleares; IEN; Brasil; Instituto de Engenharia Nuclear
URL: http://carpedien.ien.gov.br:8080/handle/ien/3006
► Submitted by Almir Azevedo ([email protected]) on 2019-12-06T16:40:35Z No. of bitstreams: 1 dissertação mestrado ien 2019 Ana Paula F. de Almeida.pdf: 2606434 bytes, checksum: 191cfc7a75907e8338ab9240be21f5c1 (MD5)…
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Colunas de recheio são extremamente importantes na indústria química e são usadas para processos de purificação, separação e tratamento de misturas de gás ou líquidos. O objetivo deste trabalho foi estudar a hidrodinâmica do fluido para a caracterização de padrões de fluxo de fase aquosa na coluna de recheio, associando à metodologia das curvas da Distribuição do Tempo de Residência (RTD) para analisar e associar modelos teóricos que possam descrever as condições operacionais da coluna. A Distribuição do
Te mpo de Residência pode ser obtida com a utilização da técnica estímulo-resposta que é caracterizada pela injeção instantânea de um radiotraçador na entrada do sistema. Neste trabalho, foi utilizado o 68 Ga como radiotraçador. Cinco detectores cintiladores N aI(Tl) 1x1" blindados e colimados adequadamente foram posicionados para registrar o movimento de percurso do radiotra ç ador na coluna de recheio. Possibilitando a análise da curva de Distribuição do Tempo de Residência nas regiões de interesse. Com os dados gerados pelos detectores NaI(Tl) com a passagem do radiotraçador n o interior da coluna, foi possível avaliar o perfil de fluxo da fase aquosa e identificar falhas operacionais, como canalização interna e existência de zona de retenção no interior da colun a. Foram utilizados modelos teóricos para escoamentos de fluxo diferentes: o fluxo pistão , misturador perfeito, n misturador perfeito em série e dispersão axial.
Packed columns are extremely important in chemical
industry and are used for processes of purification, separation and treatment of gas or liquid mixtures. The aim of this work was to study the hydrodynamics of fluid for the characterization of aqueous phase flow patterns in the packed columns, associating the methodology of the curves of the residence time distribution (RTD) to analyze the theoretical models that might describe the operational conditions of the column. The residence time distribution can be obtained with the use of stimulus-response technique that is characterized by instantaneous injection of a radiotracer at the entrance to the system. In this work, the 68Ga was used as radiotracer. Five detectors scintillators NaI(Tl) 1x1" shielded and collimated properly were positioned to register the movement of radiotracer route in the packed column. Enabling the residence time distribution curve analysis in the regions of interest. The data generated by NaI(Tl) detectors with the passage of radiotracer in inside the column,
it was possible to evaluate the profile of flow of aqueous phase and identify operational failures,…
Advisors/Committee Members: Brandão, Luís Eduardo Barreira, Salgado, César Marques, Moreira, Maria de Lourdes, Silva, Ademir Xavier da, Salgado, Cesar Marques, Brandão, Luís Eduardo Barreira Brandão.
Subjects/Keywords: Radiotracers; Filling column; RTD; Hydrodynamic
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APA (6th Edition):
Almeida, A. P. F. d. (2019). Caracterização e avaliação de colunas de recheio utilizando radiotraçadores. (Masters Thesis). Instituto de Engenharia Nuclear; Mestrado em Ciências e Tecnologias Nucleares; IEN; Brasil; Instituto de Engenharia Nuclear. Retrieved from http://carpedien.ien.gov.br:8080/handle/ien/3006
Chicago Manual of Style (16th Edition):
Almeida, Ana Paula Fonseca de. “Caracterização e avaliação de colunas de recheio utilizando radiotraçadores.” 2019. Masters Thesis, Instituto de Engenharia Nuclear; Mestrado em Ciências e Tecnologias Nucleares; IEN; Brasil; Instituto de Engenharia Nuclear. Accessed April 19, 2021.
http://carpedien.ien.gov.br:8080/handle/ien/3006.
MLA Handbook (7th Edition):
Almeida, Ana Paula Fonseca de. “Caracterização e avaliação de colunas de recheio utilizando radiotraçadores.” 2019. Web. 19 Apr 2021.
Vancouver:
Almeida APFd. Caracterização e avaliação de colunas de recheio utilizando radiotraçadores. [Internet] [Masters thesis]. Instituto de Engenharia Nuclear; Mestrado em Ciências e Tecnologias Nucleares; IEN; Brasil; Instituto de Engenharia Nuclear; 2019. [cited 2021 Apr 19].
Available from: http://carpedien.ien.gov.br:8080/handle/ien/3006.
Council of Science Editors:
Almeida APFd. Caracterização e avaliação de colunas de recheio utilizando radiotraçadores. [Masters Thesis]. Instituto de Engenharia Nuclear; Mestrado em Ciências e Tecnologias Nucleares; IEN; Brasil; Instituto de Engenharia Nuclear; 2019. Available from: http://carpedien.ien.gov.br:8080/handle/ien/3006

NSYSU
16.
Shen, Meng-hui.
Form Error Compensation of axially symmetrical surface:Rock-and-Roll motion planning of tool.
Degree: Master, Mechanical and Electro-Mechanical Engineering, 2007, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0910107-103130
► A process planning strategy was proposed to suppress the wear effect of tool in a polishing of axially symmetrical work. This strategy can keep machining…
(more)
▼ A process planning strategy was proposed to suppress the wear effect of tool in a polishing of axially symmetrical work. This strategy can keep machining rate of tool to be constant. In study, we need to design the proper dwelling time distribution for tool to remove error of axially symmetrical surface and use computer to simulate. Observe the residual error on surface of work. Analyze the outcome of experiment and estimate feasibility of the strategy. According to the way of motion of tool, it could cause two difficulties:
1.To design the dwelling time distribution of tool will be more difficult.
2.The load of tool will be unstable.
In order to solve this first difficulty, in a new strategy of working, the dwelling time distribution of tool must be a multiple of integral of the period of work rotation. And experiment to prove it, analyze and discuss the outcome of experiment.
Second problem cause the load of tool to be unstable in experiment. To improve the load of tool, a new strategy was proposed to control load and to verify effectiveness for the strategy.
Finally, analysis and discuss the outcome of experiment, and estimate the practicability of the strategy.
Advisors/Committee Members: Tu-Chich Hung (chair), Yaw-Terng Su (committee member), Jung-Shu Wu (chair), KUANG-HUA FUH (chair).
Subjects/Keywords: wear; hydrodynamic polishing
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shen, M. (2007). Form Error Compensation of axially symmetrical surface:Rock-and-Roll motion planning of tool. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0910107-103130
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shen, Meng-hui. “Form Error Compensation of axially symmetrical surface:Rock-and-Roll motion planning of tool.” 2007. Thesis, NSYSU. Accessed April 19, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0910107-103130.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shen, Meng-hui. “Form Error Compensation of axially symmetrical surface:Rock-and-Roll motion planning of tool.” 2007. Web. 19 Apr 2021.
Vancouver:
Shen M. Form Error Compensation of axially symmetrical surface:Rock-and-Roll motion planning of tool. [Internet] [Thesis]. NSYSU; 2007. [cited 2021 Apr 19].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0910107-103130.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shen M. Form Error Compensation of axially symmetrical surface:Rock-and-Roll motion planning of tool. [Thesis]. NSYSU; 2007. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0910107-103130
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
17.
Tsai, Tzu-dang.
Study on Lubricating Properties of Emulsions in Cold Rolling.
Degree: Master, Mechanical and Electro-Mechanical Engineering, 2009, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0814109-164505
► In this study, a model suitable for the plasto-hydrodynamic lubrication of cold rolling with the oil-in-water emulsions has been developed. The coupled modified Reynolds and…
(more)
▼ In this study, a model suitable for the plasto-
hydrodynamic lubrication of cold rolling with the oil-in-water emulsions has been developed. The coupled modified Reynolds and von Karman equations are solved by the Newton-Raphson method. In the numerical simulation, the main factors of influencing the numerical convergence are the initial guess for the inlet film thickness and the inlet speed of strip. The inlet film thickness can be estimated by the Wilson and Walowit formula [5]. The effects of oil volume fraction, surface speed of roller, reduction ratio, forward tension, backward tension, pressure viscosity coefficient, and surface tension group on the lubricating properties of cold rolling are investigated.
Results show that the film thickness increases with increasing surface speed of roller, but its effects on the film pressure, the roll force and the roll torque are not conspicuous. In addition, the film thickness increases as the pressure viscosity coefficient increases. In the condition of the very low pressure viscosity coefficient,
hydrodynamic lubrication of cold rolling works by enhancing the forward tension. Ahead of the roll bite, the metal surface has a higher affinity to the oil phase so that water is excluded and the oil pooling is formed because of the difference in the viscosity of the two components of the emulsion. Hence, in the condition of the lower initial oil volume fraction, the thicker film thickness is formed by the higher oil volume fraction in the work zone due to the oil pooling. The oil pooling is mainly influenced by the surface tension group. The surface speed of roller and the reduction ratio could enhance the oil volume fraction ahead of the roll bite.
Advisors/Committee Members: Yuh-Ping Chang (chair), C. M. Lin (chair), Rong-Tsong Lee (committee member), Yuang-Cherng Chiou (committee member), Li-Ming Chu (chair).
Subjects/Keywords: emulsion; plasto-hydrodynamic lubrication; oil pooling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tsai, T. (2009). Study on Lubricating Properties of Emulsions in Cold Rolling. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0814109-164505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tsai, Tzu-dang. “Study on Lubricating Properties of Emulsions in Cold Rolling.” 2009. Thesis, NSYSU. Accessed April 19, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0814109-164505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tsai, Tzu-dang. “Study on Lubricating Properties of Emulsions in Cold Rolling.” 2009. Web. 19 Apr 2021.
Vancouver:
Tsai T. Study on Lubricating Properties of Emulsions in Cold Rolling. [Internet] [Thesis]. NSYSU; 2009. [cited 2021 Apr 19].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0814109-164505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tsai T. Study on Lubricating Properties of Emulsions in Cold Rolling. [Thesis]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0814109-164505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
18.
Darnell, Joel T.
Nowcast/forecast of storm surge and drawdown using a hybrid FE/ANN approach.
Degree: M.Oc.E., Ocean Engineering, 2004, Oregon State University
URL: http://hdl.handle.net/1957/22442
► In the northwestern Gulf of Mexico there is a need for reliable water level forecasts to facilitate safe commercial navigation, marine construction, and emergency management.…
(more)
▼ In the northwestern Gulf of Mexico there is a need for reliable water level
forecasts to facilitate safe commercial navigation, marine construction, and emergency
management. Though the low amplitude tides of the region can be predicted with
conventional harmonic techniques, frequent strong storms make accurate forecasts of
water levels difficult. Prediction of surge associated with storms is useful for
management of activities in low lying coastal areas
subject to flooding, while
prediction of drawdown is important for estimating the under keel clearance of deep
draft vessels.
First, this thesis presents the analysis of nine years of observations to quantify
the effects of extra-tropical storms on water level fluctuations at four locations along
the northwestern coast of the Gulf of Mexico. The monthly root-mean-square of the
meteorological component of the observed water level is shown to be of similar
magnitude to the astronomical tide from September to April, attributed to the weekly
passage of storm systems. Return periods for extreme maximum (surge) and
minimum (drawdown) meteorological water levels associated with these storms are
computed using a 9-year record of observed water levels. Significant surge and
drawdown water levels, defined as those exceeding 30 cm, are shown to have return
periods ranging from 0.17 to 7.14 years at the four stations studied. At the entrance to
Galveston Bay, Texas, both significant storm surge and drawdown can be expected to
occur about four times each year. These results reinforced the need to include
meteorological forcing in the forecasting of water levels in the region.
In an effort to provide more accurate water level forecasting within Galveston
Bay during storms, the finite element (FE)
hydrodynamic model ADCIRC was applied
to simulate a range of observed storm events by inclusion of wind stress and remote
forcing from the Gulf of Mexico. Comparisons with observations showed the limited
accuracy of ADCIRC, as applied here, in predicting the water level response for
drawdown events. Thus, the ADCIRC output was incorporated into a data
assimilation method utilizing artificial neural networks (ANN). This hybrid FE/ANN
approach substantially improved the pure FE simulations for short term forecasts and
also outperformed other forecasting methods. With further refinement, this hybrid
approach could provide operational forecasts of water levels within Galveston Bay
during storms.
Advisors/Committee Members: Cox, Daniel T. (advisor), Haller, Merrick (committee member).
Subjects/Keywords: Hydrodynamic weather forecasting
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Darnell, J. T. (2004). Nowcast/forecast of storm surge and drawdown using a hybrid FE/ANN approach. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/22442
Chicago Manual of Style (16th Edition):
Darnell, Joel T. “Nowcast/forecast of storm surge and drawdown using a hybrid FE/ANN approach.” 2004. Masters Thesis, Oregon State University. Accessed April 19, 2021.
http://hdl.handle.net/1957/22442.
MLA Handbook (7th Edition):
Darnell, Joel T. “Nowcast/forecast of storm surge and drawdown using a hybrid FE/ANN approach.” 2004. Web. 19 Apr 2021.
Vancouver:
Darnell JT. Nowcast/forecast of storm surge and drawdown using a hybrid FE/ANN approach. [Internet] [Masters thesis]. Oregon State University; 2004. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1957/22442.
Council of Science Editors:
Darnell JT. Nowcast/forecast of storm surge and drawdown using a hybrid FE/ANN approach. [Masters Thesis]. Oregon State University; 2004. Available from: http://hdl.handle.net/1957/22442

University of California – San Diego
19.
Kjolsing, Eric.
Investigations Supporting the Development of a Downhole Energy Harvesting System.
Degree: Structural Engineering, 2016, University of California – San Diego
URL: http://www.escholarship.org/uc/item/6qc6k79t
► Hydrocarbon well operators deploy downhole reservoir monitoring equipment in order to optimize the rate at which hydrocarbons are extracted. Alternative power sources are sought that…
(more)
▼ Hydrocarbon well operators deploy downhole reservoir monitoring equipment in order to optimize the rate at which hydrocarbons are extracted. Alternative power sources are sought that could be deployed in these harsh environments to replace or supplement standard power sources currently in use. To this end, four investigations were performed to support the design of such a device. In the first investigation base assumptions used in the preliminary design of an electromagnetic energy harvester were shown to be in doubt, implying that the expected power output would not meet initial projections. In the second investigation a parametric study was performed to understand how high uncertainty variables affect the natural frequency and damping ratio of a producing hydrocarbon well. In the third investigation a structural housing was designed to satisfy American Petroleum Institute load cases. Using finite element models and standard tube/casing geometries, design pressures were iterated until a permissible housing design was achieved. This preliminary design provided estimates of the radial width and volume in which energy harvesting and storage elements may be situated. In the last investigation two software programs were developed to estimate the energy that might be harvested from user specified harvester configurations. The programs are dependent on user input production tube accelerations; this permits well operators to use well-specific vibrational data as inputs to generate well-specific energy output estimates. Results indicate that a downhole energy harvesting tool is structurally feasible under reasonable operating conditions but conclusions regarding power output may only be made if actual downhole accelerations are known.
Subjects/Keywords: Engineering; Energy Harvesting; Hydrocarbon; Hydrodynamic Function; Piezoelectric
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kjolsing, E. (2016). Investigations Supporting the Development of a Downhole Energy Harvesting System. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/6qc6k79t
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kjolsing, Eric. “Investigations Supporting the Development of a Downhole Energy Harvesting System.” 2016. Thesis, University of California – San Diego. Accessed April 19, 2021.
http://www.escholarship.org/uc/item/6qc6k79t.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kjolsing, Eric. “Investigations Supporting the Development of a Downhole Energy Harvesting System.” 2016. Web. 19 Apr 2021.
Vancouver:
Kjolsing E. Investigations Supporting the Development of a Downhole Energy Harvesting System. [Internet] [Thesis]. University of California – San Diego; 2016. [cited 2021 Apr 19].
Available from: http://www.escholarship.org/uc/item/6qc6k79t.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kjolsing E. Investigations Supporting the Development of a Downhole Energy Harvesting System. [Thesis]. University of California – San Diego; 2016. Available from: http://www.escholarship.org/uc/item/6qc6k79t
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Minnesota
20.
Saddoris, David Allan.
Hydrodynamic separator sediment washout
testing.
Degree: MS, Civil Engineering, 2010, University of Minnesota
URL: http://purl.umn.edu/93641
► University of Minnesota M.S. thesis. July 2010. Major: Civil Engineering. Advisors: Omid Mohseni, John Gulliver. 1 computer file (PDF); vi, 53 pages.
Hydrodynamic separators are…
(more)
▼ University of Minnesota M.S. thesis. July 2010.
Major: Civil Engineering. Advisors: Omid Mohseni, John Gulliver. 1
computer file (PDF); vi, 53 pages.
Hydrodynamic separators are widely used in urban
areas for removal of suspended sediments and floatables from
stormwater due to limited land availability for the installation of
above ground stormwater best management practices (BMPs).
Hydrodynamic separators are often sized based on relatively
frequent storm events. However, during less frequent storm events,
device design treatment rates are exceeded and previously captured
sediments can be washed out of the devices. To study the potential
for scour and washout of previously deposited sediments in the
sumps of hydrodynamic separators under high flow conditions during
infrequent storm events, sediment washout testing methods using
mass balance were developed for both controlled field testing and
laboratory testing. The developed testing methods were utilized to
conduct sediment washout testing on three full scale hydrodynamic
separators: 1) an Environment21 V2B1 Model 4, 2) a STC1200
Stormceptor and 3) a 6-ft Downstream Defender. All three devices
were tested in the laboratory. The Environment21 V2B1 device was
also tested in the field. In addition to full scale testing, two
scale models were constructed and tested in the laboratory.
Previous work by others on describing sediment washout in standard
stormwater sumps was applied to data obtained from the sediment
washout tests to develop sediment washout functions which
incorporate non-dimensional parameters. Washout functions were
developed for each of the devices tested in the laboratory and the
field, as well as for a modified ecoStorm device previously tested
by others. The washout functions that were developed can be
incorporated, along with removal efficiency functions, into
continuous urban runoff models to predict maintenance schedules for
hydrodynamic separator devices.
Advisors/Committee Members: Omid Mohseni, John Gulliver.
Subjects/Keywords: Hydrodynamic separators; Stormwater; Sediment; Washout; Civil Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Saddoris, D. A. (2010). Hydrodynamic separator sediment washout
testing. (Masters Thesis). University of Minnesota. Retrieved from http://purl.umn.edu/93641
Chicago Manual of Style (16th Edition):
Saddoris, David Allan. “Hydrodynamic separator sediment washout
testing.” 2010. Masters Thesis, University of Minnesota. Accessed April 19, 2021.
http://purl.umn.edu/93641.
MLA Handbook (7th Edition):
Saddoris, David Allan. “Hydrodynamic separator sediment washout
testing.” 2010. Web. 19 Apr 2021.
Vancouver:
Saddoris DA. Hydrodynamic separator sediment washout
testing. [Internet] [Masters thesis]. University of Minnesota; 2010. [cited 2021 Apr 19].
Available from: http://purl.umn.edu/93641.
Council of Science Editors:
Saddoris DA. Hydrodynamic separator sediment washout
testing. [Masters Thesis]. University of Minnesota; 2010. Available from: http://purl.umn.edu/93641

University of Tasmania
21.
Leong, ZQ.
Effects of hydrodynamic interaction on an AUV operating close to a moving submarine.
Degree: 2014, University of Tasmania
URL: https://eprints.utas.edu.au/22899/2/Leong_whole_thesis_ex_pub_mat.pdf
;
https://eprints.utas.edu.au/22899/1/Leong_whole_thesis.pdf
► The work detailed in this thesis investigates the behaviour of the hydrodynamic interaction effects acting on an unappended AUV manoeuvring in proximity to a larger…
(more)
▼ The work detailed in this thesis investigates the behaviour of the hydrodynamic interaction effects acting on an unappended AUV manoeuvring in proximity to a larger moving underwater vehicle such as a submarine. The investigation examined the steady-state and transient interaction effects on the hydrodynamic coefficients of the AUV as a function of the relative: speed, longitudinal position, lateral position, and size between the two submerged vehicles. The work involved extensive development of Computational Fluid Dynamics (CFD) models to simulate the manoeuvres in order to map the interaction behaviour. Experimental Fluid Dynamics (EFD) involving captive-model tests of the two vehicles were carried out to validate and supplement the CFD data.
The results show that the hydrodynamic interaction acts to attract and repel the AUV at the stern and bow regions around the submarine, respectively. The magnitude of these attraction and repulsion interaction effects varied significantly due to small changes in the relative longitudinal position, suggesting the need of an accurate and fast responsive control system for the AUV to adequately maintain its trajectory around the submarine. These adverse interaction effects were found to be minimal around amidships of the moving submarine, suggesting a safe path for the AUV to approach or depart the submarine laterally within that region. In addition, the interaction effects on the hydrodynamic coefficients of the AUV were shown to reduce as the relative speed of the latter increased.
Due to the need to simulate large relative motions between the two vehicles, this thesis also investigate and identifies the merits of two dynamic mesh techniques within ANSYS CFX (i.e. Immersed Solids, and AMP Re-Meshing) to simulate multiple bodies in relative motion. Although the numerical models behind the techniques have undergone substantial development in recent years, as they are beta-features in ANSYS CFX there are currently no existing studies demonstrating their capabilities in modelling multiple bodies in relative motion. The developed CFD simulation models are suitable for future work involving appended AUVs and the coupling with a control system for manoeuvring simulations of multiple underwater vehicles.
Subjects/Keywords: Hydrodynamic; Interaction; Underwater; Vehicles; AUV; Submarine; interoperation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Leong, Z. (2014). Effects of hydrodynamic interaction on an AUV operating close to a moving submarine. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/22899/2/Leong_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/22899/1/Leong_whole_thesis.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Leong, ZQ. “Effects of hydrodynamic interaction on an AUV operating close to a moving submarine.” 2014. Thesis, University of Tasmania. Accessed April 19, 2021.
https://eprints.utas.edu.au/22899/2/Leong_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/22899/1/Leong_whole_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Leong, ZQ. “Effects of hydrodynamic interaction on an AUV operating close to a moving submarine.” 2014. Web. 19 Apr 2021.
Vancouver:
Leong Z. Effects of hydrodynamic interaction on an AUV operating close to a moving submarine. [Internet] [Thesis]. University of Tasmania; 2014. [cited 2021 Apr 19].
Available from: https://eprints.utas.edu.au/22899/2/Leong_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/22899/1/Leong_whole_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Leong Z. Effects of hydrodynamic interaction on an AUV operating close to a moving submarine. [Thesis]. University of Tasmania; 2014. Available from: https://eprints.utas.edu.au/22899/2/Leong_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/22899/1/Leong_whole_thesis.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University
22.
Prabhu T.
Hydrodynamic design of a centrifugal pump
impeller;.
Degree: 2013, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/14078
► The world of fluid machinery is vast and widespread having its wings in all aspects of life. From agriculture to air-conditioning, fluid machinery play an…
(more)
▼ The world of fluid machinery is vast and widespread
having its wings in all aspects of life. From agriculture to
air-conditioning, fluid machinery play an important role. A pump is
a machine that expends mechanical energy to increase the pressure
of a fluid and to move it from a region of low pressure to one of
high pressure by creating pressure difference between the suction
side and delivery side. Little information is known about the
complex flow phenomenon taking place inside it, but its performance
can be improved by optimizing various design parameters to produce
a streamlined flow. Conventionally, many aspects of the design of
an impeller are based on empirical formulae derived from experience
and thumb rules. Therefore, studying these parameters
mathematically will serve the purpose of increasing the efficiency
and also establishing a standard methodology for designing the
impeller. The main objective of the present work is to improve the
performance of a centrifugal pump with improved design of its
impeller by analyzing and optimizing the design parameters like
vane profile, inlet and outlet vane angles, number of vanes and
overall dimensions. In this work, design parameters of the impeller
are selected over a range, which influences the performance of the
pump. A unique solution is generally not obtained, different system
designs may be generated for a given application. The design
procedure is validated using standard computational fluid dynamics
(CFD) software. The fluent software used in this work simulates the
performance of the pump virtually and shows the flow pattern. The
present work establish theoretical and experimental methods for
design and testing of a pump and these methods eliminate the
laborious trial and error method, with multiple proto types to
arrive the best design of a pump. newline newline
newline
Appendix 1; pp.146-148
Advisors/Committee Members: Rudhramoorthy.R..
Subjects/Keywords: Hydrodynamic; centrifugal; computation fluid dynamics;
impeller; pump
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
T, P. (2013). Hydrodynamic design of a centrifugal pump
impeller;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/14078
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
T, Prabhu. “Hydrodynamic design of a centrifugal pump
impeller;.” 2013. Thesis, Anna University. Accessed April 19, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/14078.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
T, Prabhu. “Hydrodynamic design of a centrifugal pump
impeller;.” 2013. Web. 19 Apr 2021.
Vancouver:
T P. Hydrodynamic design of a centrifugal pump
impeller;. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Apr 19].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/14078.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
T P. Hydrodynamic design of a centrifugal pump
impeller;. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/14078
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University
23.
Sundaramoorthy N.
Experimental investigation on hydrodynamic suspension and
mixing time characteristics of jet mixer;.
Degree: hydrodynamic suspension and mixing time
characteristics of jet mixer, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/26035
► The work on holdup mixing time and solid suspension in jet mixer newlinewith top entry nozzle is very few Hence, an experimental and theoretical newlinestudy…
(more)
▼ The work on holdup mixing time and solid suspension
in jet mixer newlinewith top entry nozzle is very few Hence, an
experimental and theoretical newlinestudy of holdup mixing time and
solid suspension characteristics in jet mixer newlinewere carried
out The effects of geometrical aspects of jet mixer and fluid
newlineproperties on the holdup and mixing time characteristics
were also studied newlineSolid Suspension studies have been carried
out for different particle sizes and newlinefor different loading
newlineFive nozzles of different diameters 1 mm 10 mm 15 mm 22 mm
newlineand 2 mm were designed fabricated and tested Three nozzles
positions from newlinethe bottom of the tank 21 cm 27 cm and 30 cm
were selected and tested newlineWater was taken as Newtonian fluid
and Carboxyl Methyl Cellulose and newlineGaurgum with different
concentrations were taken as NonNewtonian fluids newlineSand and
quartz were taken as the solid materials in suspension studies
newline newline
Reference p.121-127
Advisors/Committee Members: Saravanan K.
Subjects/Keywords: hydrodynamic suspension; mechanical engineering; mixing time characteristics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
N, S. (2014). Experimental investigation on hydrodynamic suspension and
mixing time characteristics of jet mixer;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/26035
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
N, Sundaramoorthy. “Experimental investigation on hydrodynamic suspension and
mixing time characteristics of jet mixer;.” 2014. Thesis, Anna University. Accessed April 19, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/26035.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
N, Sundaramoorthy. “Experimental investigation on hydrodynamic suspension and
mixing time characteristics of jet mixer;.” 2014. Web. 19 Apr 2021.
Vancouver:
N S. Experimental investigation on hydrodynamic suspension and
mixing time characteristics of jet mixer;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 19].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26035.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
N S. Experimental investigation on hydrodynamic suspension and
mixing time characteristics of jet mixer;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26035
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Saskatchewan
24.
Martinez Soberanes, Edgar Enrique 1989-.
An Adaptable Single-cell Trapping Device for a Wide Range of Cell Sizes.
Degree: 2016, University of Saskatchewan
URL: http://hdl.handle.net/10388/7505
► In the last two decades many microfluidic devices have been developed in order to provide better and more reliable tools for biological assays and analysis.…
(more)
▼ In the last two decades many microfluidic devices have been developed in order to provide better and more reliable tools for biological assays and analysis. Microfluidic technology has proven its functionality and advantages over conventional cellomics methods such as flow cytometry (FC) and laser scanning cytometry (LSC) in particular for processes that require the analysis of single cells. Different microfluidic platforms capable of capturing, positioning, and sorting single cells have been developed; however, such devices are incapable of working with various sizes of cells. Therefore, once a device has been designed and fabricated it is not possible to modify its dimensions so a new device is required for each different cell size for analysis. In an effort to overcome the limitation of adaptability of microfluidic cell trapping devices, this thesis presents a new microfluidic single cell-trapping device capable of capturing cells of various diameters.
This thesis conducts a review and analysis of several microfluidic cell trapping devices under the FCBPSS (function-context-behavior-principle-state-structure) framework to have a better understanding and classification of the most relevant microfluidic devices, followed by the design of a new device capable of trapping large batches of single cells and modifying its physical features in order to work with multiple sizes of cells. The design process of the new device is based on and guided by the Axiomatic Design Theory. From the thorough review of the literature, it was concluded that the most suitable structure to demonstrate the concept proposed on this thesis an array of single cell trappers, and the best tuning method would be a mechanical stretching to generate a uniform distributed strain on the device.
After designing and modeling the new device, it was imperative for this research to fabricate a device which could be tested in accordance with the literature. The final device consists of two thin layers of polydimethylsiloxane (PDMS), one of which bears trapezoidal microstructures (traps) to physically capture cells. The size of the traps can be modified by stretching the device via a uniform distributed force, which is applied using a stretching apparatus.
Finally, the performance of the new device was assessed by conducting two main experiments. The first experiment consisted of characterizing the mechanical behavior of the device when different strains were applied. It has been found that all the traps of the device have a uniform deformation when a strain is applied, and the minimum size increment permitted by the stretching apparatus is of 2μm.The second experiment was done in order to characterize the hydrodynamical and trapping behavior of the device. By using water-in-oil microspheres of various sizes the trapping of particles was demonstrated; it was determined that the device can capture particles between 20μm and 30μm. To demonstrate cell viability, the device was tested using melanoma cells. No visible damage onto the cells was observed after…
Advisors/Committee Members: Zhang, Chris, Badea, Ildiko, Yang, Qiaoqin, Szpunar, Jerzy A, Deters, Ralph.
Subjects/Keywords: Microfluidics; Hydrodynamic; Single-cell; Trapping; Adaptable
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Martinez Soberanes, E. E. 1. (2016). An Adaptable Single-cell Trapping Device for a Wide Range of Cell Sizes. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/7505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Martinez Soberanes, Edgar Enrique 1989-. “An Adaptable Single-cell Trapping Device for a Wide Range of Cell Sizes.” 2016. Thesis, University of Saskatchewan. Accessed April 19, 2021.
http://hdl.handle.net/10388/7505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Martinez Soberanes, Edgar Enrique 1989-. “An Adaptable Single-cell Trapping Device for a Wide Range of Cell Sizes.” 2016. Web. 19 Apr 2021.
Vancouver:
Martinez Soberanes EE1. An Adaptable Single-cell Trapping Device for a Wide Range of Cell Sizes. [Internet] [Thesis]. University of Saskatchewan; 2016. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/10388/7505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Martinez Soberanes EE1. An Adaptable Single-cell Trapping Device for a Wide Range of Cell Sizes. [Thesis]. University of Saskatchewan; 2016. Available from: http://hdl.handle.net/10388/7505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University
25.
Mishra, Aashwin A.
The Art and Science in Modeling the Pressure-Velocity Interactions.
Degree: PhD, Aerospace Engineering, 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/153358
► The objective of this investigation is to develop a single point model for the global effects of pressure in turbulence, while striking a judicious balance…
(more)
▼ The objective of this investigation is to develop a single point model for the global effects of pressure in turbulence, while striking a judicious balance between mathematical rigor and empiricism. In this vein, we perform a linear stability analysis of planar quadratic flows to isolate and identify the action of pressure herein. This leads to the identification of the statistically most likely behavior engendered by modal ensembles. Thence, we develop a framework to augment the classical realizability constraints. Herein, we ensure that not only is the statistical state physically permissible, but the stochastic process is realizable as well. These process realizability conditions are applied a posteriori, to evaluate the dynamics predicted by established models and a priori, to develop illustrative models that maximize realizability adherence. This serves to identify the range of possible dynamics of the system. Thence, a set of studied compromises are introduced in the scope and framework of the classical modeling procedure to develop a modeling framework that ensures a high degree of fidelity along with adherence to process realizability. An illustrative model using this paradigm is constructed and its predictions are compared against numerical and experimental data, while being contrasted against established closures. The robustness of the linear analysis is tested via stochastic modeling using a Langevin equation based model. Finally, to extend this paradigm to all homogeneous flows, we carry out a linear stability analysis of general three-dimensional homogeneous flows.
Advisors/Committee Members: Girimaji, Sharath S (advisor), Saric, William (committee member), Chakravorty, Suman (committee member), Medina-Cetina, Zenon (committee member).
Subjects/Keywords: Fluid Mechanics; Turbulence Theory; Hydrodynamic Stability
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mishra, A. A. (2014). The Art and Science in Modeling the Pressure-Velocity Interactions. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153358
Chicago Manual of Style (16th Edition):
Mishra, Aashwin A. “The Art and Science in Modeling the Pressure-Velocity Interactions.” 2014. Doctoral Dissertation, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/153358.
MLA Handbook (7th Edition):
Mishra, Aashwin A. “The Art and Science in Modeling the Pressure-Velocity Interactions.” 2014. Web. 19 Apr 2021.
Vancouver:
Mishra AA. The Art and Science in Modeling the Pressure-Velocity Interactions. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/153358.
Council of Science Editors:
Mishra AA. The Art and Science in Modeling the Pressure-Velocity Interactions. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153358

Texas A&M University
26.
Batra, Jaskirat Singh.
Advanced 3D Printing to Fabricate Microfluidic Devices for Cancer and Stem Cells Co-culture Study in Space.
Degree: MS, Electrical Engineering, 2015, Texas A&M University
URL: http://hdl.handle.net/1969.1/166561
► Two different type of microfluidic devices were designed, fabricated and tested to capture the microspheres. The passive device seems to be more reliable because of…
(more)
▼ Two different type of microfluidic devices were designed, fabricated and tested to capture the microspheres. The passive device seems to be more reliable because of no possibility of damage, whereas the thin film in active device got ruptured when too much pressure was applied to the valve control layer.
The passive design was able to capture microspheres of different sizes. Majority of microspheres captured were between 150-175 microns. The capture efficiency for this device was slightly lower than expected at 26%. This was found to be due to the long channel length which leads to pressure drop towards the end of the channel. In addition, capturing of microspheres causes high resistance to flow towards the end of channel. To the best of my knowledge, this is a first kind of device to capture microspheres at this size range of 125-215 microns. The proof of concept for capturing large particle size >100um and broad size distribution has been demonstrated. The device will be further improved by optimizing the dimensions.
Advisors/Committee Members: Kameoka, Jun (advisor), Su, Chin B. (committee member), Entesari, Kamran (committee member), Chu, Kung-Hui (committee member).
Subjects/Keywords: Microfluidics; 3D printing; Microfabrication; Hydrodynamic trapping
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Batra, J. S. (2015). Advanced 3D Printing to Fabricate Microfluidic Devices for Cancer and Stem Cells Co-culture Study in Space. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/166561
Chicago Manual of Style (16th Edition):
Batra, Jaskirat Singh. “Advanced 3D Printing to Fabricate Microfluidic Devices for Cancer and Stem Cells Co-culture Study in Space.” 2015. Masters Thesis, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/166561.
MLA Handbook (7th Edition):
Batra, Jaskirat Singh. “Advanced 3D Printing to Fabricate Microfluidic Devices for Cancer and Stem Cells Co-culture Study in Space.” 2015. Web. 19 Apr 2021.
Vancouver:
Batra JS. Advanced 3D Printing to Fabricate Microfluidic Devices for Cancer and Stem Cells Co-culture Study in Space. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/166561.
Council of Science Editors:
Batra JS. Advanced 3D Printing to Fabricate Microfluidic Devices for Cancer and Stem Cells Co-culture Study in Space. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/166561

Texas A&M University
27.
Cable, Travis Alexander.
Analysis of Oil Lubricated Thrust Collars for Application in Integrally Geared Compressors.
Degree: MS, Mechanical Engineering, 2015, Texas A&M University
URL: http://hdl.handle.net/1969.1/155555
► Integrally geared compressors (IGCs) comprise of single stage impellers installed on the ends of pinion shafts, all driven by a main bull gear (BG) and…
(more)
▼ Integrally geared compressors (IGCs) comprise of single stage impellers installed on the ends of pinion shafts, all driven by a main bull gear (BG) and shaft system. When compared to single shaft multistage centrifugal compressors, the benefits of IGCs include better thermal efficiency, reduced footprint and simple foundation, dispensing with a high speed coupling, as well as better access for maintenance and overhauls. In IGCs the compression of the process gas induces axial loads on the pinion shafts that are transmitted via thrust collars (TCs) to the main drive shaft and balanced by a single thrust bearing. The TCs, located on either side of pinion gears, slightly overlap with the BG outer diameter to form lentil-shaped lubricant-wetted regions.
A numerical model, based on classical thin film lubrication theory, predicts the force response of lubricated thrust collars for use in integrally geared compressors. The predictive model determines performance parameters such as lubricant flow rate, mechanical power loss, peak pressure, lubricant temperature rise, as well as rotordynamic stiffness and damping coefficients for a lubricated TC and bull gear pair. A Newton-Raphson based iterative procedure determines an equilibrium operating position for a given set of TC and BG operating conditions and geometry. Periodic, dynamic displacements from the equilibrium position renders complex dynamic stiffnesses (H = K+iωC), from which the fluid film force and moment stiffness and damping coefficients are determined.
In a lubricated thrust collar and bull gear, a
hydrodynamic pressure builds in the lower half of the lubricated zone and lubricant cavitation occurs in the upper half. The minimum film thickness and peak pressure in the lubricated zone shift location due to the difference in taper angles between the TC and BG surfaces.
For a given applied load, a study on the differences in taper angle between the TC and BG surfaces reveals that current angular tolerances of ±0.1 produce TC/BG pairs with similar performance parameters (power loss, lubricant temperature rise, etc.) and dynamic force and moment stiffness and damping coefficients. Increasing the taper angles of both the TC and BG decreases mechanical power loss and lubricant temperature rise, but also decreases the fluid film axial stiffness and damping coefficients. In addition, static angular misalignments of the TC and BG about the horizontal (x) axis joining the BG and TC centers alters the shape and extent of the lubricant cavitation region. This change alters the load carrying capacity and mechanical power losses of the lubricated element.
For the specific TC/BG pair investigated herein, there exists a maximum difference between the two taper angles for which the mechanical element can support an imposed thrust load. Increasing the speed of the BG (and proportionally the TC speed) increases the mechanical power loss and lubricant temperature rise and decreases the fluid film axial stiffness and damping coefficients. As with most fluid film bearings,…
Advisors/Committee Members: San Andres, Luis (advisor), Childs, Dara (committee member), Strouboulis, Theofanis (committee member).
Subjects/Keywords: Integrally geared compressor; thrust collar; hydrodynamic lubrication
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cable, T. A. (2015). Analysis of Oil Lubricated Thrust Collars for Application in Integrally Geared Compressors. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155555
Chicago Manual of Style (16th Edition):
Cable, Travis Alexander. “Analysis of Oil Lubricated Thrust Collars for Application in Integrally Geared Compressors.” 2015. Masters Thesis, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/155555.
MLA Handbook (7th Edition):
Cable, Travis Alexander. “Analysis of Oil Lubricated Thrust Collars for Application in Integrally Geared Compressors.” 2015. Web. 19 Apr 2021.
Vancouver:
Cable TA. Analysis of Oil Lubricated Thrust Collars for Application in Integrally Geared Compressors. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/155555.
Council of Science Editors:
Cable TA. Analysis of Oil Lubricated Thrust Collars for Application in Integrally Geared Compressors. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155555

Penn State University
28.
Yan, Yan.
A Thermal Hydrodynamic Lubrication Model of Pivoted Plane-Pad Thrust Bearings
.
Degree: 2011, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/11555
► This thesis develops an analytical model for the study of oil-lubricated plane-pad slider bearings with thermal effect. The effects of viscosity changes in the lubricant…
(more)
▼ This thesis develops an analytical model for the study of oil-lubricated plane-pad slider bearings with thermal effect. The effects of viscosity changes in the lubricant with temperature are taken into account. The performance of the slider bearing system can be determined by reference to three dimensionless design parameters: length-to-width ratio (B/L), bearing load parameter (w_th) and the pivot location (X_C) of the bearing pad.
The relationships between the performance variables and the design parameters are analyzed. The analysis suggests that centrally pivoted bearings can develop significant
hydrodynamic lubrication load capacity when the bearing pad is sufficiently wide such as a length-to-width ratio (B/L) of 1 or less. The results show that the load capacity is reduced as the bearing pad narrows and the reduction becomes steep for bearings of B/L>1. At B/L=2, the reduction has become pronounced and the load capacity of the bearing is diminished. In addition, the analysis reveals that the lubricant film thickness in the bearing is relatively insensitive to the applied load when the bearing pad is sufficiently wide such as B/L<1. As the bearing pad narrows, however, the film thickness becomes increasingly sensitive and the sensitivity becomes large at B/L=2, making it very difficult to design centrally pivoted narrow bearings.
The model is then used to study off-centrally pivoted bearings, and design charts are given for such bearings. The relationships between film thickness, friction coefficient, and pivot location are studied under various combinations of load parameters and length-to-width ratios.
The results obtained from the model are compared to numerical results in the published literature. The validity and accuracy of the model may be evaluated by numerical analysis and by performing experiments on actual slider bearings in future work.
Advisors/Committee Members: Liming Chang, Thesis Advisor/Co-Advisor, Liming Chang, Thesis Advisor/Co-Advisor.
Subjects/Keywords: thermal; hydrodynamic lubrication; pivoted slider bearing
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yan, Y. (2011). A Thermal Hydrodynamic Lubrication Model of Pivoted Plane-Pad Thrust Bearings
. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/11555
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yan, Yan. “A Thermal Hydrodynamic Lubrication Model of Pivoted Plane-Pad Thrust Bearings
.” 2011. Thesis, Penn State University. Accessed April 19, 2021.
https://submit-etda.libraries.psu.edu/catalog/11555.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yan, Yan. “A Thermal Hydrodynamic Lubrication Model of Pivoted Plane-Pad Thrust Bearings
.” 2011. Web. 19 Apr 2021.
Vancouver:
Yan Y. A Thermal Hydrodynamic Lubrication Model of Pivoted Plane-Pad Thrust Bearings
. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Apr 19].
Available from: https://submit-etda.libraries.psu.edu/catalog/11555.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yan Y. A Thermal Hydrodynamic Lubrication Model of Pivoted Plane-Pad Thrust Bearings
. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/11555
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas Tech University
29.
-0262-1751.
The Impact of viscosity on two-phase gas-liquid slug flow hydrodynamics.
Degree: MSin Petroleum Engineering, Petroleum Engineering, 2018, Texas Tech University
URL: http://hdl.handle.net/2346/82070
► The impact of high viscosity on multiphase slug flow hydrodynamic closure relationship is examined experimentally in a horizontal pipe. The obvious differences observed between existing…
(more)
▼ The impact of high viscosity on multiphase slug flow
hydrodynamic closure relationship is examined experimentally in a horizontal pipe. The obvious differences observed between existing low viscosity closure relationships and high viscosity fluid closure relationships are discussed. The experiment was performed on a flow loop with test section of 0.0381-m ID and 6-m long clear acrylic visualization section. Superficial liquid and gas velocities vary from 0.342-m/s to 0.718-m/s and 0.532-m/s to 1.397-m/s respectively for nominal oil viscosities of 150 cP and 280 cP at inclinations of 0° and +5° from horizontal. The experimental results are used to evaluate the existing models for flow pattern and
hydrodynamic predictions. The results obtained for the
hydrodynamic parameters are reported and compared to existing closure relationships developed for high viscosity fluids. A modification was applied to Taitel and Barnea’s model for slug flow and the results were validated by comparing the experimental results to existing mechanistic model (original Taitel and Barnea’s model).
Advisors/Committee Members: Panacharoensawad, Ekarit (advisor), Bullard, Denny (committee member), Lloyd , Heinze (committee member).
Subjects/Keywords: hydrodynamic; flow pattern; high viscosity; multiphase flow
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
-0262-1751. (2018). The Impact of viscosity on two-phase gas-liquid slug flow hydrodynamics. (Masters Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/82070
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-0262-1751. “The Impact of viscosity on two-phase gas-liquid slug flow hydrodynamics.” 2018. Masters Thesis, Texas Tech University. Accessed April 19, 2021.
http://hdl.handle.net/2346/82070.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-0262-1751. “The Impact of viscosity on two-phase gas-liquid slug flow hydrodynamics.” 2018. Web. 19 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-0262-1751. The Impact of viscosity on two-phase gas-liquid slug flow hydrodynamics. [Internet] [Masters thesis]. Texas Tech University; 2018. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/2346/82070.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-0262-1751. The Impact of viscosity on two-phase gas-liquid slug flow hydrodynamics. [Masters Thesis]. Texas Tech University; 2018. Available from: http://hdl.handle.net/2346/82070
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Author name may be incomplete

University of KwaZulu-Natal
30.
Singh, Nalendran.
The hydrodynamic design and analysis of a liquid oxygen pump impeller for a rocket engine.
Degree: 2018, University of KwaZulu-Natal
URL: https://researchspace.ukzn.ac.za/handle/10413/17549
► The deployment of micro- and nanosatellites has greatly increased over the past few decades with advances in miniaturized electronics for communication, imaging and attitude control.…
(more)
▼ The deployment of micro- and nanosatellites has greatly increased over the past few decades with
advances in miniaturized electronics for communication, imaging and attitude control. The South
African satellite industry is now also currently developing two microsatellites and nanosatellites
for launch by foreign providers. The outsourcing of launch services to foreign providers is costly
and can lead to unanticipated delays. In this context, the UKZN Aerospace Systems Research
Group (ASReG), in conjunction with the Council for Scientific and Industrial Research (CSIR)
has begun designing a modular and compact liquid propulsion engine (LOX/RP-1) named
SAFFIRE (South AFrican First Integrated Rocket Engine).
This dissertation details the design and analysis of the liquid oxygen pump that delivers the
oxidiser to the SAFFIRE combustion chamber at high pressure, where the propellants are burnt
and expelled, generating thrust. The pump is electrically powered as opposed to the conventional
turbine-driven turbopump, to further simplify start-stop procedures and reduce the complexity of
the engine. The pump’s operating conditions were determined by an engine performance analysis,
with these results forming the initial conditions for the pump design process. The oxidiser pump
is required to deliver a mass flow rate of 6.13 kg/s at a pressure of 62.8 bar.
The pump was designed using conventional centrifugal pump design procedures, with special
considerations taken due to the working temperature of liquid oxygen being -183°C. The final
one-dimensional design for the impeller was developed using the commercial software
PUMPAL™, which was provided by the CSIR. A 3D impeller geometry was developed by
importing the one-dimensional design into AxCent™, where quasi-3D Multiple Stream Tube
(MST) analysis and full 3D computational fluid dynamics (CFD) simulations were performed.
The impeller design was refined multiple times until the parameters set by the engine performance
analysis were met. The AxCent™ analyses determined that low-pressure zones occurred at the
inlet of the pump impeller. Hence Star-CCM+™, which has a more robust computational solver
and allows for a full transient, multiphase CFD to be performed, was employed to analyse any
potential cavitation affects. The results from Star-CCM+™ and AxCent™ were compared and
designs altered until a final design was realized that met the prescribed performance parameters.
The final pump impeller has an outer diameter of 86 mm, delivering a mass flow rate of 6.13 kg/s
at a pressure of 64.2 bar. The pump operates at an efficiency of 60.8% requiring a power input of
51.96 kW at a rotational speed of 26000 rpm.
Advisors/Committee Members: Brooks, Michael John. (advisor), Smith, Graham Douglas James. (advisor), Snedden, Glen Campbell. (advisor).
Subjects/Keywords: Hydrodynamic.; Liquid oxygen.; Impeller.; Rocket engine.
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APA (6th Edition):
Singh, N. (2018). The hydrodynamic design and analysis of a liquid oxygen pump impeller for a rocket engine. (Thesis). University of KwaZulu-Natal. Retrieved from https://researchspace.ukzn.ac.za/handle/10413/17549
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Singh, Nalendran. “The hydrodynamic design and analysis of a liquid oxygen pump impeller for a rocket engine.” 2018. Thesis, University of KwaZulu-Natal. Accessed April 19, 2021.
https://researchspace.ukzn.ac.za/handle/10413/17549.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Singh, Nalendran. “The hydrodynamic design and analysis of a liquid oxygen pump impeller for a rocket engine.” 2018. Web. 19 Apr 2021.
Vancouver:
Singh N. The hydrodynamic design and analysis of a liquid oxygen pump impeller for a rocket engine. [Internet] [Thesis]. University of KwaZulu-Natal; 2018. [cited 2021 Apr 19].
Available from: https://researchspace.ukzn.ac.za/handle/10413/17549.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Singh N. The hydrodynamic design and analysis of a liquid oxygen pump impeller for a rocket engine. [Thesis]. University of KwaZulu-Natal; 2018. Available from: https://researchspace.ukzn.ac.za/handle/10413/17549
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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