subject:(Computational Fluid Mechanics)

Rice University

1. Zhang, Yutong. Computational Flow Analysis of a Cyclone Vacuum Cleaner.

Degree: MS, Mechanical Engineering, 2019, Rice University

URL: http://hdl.handle.net/1911/105403

► Computational flow analysis of a cyclone vacuum cleaner can provide valuable fluid mechanics information for efficient design and operation. The vacuum cleaner is made of… (more)

Subjects/Keywords: Fluid Mechanics; Computational Fluid Mechanics

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APA (6^th Edition):

Zhang, Y. (2019). Computational Flow Analysis of a Cyclone Vacuum Cleaner. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/105403

Chicago Manual of Style (16^th Edition):

Zhang, Yutong. “Computational Flow Analysis of a Cyclone Vacuum Cleaner.” 2019. Masters Thesis, Rice University. Accessed April 07, 2020. http://hdl.handle.net/1911/105403.

MLA Handbook (7^th Edition):

Zhang, Yutong. “Computational Flow Analysis of a Cyclone Vacuum Cleaner.” 2019. Web. 07 Apr 2020.

Vancouver:

Zhang Y. Computational Flow Analysis of a Cyclone Vacuum Cleaner. [Internet] [Masters thesis]. Rice University; 2019. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/1911/105403.

Council of Science Editors:

Zhang Y. Computational Flow Analysis of a Cyclone Vacuum Cleaner. [Masters Thesis]. Rice University; 2019. Available from: http://hdl.handle.net/1911/105403

2. Nagai, Toshiki. Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems.

Degree: 2018, University of Colorado at Boulder

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10844711

► This thesis presents a space-time extended finite element method (space-time XFEM) based on the Heaviside enrichment for transient problems with moving interfaces, and its… (more)

▼ This thesis presents a space-time extended finite element method (space-time XFEM) based on the Heaviside enrichment for transient problems with moving interfaces, and its applications to the fluid-structure interaction (FSI) analysis. The Heaviside-enriched XFEM is a promising method to discretize partial differential equations with discontinuities in space. However, significant approximation errors are introduced by time stepping schemes when the interface geometry changes in time. The proposed space-time XFEM applies the finite element discretization and the Heaviside enrichment in both space and time with elements forming a space-time slab. A simple space-time scheme is introduced to integrate the weak form of the governing equations. This scheme considers spatial intersection configuration at multiple temporal integration points. Standard spatial integration techniques can be applied for each spatial configuration. Nitsche's method and the face-oriented ghost-penalty method are extended to the proposed space-time XFEM formulation. The stability, accuracy and flexibility of the space-time XFEM for various interface conditions including moving interfaces are demonstrated with structural and fluid problems. Moreover, the space-time XFEM enables analyzing complex FSI problems using moving interfaces, such as FSI with contact. Two FSI methods using moving interfaces (full-Eulerian FSI and Lagrangian-immersed FSI) are studied. The Lagrangian-immersed FSI method is a mixed formulation of Lagrangian and Eulerian descriptions. As solid and fluid meshes are independently defined, the FSI is computed between non-matching interfaces based on Nitsche's method and projection techniques adopted from computational contact mechanics. The stabilized Lagrange multiplier method is used for contact. Numerical examples of FSI and FSI-contact problems provide insight into the characteristics of the combination of the space-time XFEM and the Lagrangian-immersed FSI method. The proposed combination is a promising method which has the versatility for various multi-physics simulations and the applicability such as optimization.

Subjects/Keywords: Fluid mechanics; Computational physics

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APA (6^th Edition):

Nagai, T. (2018). Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems. (Thesis). University of Colorado at Boulder. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10844711

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nagai, Toshiki. “Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems.” 2018. Thesis, University of Colorado at Boulder. Accessed April 07, 2020. http://pqdtopen.proquest.com/#viewpdf?dispub=10844711.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nagai, Toshiki. “Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems.” 2018. Web. 07 Apr 2020.

Vancouver:

Nagai T. Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems. [Internet] [Thesis]. University of Colorado at Boulder; 2018. [cited 2020 Apr 07]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10844711.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nagai T. Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems. [Thesis]. University of Colorado at Boulder; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10844711

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

3. Mallone, Kevin Charles. A more robust wall model for use with the two-equation turbulence model .

Degree: 1995, University of Hertfordshire

URL: http://hdl.handle.net/2299/14149

► The applicability of computational fluid dynamics (CFD) modelling schemes to turbulent wall-bounded flows is a matter of concern. In the near-wall region of bounded flows,… (more)

▼ The applicability of computational fluid dynamics (CFD) modelling schemes to turbulent wall-bounded flows is a matter of concern. In the near-wall region of bounded flows, the standard high Reynolds number k-e model is not valid and requires the use of empirical wall models to mimic the behaviour of this region. A theoretical study of the physics of prevalent wall modelling techniques showed that the velocity distribution took no account of the pressure gradient. To determine the effect of this shortcoming, a typical transient three-dimensional flow was analysed using current CFD methods and the results compared with experimental flow measurements. Consideration of these results showed that the 'traditional' wall model was unable to replicate observed flow features in the near-wall region: further analysis of the computational results confirmed that these poor flow predictions arose from the inability of the model to consider local pressure gradient effects. Consequently, a strong case was made for a more robust wall model for use in conjunction with the standard high Reynolds number k-e model. A number of boundary layer analyses were reviewed and Coles' law of the wake (1956) presented as a viable candidate for the development of a new wall modelling scheme. In theory, Coles' law (1956) provides a description of bounded flows under arbitrary pressure gradients up to the point of near-separation and may be extended to the study of reversed flows. A generic algorithm for Coles' law was prepared and used to study the fundamental test cases of U-bend and backward facing step flows. In a comparison between documented experimentation, 'conventional' CFD modelling and Coles' law models of these flows, the Coles' law model was shown to provide a viable alternative to 'traditional' schemes. Consequently, the Coles' law model of the near-wall region, being valid for pressure-driven flows, offers an extension to the range of flows for which the standard high Reynolds number k-e model may be used.

Subjects/Keywords: Computational fluid mechanics; Fluid mechanics

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APA (6^th Edition):

Mallone, K. C. (1995). A more robust wall model for use with the two-equation turbulence model . (Thesis). University of Hertfordshire. Retrieved from http://hdl.handle.net/2299/14149

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mallone, Kevin Charles. “A more robust wall model for use with the two-equation turbulence model .” 1995. Thesis, University of Hertfordshire. Accessed April 07, 2020. http://hdl.handle.net/2299/14149.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mallone, Kevin Charles. “A more robust wall model for use with the two-equation turbulence model .” 1995. Web. 07 Apr 2020.

Vancouver:

Mallone KC. A more robust wall model for use with the two-equation turbulence model . [Internet] [Thesis]. University of Hertfordshire; 1995. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/2299/14149.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mallone KC. A more robust wall model for use with the two-equation turbulence model . [Thesis]. University of Hertfordshire; 1995. Available from: http://hdl.handle.net/2299/14149

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

4. Capobianco, Vincent J. Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis.

Degree: 2017, California State University, Long Beach

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10639011

► Computational fluid dynamic (CFD) simulations were conducted on a known low aspect ratio wing design as well as four variant designs incorporating Coanda effect… (more)

Subjects/Keywords: Fluid mechanics; Computational physics; Aerospace engineering

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APA (6^th Edition):

Capobianco, V. J. (2017). Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis. (Thesis). California State University, Long Beach. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10639011

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Capobianco, Vincent J. “Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis.” 2017. Thesis, California State University, Long Beach. Accessed April 07, 2020. http://pqdtopen.proquest.com/#viewpdf?dispub=10639011.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Capobianco, Vincent J. “Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis.” 2017. Web. 07 Apr 2020.

Vancouver:

Capobianco VJ. Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis. [Internet] [Thesis]. California State University, Long Beach; 2017. [cited 2020 Apr 07]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10639011.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Capobianco VJ. Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis. [Thesis]. California State University, Long Beach; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10639011

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Embry-Riddle Aeronautical University

5. Ravulapati, Kartheek. Separation Bubbles and Vortex Formation in Cavity Flows.

Degree: MSin Aerospace Engineering, Graduate Studies, 2014, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/edt/179

► This research is a computational fluid dynamic study of the formation of vortices and separation bubbles in a square cavity as well as in… (more)

Subjects/Keywords: Aerodynamics and Fluid Mechanics; Computational Engineering

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APA (6^th Edition):

Ravulapati, K. (2014). Separation Bubbles and Vortex Formation in Cavity Flows. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/edt/179

Chicago Manual of Style (16^th Edition):

Ravulapati, Kartheek. “Separation Bubbles and Vortex Formation in Cavity Flows.” 2014. Masters Thesis, Embry-Riddle Aeronautical University. Accessed April 07, 2020. https://commons.erau.edu/edt/179.

MLA Handbook (7^th Edition):

Ravulapati, Kartheek. “Separation Bubbles and Vortex Formation in Cavity Flows.” 2014. Web. 07 Apr 2020.

Vancouver:

Ravulapati K. Separation Bubbles and Vortex Formation in Cavity Flows. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2014. [cited 2020 Apr 07]. Available from: https://commons.erau.edu/edt/179.

Council of Science Editors:

Ravulapati K. Separation Bubbles and Vortex Formation in Cavity Flows. [Masters Thesis]. Embry-Riddle Aeronautical University; 2014. Available from: https://commons.erau.edu/edt/179

6. Smith, Katherine Margaret. Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean.

Degree: 2018, University of Colorado at Boulder

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10623667

► In this dissertation, Large Eddy Simulations (LES) are used to model the coupled turbulence-reactive tracer dynamics within the upper mixed layer of the ocean.… (more)

▼ In this dissertation, Large Eddy Simulations (LES) are used to model the coupled turbulence-reactive tracer dynamics within the upper mixed layer of the ocean. Prior work has shown that LES works well over the spatial and time scales relevant to both turbulence and reactive biogeochemistry. Additionally, the code intended for use is able to carry an arbitrary number of tracer equations, allowing for easy expansion of the species reactions. Research in this dissertation includes a study of 15 idealized non-reactive tracers within an evolving large-scale temperature front in order determine and understand the fundamental dynamics underlying turbulence-tracer interaction in the absence of reactions. The focus of this study, in particular, was on understanding the evolution of biogeochemically-relevant, non-reactive tracers in the presence of both large (~5 km) submesoscale eddies and smallscale (~100 m) wave-driven Langmuir turbulence. The 15 tracers studied have different initial, boundary, and source conditions and significant differences are seen in their distributions depending on these conditions. Differences are also seen between regions where submesoscale eddies and small-scale Langmuir turbulence are both present, and in regions with only Langmuir turbulence. A second study focuses on the examination of Langmuir turbulence effects on upper ocean carbonate chemistry. Langmuir mixing time scales are similar to those of chemical reactions, resulting in potentially strong tracer-flow coupling effects. The strength of the Langmuir turbulence is varied, from no wave-driven turbulence (i.e., only shear-driven turbulence), to Langmuir turbulence that is much stronger than that found in typical upper ocean conditions. Three different carbonate chemistry models are also used in this study: time-dependent chemistry, equilibrium chemistry, and no-chemistry (i.e., non-reactive tracers). The third and final study described in this dissertation details the development of a reduced-order biogeochemical model with 17 state equations that can accurately reproduce the Bermuda Atlantic Time-series Study (BATS) ecosystem behavior, but that can also be integrated within high-resolution LES.

Subjects/Keywords: Fluid mechanics; Computational physics; Physical oceanography

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APA (6^th Edition):

Smith, K. M. (2018). Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean. (Thesis). University of Colorado at Boulder. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10623667

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Smith, Katherine Margaret. “Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean.” 2018. Thesis, University of Colorado at Boulder. Accessed April 07, 2020. http://pqdtopen.proquest.com/#viewpdf?dispub=10623667.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Smith, Katherine Margaret. “Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean.” 2018. Web. 07 Apr 2020.

Vancouver:

Smith KM. Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean. [Internet] [Thesis]. University of Colorado at Boulder; 2018. [cited 2020 Apr 07]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10623667.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Smith KM. Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean. [Thesis]. University of Colorado at Boulder; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10623667

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

7. Hoskins, Meghan E. Development of a Computational Fluid Dynamics Tool to Explore the Interactions between Cancer Cells and Leukocytes.

Degree: PhD, Bioengineering, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/9260

► A new multidisciplinary computational method has been developed to model the physics of interacting systems of blood and cancer cells. The method is applied to… (more)

Subjects/Keywords: computational fluid dynamics; cell adhesion; neutrophils; melanoma; computational structural mechanics

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APA (6^th Edition):

Hoskins, M. E. (2008). Development of a Computational Fluid Dynamics Tool to Explore the Interactions between Cancer Cells and Leukocytes. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/9260

Chicago Manual of Style (16^th Edition):

Hoskins, Meghan E. “Development of a Computational Fluid Dynamics Tool to Explore the Interactions between Cancer Cells and Leukocytes.” 2008. Doctoral Dissertation, Penn State University. Accessed April 07, 2020. https://etda.libraries.psu.edu/catalog/9260.

MLA Handbook (7^th Edition):

Hoskins, Meghan E. “Development of a Computational Fluid Dynamics Tool to Explore the Interactions between Cancer Cells and Leukocytes.” 2008. Web. 07 Apr 2020.

Vancouver:

Hoskins ME. Development of a Computational Fluid Dynamics Tool to Explore the Interactions between Cancer Cells and Leukocytes. [Internet] [Doctoral dissertation]. Penn State University; 2008. [cited 2020 Apr 07]. Available from: https://etda.libraries.psu.edu/catalog/9260.

Council of Science Editors:

Hoskins ME. Development of a Computational Fluid Dynamics Tool to Explore the Interactions between Cancer Cells and Leukocytes. [Doctoral Dissertation]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/9260

Penn State University

8. Witmer, Kory P. In Vitro and Computational Analysis of the Fluid Mechanics Promoting Thrombus Formation in a Backward-facing Step Flow Domain.

Degree: MS, Bioengineering, 2014, Penn State University

URL: https://etda.libraries.psu.edu/catalog/22673

► The continued development of cardiovascular assist devices is constantly thwarted by the effects of thrombosis. Many of these devices produce regions of stagnant flow or… (more)

▼ The continued development of cardiovascular assist devices is constantly thwarted by the effects of thrombosis. Many of these devices produce regions of stagnant flow or low wall shear stress, making these areas especially prone to clotting. To better understand the process of coagulation in artificial devices, the fluid mechanics that promote stagnant, recirculating flow are studied using a backward-facing step (BFS) model. Using digital surface reconstructions of 15-minute thrombi from previous studies, model thrombi are constructed from polydimethylsiloxane (PDMS), coated with collagen to act as a procoagulant to promote thrombosis, and inserted into the recirculation region of the BFS model. An in vitro flow loop is constructed and whole bovine blood is used to grow thrombi on the surface and downstream from the PDMS models. Flow loop operation is at 0.76 L/min for run times of 15 and 45 minutes, which when added to the 15-minute model produce thrombi of 30 and 60 minute size, respectively. Volume and surface data of formed thrombi are obtained using magnetic resonance imaging. These thrombi are then removed from the model, paraffin embedded, and analyzed histologically through Carstairs’ staining procedure. Surface reconstructions from MRI data are used for steady, computational simulations to analyze flow over and wall shear stresses that develop on thrombi surfaces. Particle image velocimetry (PIV) and laser Doppler velocimetry (LDV) are used to characterize the recirculation zone produced by the BFS model and are compared to simulations performed on an empty BFS model. WSS analysis of PDMS models shows high regions of stress near the location of the step where little thrombus deposition occurs. Deposition is observed to occur on the PDMS model where lower WSS values are present. Small vortices are observed over the surface of these downstream PDMS regions, suggesting that recirculation is necessary for thrombosis even on procoagulant surfaces. The average volume and exposed surface area of thrombi formed in the 30 minute experiments were 0.119 cm3 and 1.24 cm2, respectively, and for the 60 minute experiments were 0.189 cm3 and 1.46 cm2, respectively. Volume and exposed surface area for 30 minute studies from previous work were 0.0765 cm3 and 1.18 cm2, respectively, and for 60 minute studies were 0.103 cm3 and 1.44 cm2 for volume and surface area, respectively. The current results yield higher values of volume and exposed surface area than the previous thrombus studies, but showed more repeatability amongst experiments. The increase in volume and surface area could be due to the presence of the collagen procoagulant on the PDMS surface which enhances platelet activation and thrombosis.

Subjects/Keywords: thrombosis; fluid mechanics; stagnant flow; coagulation; computational fluid dynamics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Witmer, K. P. (2014). In Vitro and Computational Analysis of the Fluid Mechanics Promoting Thrombus Formation in a Backward-facing Step Flow Domain. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/22673

Chicago Manual of Style (16^th Edition):

Witmer, Kory P. “In Vitro and Computational Analysis of the Fluid Mechanics Promoting Thrombus Formation in a Backward-facing Step Flow Domain.” 2014. Masters Thesis, Penn State University. Accessed April 07, 2020. https://etda.libraries.psu.edu/catalog/22673.

MLA Handbook (7^th Edition):

Witmer, Kory P. “In Vitro and Computational Analysis of the Fluid Mechanics Promoting Thrombus Formation in a Backward-facing Step Flow Domain.” 2014. Web. 07 Apr 2020.

Vancouver:

Witmer KP. In Vitro and Computational Analysis of the Fluid Mechanics Promoting Thrombus Formation in a Backward-facing Step Flow Domain. [Internet] [Masters thesis]. Penn State University; 2014. [cited 2020 Apr 07]. Available from: https://etda.libraries.psu.edu/catalog/22673.

Council of Science Editors:

Witmer KP. In Vitro and Computational Analysis of the Fluid Mechanics Promoting Thrombus Formation in a Backward-facing Step Flow Domain. [Masters Thesis]. Penn State University; 2014. Available from: https://etda.libraries.psu.edu/catalog/22673

University of California – San Diego

9. Chongsiripinyo, Karu. Decay of stratified turbulent wakes behind a bluff body.

Degree: Mechanical and Aerospace Engineering, 2019, University of California – San Diego

URL: http://www.escholarship.org/uc/item/4505g7nr

► The dissertation investigates buoyancy effects in turbulent bluff-body wakes that evolve in stratified fluids. The investigation utilizes high-resolution numerical simulations and employs a body-inclusive approach… (more)

▼ The dissertation investigates buoyancy effects in turbulent bluff-body wakes that evolve in stratified fluids. The investigation utilizes high-resolution numerical simulations and employs a body-inclusive approach to describe the flow from the body into the far wake unlike the usual temporal-model approximation of most prior stratified-wake simulations. The dissertation is composed of three main parts. The first part focuses on the dynamics of vorticity that accounts for the unexpected regeneration and increase of turbulence in the near-to-intermediate wake when stratification increases in the regime of low body Froude numbers. The second part characterizes buoyancy effects on the evolution of turbulent kinetic energy in a sphere wake at moderate Froude number and an intermediate Reynolds number. The third part concerns the decay of a disk wake at relatively high Reynolds number and a wide range of Froude numbers, constitutes the major contribution of this thesis, and is summarized below.Large-eddy simulations (LES) of flow past a disk are performed at Re = UbLb/ν = 50,000 and at Fr = Ub/NLb = ∞,50,10,2; Ub is the free-stream velocity, Lb is the disk diameter, ν is the fluid kinematic viscosity, and N is the buoyancy frequency.In the axisymmetric wake in a homogeneous fluid, it is found that the mean streamwise velocity deficit (U0) decays in two stages; U0 ∝ x−0.9 during 10 < x/Lb < 65 followed by U0 ∝∼ x−2/3. Consequently, none of the simulated stratified wakes is able to exhibit the classical 2/3 decay exponent of U0 in the interval before buoyancy effects set in. The turbulent characteristic velocity, taken as K1/2 with K the turbulent kinetic energy (TKE), satisfies K1/2 ∝∼ x−2/3 after x/Lb ≈ 10. Turbulent wakes are affected by stratification within approximately one buoyancy time scale (Ntb ≈ 1) after which, provided that RehFrh2 ≥ 1, we find 3 regimes: weakly stratified turbulence (WST), intermediately stratified turbulence (IST), and strongly stratified turbulence (SST). The regime boundaries are delineated by the turbulent horizontal Froude number Frh = u′h/NLHk; here, u′h and LHk are r.m.s horizontal velocity and TKE- based horizontal wake width. WST begins when Frh decreases to O(1), spans 1 < Ntb < 5 and, while the mean flow is strongly affected by buoyancy in WST, turbulence is not. Thus, while the mean flow transitions into the so-called non-equilibrium (NEQ) regime, turbulence remains approximately isotropic in WST. The next stage of IST, identified by progressively increasing turbulence anisotropy, commences at N tb ≈ 5 once F rh decreases to O(0.1). During IST, the mean flow has arrived into the NEQ regime with a constant decay exponent, U0 ∝ x−0.18, but turbulence is still in transition. The exponent of 0.18 for the disk wake is smaller than the approximately 0.25 exponent found for the stratified sphere wake. When F rh decreases by another order of magnitude to F rh ∼ O(0.01), the wake transitions into the third regime of SST that is identified based on the asymptote of turbulent vertical Froude…

Subjects/Keywords: Fluid mechanics; Computational Fluid Dynamics; Decay; Scaling; Stratification; Turbulence; Wake

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APA (6^th Edition):

Chongsiripinyo, K. (2019). Decay of stratified turbulent wakes behind a bluff body. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/4505g7nr

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chongsiripinyo, Karu. “Decay of stratified turbulent wakes behind a bluff body.” 2019. Thesis, University of California – San Diego. Accessed April 07, 2020. http://www.escholarship.org/uc/item/4505g7nr.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chongsiripinyo, Karu. “Decay of stratified turbulent wakes behind a bluff body.” 2019. Web. 07 Apr 2020.

Vancouver:

Chongsiripinyo K. Decay of stratified turbulent wakes behind a bluff body. [Internet] [Thesis]. University of California – San Diego; 2019. [cited 2020 Apr 07]. Available from: http://www.escholarship.org/uc/item/4505g7nr.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chongsiripinyo K. Decay of stratified turbulent wakes behind a bluff body. [Thesis]. University of California – San Diego; 2019. Available from: http://www.escholarship.org/uc/item/4505g7nr

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Windsor

10. Shademan, Mehrdad. CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer.

Degree: PhD, Mechanical, Automotive, and Materials Engineering, 2015, University of Windsor

URL: http://scholar.uwindsor.ca/etd/5700

► Circular jets impinging vertically on flat surfaces have many practical applications in industry. Nozzle height-to-diameter ratio plays an important role in the performance of this… (more)

▼ Circular jets impinging vertically on flat surfaces have many practical applications in industry. Nozzle height-to-diameter ratio plays an important role in the performance of this type of jet. In this thesis a step by step approach has been followed to cover different aspects of impinging jets. In the first step, a steady Reynolds-Averaged Navier-Stokes simulation has been carried out on impinging jets with different nozzle stand-off distances. A strong dependency of the jet characteristics on the nozzle height-to-diameter ratio was observed. The simulations show that an increase in this ratio results in larger shear stress and more distributed pressure on the wall. In the second step, an unsteady simulation using Large Eddy Simulation has been performed on an impinging jet with large stand-off distance. Good agreement was observed between the mean value results obtained from the current simulations and experiments. Unlike impinging jets with small stand-off distance, where the ring-like vortices keep their interconnected shape upon reaching the plate, no sign of interconnection was observed on the plate for the large stand-off distance case. A large deflection of the jet stagnation streamline was observed in comparison to the cases with small nozzle height-to-diameter ratios. Large fluctuations of the unsteady wall shear stresses were also captured. A boiling model was developed for impinging jets with heat transfer. An Eulerian-Eulerian two-phase flow model was implemented using an open source code for the simulation (OpenFOAM). Initially, an adiabatic two-phase model was developed for flow in a pipe. Following this, the energy equation was activated to account for non-adiabatic and boiling conditions. The simulation predictions were found to be in reasonable agreement with the experimental data and show significant improvement over previous numerical results. Finally, the model was upgraded for an impinging jet flow by implementing new correlations. The results obtained from the current model show reasonable agreement with the experimental results. The model can be confidently used for the evaluation of adiabatic and non-adiabatic impinging jet flows. Advisors/Committee Members: Ronald M Barron, Ramaswami Balachandar.

Subjects/Keywords: computational fluid dynamics; fluid mechanics; impinging jet; turbulence modelling; Mechanical Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shademan, M. (2015). CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer. (Doctoral Dissertation). University of Windsor. Retrieved from http://scholar.uwindsor.ca/etd/5700

Chicago Manual of Style (16^th Edition):

Shademan, Mehrdad. “CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer.” 2015. Doctoral Dissertation, University of Windsor. Accessed April 07, 2020. http://scholar.uwindsor.ca/etd/5700.

MLA Handbook (7^th Edition):

Shademan, Mehrdad. “CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer.” 2015. Web. 07 Apr 2020.

Vancouver:

Shademan M. CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer. [Internet] [Doctoral dissertation]. University of Windsor; 2015. [cited 2020 Apr 07]. Available from: http://scholar.uwindsor.ca/etd/5700.

Council of Science Editors:

Shademan M. CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer. [Doctoral Dissertation]. University of Windsor; 2015. Available from: http://scholar.uwindsor.ca/etd/5700

Colorado School of Mines

11. Nguyen, Richard T. Coupling complex microchannel heat exchanger CFD with plug flow and Poiseuille flow models.

Degree: MS(M.S.), Mechanical Engineering, 2016, Colorado School of Mines

URL: http://hdl.handle.net/11124/170151

► Microchannel heat exchanger simulation provides a means to obtain design predictions at low cost and quick turnaround. Using computational fluid dynamics to solve the conjugate… (more)

Subjects/Keywords: ANSYS Fluent; Computational fluid dynamics; Fluid mechanics; Microchannel heat exchanger; Modeling

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APA (6^th Edition):

Nguyen, R. T. (2016). Coupling complex microchannel heat exchanger CFD with plug flow and Poiseuille flow models. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/170151

Chicago Manual of Style (16^th Edition):

Nguyen, Richard T. “Coupling complex microchannel heat exchanger CFD with plug flow and Poiseuille flow models.” 2016. Masters Thesis, Colorado School of Mines. Accessed April 07, 2020. http://hdl.handle.net/11124/170151.

MLA Handbook (7^th Edition):

Nguyen, Richard T. “Coupling complex microchannel heat exchanger CFD with plug flow and Poiseuille flow models.” 2016. Web. 07 Apr 2020.

Vancouver:

Nguyen RT. Coupling complex microchannel heat exchanger CFD with plug flow and Poiseuille flow models. [Internet] [Masters thesis]. Colorado School of Mines; 2016. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/11124/170151.

Council of Science Editors:

Nguyen RT. Coupling complex microchannel heat exchanger CFD with plug flow and Poiseuille flow models. [Masters Thesis]. Colorado School of Mines; 2016. Available from: http://hdl.handle.net/11124/170151

12. Gopalakrishnan, Shivasubramanian. Modeling of Thermal Non-Equilibrium in Superheated Injector Flows.

Degree: PhD, Mechanical Engineering, 2010, U of Massachusetts : PhD

URL: https://scholarworks.umass.edu/open_access_dissertations/185

► Among the many factors that effect the atomization of a fuel spray in a com- bustion chamber, the flow characteristics of the fuel inside the… (more)

Subjects/Keywords: Computational Fluid Dynamics; Fluid Mechanics; Multiphase Flows; Mechanical Engineering

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APA (6^th Edition):

Gopalakrishnan, S. (2010). Modeling of Thermal Non-Equilibrium in Superheated Injector Flows. (Doctoral Dissertation). U of Massachusetts : PhD. Retrieved from https://scholarworks.umass.edu/open_access_dissertations/185

Chicago Manual of Style (16^th Edition):

Gopalakrishnan, Shivasubramanian. “Modeling of Thermal Non-Equilibrium in Superheated Injector Flows.” 2010. Doctoral Dissertation, U of Massachusetts : PhD. Accessed April 07, 2020. https://scholarworks.umass.edu/open_access_dissertations/185.

MLA Handbook (7^th Edition):

Gopalakrishnan, Shivasubramanian. “Modeling of Thermal Non-Equilibrium in Superheated Injector Flows.” 2010. Web. 07 Apr 2020.

Vancouver:

Gopalakrishnan S. Modeling of Thermal Non-Equilibrium in Superheated Injector Flows. [Internet] [Doctoral dissertation]. U of Massachusetts : PhD; 2010. [cited 2020 Apr 07]. Available from: https://scholarworks.umass.edu/open_access_dissertations/185.

Council of Science Editors:

Gopalakrishnan S. Modeling of Thermal Non-Equilibrium in Superheated Injector Flows. [Doctoral Dissertation]. U of Massachusetts : PhD; 2010. Available from: https://scholarworks.umass.edu/open_access_dissertations/185

Georgia Tech

13. Tang, Tsz Ling Elaine. EFFECT OF GEOMETRY, RESPIRATION AND VESSEL DEFORMABILITY ON FONTAN HEMODYNAMICS: A NUMERICAL INVESTIGATION.

Degree: PhD, Chemical and Biomolecular Engineering, 2015, Georgia Tech

URL: http://hdl.handle.net/1853/56206

► Single ventricle (SV) congenital heart defects occur in 2 of every 1000 live births in the US. The Fontan procedure, the common palliation of single… (more)

Subjects/Keywords: Congenital heart disease; Fluid mechanics; Computational fluid dynamics; Pediatric cardiology

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APA (6^th Edition):

Tang, T. L. E. (2015). EFFECT OF GEOMETRY, RESPIRATION AND VESSEL DEFORMABILITY ON FONTAN HEMODYNAMICS: A NUMERICAL INVESTIGATION. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/56206

Chicago Manual of Style (16^th Edition):

Tang, Tsz Ling Elaine. “EFFECT OF GEOMETRY, RESPIRATION AND VESSEL DEFORMABILITY ON FONTAN HEMODYNAMICS: A NUMERICAL INVESTIGATION.” 2015. Doctoral Dissertation, Georgia Tech. Accessed April 07, 2020. http://hdl.handle.net/1853/56206.

MLA Handbook (7^th Edition):

Tang, Tsz Ling Elaine. “EFFECT OF GEOMETRY, RESPIRATION AND VESSEL DEFORMABILITY ON FONTAN HEMODYNAMICS: A NUMERICAL INVESTIGATION.” 2015. Web. 07 Apr 2020.

Vancouver:

Tang TLE. EFFECT OF GEOMETRY, RESPIRATION AND VESSEL DEFORMABILITY ON FONTAN HEMODYNAMICS: A NUMERICAL INVESTIGATION. [Internet] [Doctoral dissertation]. Georgia Tech; 2015. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/1853/56206.

Council of Science Editors:

Tang TLE. EFFECT OF GEOMETRY, RESPIRATION AND VESSEL DEFORMABILITY ON FONTAN HEMODYNAMICS: A NUMERICAL INVESTIGATION. [Doctoral Dissertation]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/56206

University of Windsor

14. Shademan, Mehrdad. CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer.

Degree: PhD, Mechanical, Automotive, and Materials Engineering, 2015, University of Windsor

URL: https://scholar.uwindsor.ca/etd/5700

► Circular jets impinging vertically on flat surfaces have many practical applications in industry. Nozzle height-to-diameter ratio plays an important role in the performance of this… (more)

▼ Circular jets impinging vertically on flat surfaces have many practical applications in industry. Nozzle height-to-diameter ratio plays an important role in the performance of this type of jet. In this thesis a step by step approach has been followed to cover different aspects of impinging jets. In the first step, a steady Reynolds-Averaged Navier-Stokes simulation has been carried out on impinging jets with different nozzle stand-off distances. A strong dependency of the jet characteristics on the nozzle height-to-diameter ratio was observed. The simulations show that an increase in this ratio results in larger shear stress and more distributed pressure on the wall. In the second step, an unsteady simulation using Large Eddy Simulation has been performed on an impinging jet with large stand-off distance. Good agreement was observed between the mean value results obtained from the current simulations and experiments. Unlike impinging jets with small stand-off distance, where the ring-like vortices keep their interconnected shape upon reaching the plate, no sign of interconnection was observed on the plate for the large stand-off distance case. A large deflection of the jet stagnation streamline was observed in comparison to the cases with small nozzle height-to-diameter ratios. Large fluctuations of the unsteady wall shear stresses were also captured. A boiling model was developed for impinging jets with heat transfer. An Eulerian-Eulerian two-phase flow model was implemented using an open source code for the simulation (OpenFOAM). Initially, an adiabatic two-phase model was developed for flow in a pipe. Following this, the energy equation was activated to account for non-adiabatic and boiling conditions. The simulation predictions were found to be in reasonable agreement with the experimental data and show significant improvement over previous numerical results. Finally, the model was upgraded for an impinging jet flow by implementing new correlations. The results obtained from the current model show reasonable agreement with the experimental results. The model can be confidently used for the evaluation of adiabatic and non-adiabatic impinging jet flows. Advisors/Committee Members: Ronald M Barron, Ramaswami Balachandar.

Subjects/Keywords: computational fluid dynamics; fluid mechanics; impinging jet; turbulence modelling; Mechanical Engineering

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shademan, M. (2015). CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer. (Doctoral Dissertation). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/5700

Chicago Manual of Style (16^th Edition):

Shademan, Mehrdad. “CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer.” 2015. Doctoral Dissertation, University of Windsor. Accessed April 07, 2020. https://scholar.uwindsor.ca/etd/5700.

MLA Handbook (7^th Edition):

Shademan, Mehrdad. “CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer.” 2015. Web. 07 Apr 2020.

Vancouver:

Shademan M. CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer. [Internet] [Doctoral dissertation]. University of Windsor; 2015. [cited 2020 Apr 07]. Available from: https://scholar.uwindsor.ca/etd/5700.

Council of Science Editors:

Shademan M. CFD Simulation of Impinging Jet Flows and Boiling Heat Transfer. [Doctoral Dissertation]. University of Windsor; 2015. Available from: https://scholar.uwindsor.ca/etd/5700

University of Colorado

15. Culp, David B. Numerical Coupling of Fracture and Fluid Pressure Using a Phase-Field Model with Applications in Geomechanics.

Degree: MS, 2018, University of Colorado

URL: https://scholar.colorado.edu/cven_gradetds/362

► The application of fracture mechanics is an increasingly important topic in fields including geophysics, geomechanics, materials engineering, structural mechanics and engineering design. The initiation and… (more)

Subjects/Keywords: coupled; phase-field; pressure; mechanics; fluid; Aerodynamics and Fluid Mechanics; Computational Engineering; Physics

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APA (6^th Edition):

Culp, D. B. (2018). Numerical Coupling of Fracture and Fluid Pressure Using a Phase-Field Model with Applications in Geomechanics. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/362

Chicago Manual of Style (16^th Edition):

Culp, David B. “Numerical Coupling of Fracture and Fluid Pressure Using a Phase-Field Model with Applications in Geomechanics.” 2018. Masters Thesis, University of Colorado. Accessed April 07, 2020. https://scholar.colorado.edu/cven_gradetds/362.

MLA Handbook (7^th Edition):

Culp, David B. “Numerical Coupling of Fracture and Fluid Pressure Using a Phase-Field Model with Applications in Geomechanics.” 2018. Web. 07 Apr 2020.

Vancouver:

Culp DB. Numerical Coupling of Fracture and Fluid Pressure Using a Phase-Field Model with Applications in Geomechanics. [Internet] [Masters thesis]. University of Colorado; 2018. [cited 2020 Apr 07]. Available from: https://scholar.colorado.edu/cven_gradetds/362.

Council of Science Editors:

Culp DB. Numerical Coupling of Fracture and Fluid Pressure Using a Phase-Field Model with Applications in Geomechanics. [Masters Thesis]. University of Colorado; 2018. Available from: https://scholar.colorado.edu/cven_gradetds/362

16. Bågholt, Christoffer. CFD Analysis of Heat Transfer in an Innovative Facade System.

Degree: Engineering Sciences and Mathematics, 2018, Luleå University of Technology

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67357

► New innovative façade systems that are well thought out, rational, sustainable and energy efficient are needed for renovation of old buildings to drastically reduce… (more)

Subjects/Keywords: Computational Fluid Mechanics; Heat Transfer; Building Physics; Fluid Mechanics and Acoustics; Strömningsmekanik och akustik

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APA (6^th Edition):

Bågholt, C. (2018). CFD Analysis of Heat Transfer in an Innovative Facade System. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67357

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bågholt, Christoffer. “CFD Analysis of Heat Transfer in an Innovative Facade System.” 2018. Thesis, Luleå University of Technology. Accessed April 07, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67357.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bågholt, Christoffer. “CFD Analysis of Heat Transfer in an Innovative Facade System.” 2018. Web. 07 Apr 2020.

Vancouver:

Bågholt C. CFD Analysis of Heat Transfer in an Innovative Facade System. [Internet] [Thesis]. Luleå University of Technology; 2018. [cited 2020 Apr 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67357.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bågholt C. CFD Analysis of Heat Transfer in an Innovative Facade System. [Thesis]. Luleå University of Technology; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67357

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Washington

17. Dodd, Michael. Direct numerical simulation of droplet-laden isotropic turbulence.

Degree: PhD, 2017, University of Washington

URL: http://hdl.handle.net/1773/40466

► Interaction of liquid droplets with turbulence is important in numerous applications ranging from rain formation to oil spills to spray combustion. The physical mechanisms of… (more)

▼ Interaction of liquid droplets with turbulence is important in numerous applications ranging from rain formation to oil spills to spray combustion. The physical mechanisms of droplet-turbulence interaction are largely unknown, especially when compared to that of solid particles. Compared to solid particles, droplets can deform, break up, coalesce and have internal fluid circulation. The main goal of this work is to investigate using direct numerical simulation (DNS) the physical mechanisms of droplet-turbulence interaction, both for non-evaporating and evaporating droplets. To achieve this objective, we develop and couple a new pressure-correction method with the volume-of-fluid (VoF) method for simulating incompressible two-fluid flows. The method's main advantage is that the variable coefficient Poisson equation that arises in solving the incompressible Navier-Stokes equations for two-fluid flows is reduced to a constant coefficient equation. This equation can then be solved directly using, e.g., the FFT-based parallel Poisson solver. For a 1024³ mesh, our new pressure-correction method using a fast Poisson solver is ten to forty times faster than the standard pressure-correction method using multigrid. Using the coupled pressure-correction and VoF method, we perform direct numerical simulations (DNS) of 3130 finite-size, non-evaporating droplets of diameter approximately equal to the Taylor lengthscale and with 5~% droplet volume fraction in decaying isotropic turbulence at initial Taylor-scale Reynolds number \Rey_λ=83. In the droplet-laden cases, we vary one of the following three parameters: the droplet Weber number based on the r.m.s. velocity of turbulence (0.1 ≤ \Webrms ≤ 5), the droplet- to carrier-fluid density ratio (1 ≤ ρ_d/ρ_c ≤ 100) or the droplet- to carrier-fluid viscosity ratio (1 ≤ μ_d/μ_c ≤ 100). We derive the turbulence kinetic energy (TKE) equations for the two-fluid, carrier-fluid and droplet-fluid flow. These equations allow us to explain the pathways for TKE exchange between the carrier turbulent flow and the flow inside the droplet. We also explain the role of the interfacial surface energy in the two-fluid TKE equation through work performed by surface tension. Furthermore, we derive the relationship between the power of surface tension and the rate of change of total droplet surface area. This link allows us to explain how droplet deformation, breakup and coalescence play roles in the temporal evolution of TKE. We then extend the code for non-evaporating droplets and develop a combined VoF method and low-Mach-number approach to simulate evaporating and condensing droplets. The two main novelties of the method are: (i) the VOF algorithm captures the motion of the liquid gas interface in the presence of mass transfer due to evaporation and condensation without requiring a projection step for the liquid velocity, and (ii) the low-Mach-number approach allows for local volume changes caused by phase change while the total volume of the liquid-gas… Advisors/Committee Members: Ferrante, Antonino (advisor).

Subjects/Keywords: droplets; fluid mechanics; multiphase flows; turbulence; Fluid mechanics; Computational physics; Mechanical engineering; Aeronautics and astronautics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dodd, M. (2017). Direct numerical simulation of droplet-laden isotropic turbulence. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/40466

Chicago Manual of Style (16^th Edition):

Dodd, Michael. “Direct numerical simulation of droplet-laden isotropic turbulence.” 2017. Doctoral Dissertation, University of Washington. Accessed April 07, 2020. http://hdl.handle.net/1773/40466.

MLA Handbook (7^th Edition):

Dodd, Michael. “Direct numerical simulation of droplet-laden isotropic turbulence.” 2017. Web. 07 Apr 2020.

Vancouver:

Dodd M. Direct numerical simulation of droplet-laden isotropic turbulence. [Internet] [Doctoral dissertation]. University of Washington; 2017. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/1773/40466.

Council of Science Editors:

Dodd M. Direct numerical simulation of droplet-laden isotropic turbulence. [Doctoral Dissertation]. University of Washington; 2017. Available from: http://hdl.handle.net/1773/40466

18. Zhang, Yutong. Computational Flow Analysis of a Cyclone Vacuum Cleaner.

Degree: MS, Engineering, 2019, Rice University

URL: http://hdl.handle.net/1911/105402

► Computational flow analysis of a cyclone vacuum cleaner can provide valuable fluid mechanics information for efficient design and operation. The vacuum cleaner is made of… (more)

Subjects/Keywords: Fluid Mechanics; Computational Fluid Mechanics

…and computer simulation. Our goal is to develop a computational model to simulate the… …computational methods utilized. Chapter 4 covers problem setup and computation details. Chapter 5… …x28;x) is specified as the initial condition. 3 4 5 Chapter 3 Computational… …2], thermo-fluid analysis of ground vehicles and their tires [6], thermo… …fluid analysis of disk brakes [41], flow-driven string dynamics [42], and…

10 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, Y. (2019). Computational Flow Analysis of a Cyclone Vacuum Cleaner. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/105402

Chicago Manual of Style (16^th Edition):

Zhang, Yutong. “Computational Flow Analysis of a Cyclone Vacuum Cleaner.” 2019. Masters Thesis, Rice University. Accessed April 07, 2020. http://hdl.handle.net/1911/105402.

MLA Handbook (7^th Edition):

Zhang, Yutong. “Computational Flow Analysis of a Cyclone Vacuum Cleaner.” 2019. Web. 07 Apr 2020.

Vancouver:

Zhang Y. Computational Flow Analysis of a Cyclone Vacuum Cleaner. [Internet] [Masters thesis]. Rice University; 2019. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/1911/105402.

Council of Science Editors:

Zhang Y. Computational Flow Analysis of a Cyclone Vacuum Cleaner. [Masters Thesis]. Rice University; 2019. Available from: http://hdl.handle.net/1911/105402

Penn State University

19. Banco, Gino G. MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS.

Degree: PhD, Mechanical Engineering, 2010, Penn State University

URL: https://etda.libraries.psu.edu/catalog/11436

► The primary roles of the small intestine (gut) are nutrient absorption and transport of digestive material (chyme). Two basic motility patterns (modes) exist to control… (more)

▼ The primary roles of the small intestine (gut) are nutrient absorption and transport of digestive material (chyme). Two basic motility patterns (modes) exist to control these transport phenomena: propulsive wave-like propagations peristalsis) for axial transport, and rhythmic contractions of short segments of the gut segmentation) for radial transport to the surface for absorption. Once nutrients are advected to the surface, however, they must diffuse through a low-velocity fluid layer known as the “unstirred (water) layer (UL).” The thickness of this layer has been reported up to ~1000 (micro)m, which, however, is physiologically unrealistic. More realistic studies have reported thicknesses of less than 50(micro)m, suggesting that a “highly efficient stirring mechanism” may be present in vivo to produce such small UL thicknesses. We hypothesize that finger-like projections (villi) on the intestinal surface, under active muscular control, generate a “micro-mixing-layer (MML)” which, when coupled with macro-scale mixing, can provide highly efficient stirring. We develop a physiologically accurate computational model to investigate the hypothesis. We use the lattice Boltzmann framework (LBM) to predict fluid and scalar motions, with moving boundary conditions, and zero-passive-scalar concentration at the epithelial surface to model rapid nutrient absorption. Using simpler gut models of flow generated by peristaltic and segmental motility (developed to establish technology needed for the combined multi-scale model), we show that the fluid mechanics-driven absorption dynamics of the small intestine is much more complex and interesting than has been previously reported. Contrary to common wisdom, over the physiological range of occlusion ratios (Rmin/Ravg, where Rmin and Ravg are minimum and average radius, respectively), both peristalsis and segmentation significantly promote nutrient absorption. Segmentation has long been associated with the absorption process, but peristalsis has been generally explained as only necessary for axial transport. We show that the propulsive mechanisms generated by peristalsis for axial transport also create high nutrient gradients near the surface. These nutrient gradients lead to absorption characteristics of peristaltic motility that can be comparable to, or even exceed those of segmental motility. However, we also show that to maximize absorption while minimizing the power required by the muscle contractions necessary for gut motility, segmentation is optimal over the range of physiologically relevant occlusion ratios. A three-dimensional, multi-scale lattice Boltzmann model was developed to study the effects of coupled macro-scale deformations and pendular villous motility on absorption. We show that active movements of the villi can enhance absorption by ~25% beyond passive villous movements induced by macro-scale motility patterns alone. Increasing the length or the frequency of oscillation enhances the effect. Consistent with the findings of our simplified 2D and 3D villous motility…

Subjects/Keywords: fluid dynamics; fluid mechanics; small intestine; lattice boltzmann; computational fluid dynamics (cfd)

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Banco, G. G. (2010). MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/11436

Chicago Manual of Style (16^th Edition):

Banco, Gino G. “MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS.” 2010. Doctoral Dissertation, Penn State University. Accessed April 07, 2020. https://etda.libraries.psu.edu/catalog/11436.

MLA Handbook (7^th Edition):

Banco, Gino G. “MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS.” 2010. Web. 07 Apr 2020.

Vancouver:

Banco GG. MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS. [Internet] [Doctoral dissertation]. Penn State University; 2010. [cited 2020 Apr 07]. Available from: https://etda.libraries.psu.edu/catalog/11436.

Council of Science Editors:

Banco GG. MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS. [Doctoral Dissertation]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/11436

20. Cakir, Mustafa. CFD study on aerodynamic effects of a rear wing/spoiler on a passenger vehicle.

Degree: MS, Mechanical Engineering, 2012, Santa Clara University

URL: https://scholarcommons.scu.edu/mech_mstr/1

► Aerodynamic characteristics of a racing car are of significant interest in reducing car-racing accidents due to wind loading and in reducing the fuel consumption.… (more)

▼ Aerodynamic characteristics of a racing car are of significant interest in reducing car-racing accidents due to wind loading and in reducing the fuel consumption. At the present, modified car racing becomes more popular around the world. Sports cars are most commonly seen with spoilers, such as Ford Mustang, Subaru Impreza, and Chevrolet Corvette. Even though these vehicles typically have a more rigid chassis and a stiffer suspension to aid in high-speed maneuverability, a spoiler can still be beneficial. One of the design goals of a spoiler is to reduce drag and increase fuel efficiency. Many vehicles have a fairly steep downward angle going from the rear edge of the roof down to the trunk or tail of the car. Air flowing across the roof tumbles over this edge at higher speeds, causing flow separation. The flow of air becomes turbulent and a low pressure zone is created, thus increases drag. Adding a spoiler at the very rear of the vehicle makes the air slice longer, gentler slope from the roof to the spoiler, which helps to reduce the flow separation. Reducing flow separation decreases drag, which increases fuel economy; it also helps keep the rear window clear because the air flows smoothly through the rear window. The limitations of conventional wind tunnel experiment and rapid developments in computer hardware, considerable efforts have been invested in the last decade to study vehicle aerodynamics computationally. This thesis will present a numerical simulation of flow around racing car with spoiler positioned at the rear end using commercial fluid dynamic software ANSYS FLUENT®. The thesis will focus on CFD-based lift and drag prediction on the car body after the spoiler is mounted at the rear edge of the vehicle. A 3D computer model of 4-door sedan car (which will be designed with commercial software SolidWorks®) will be used as the base model. Different spoilers, in different locations will be positioned at the rear end of vehicle and the simulation will be run in order to determine the aerodynamic effects of spoiler. Advisors/Committee Members: Drazen Fabris.

Subjects/Keywords: fluid dynamics; computational fluid dynamics; aerodynamics; motor vehicles; Aerodynamics and Fluid Mechanics; Engineering; Mechanical Engineering

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APA (6^th Edition):

Cakir, M. (2012). CFD study on aerodynamic effects of a rear wing/spoiler on a passenger vehicle. (Masters Thesis). Santa Clara University. Retrieved from https://scholarcommons.scu.edu/mech_mstr/1

Chicago Manual of Style (16^th Edition):

Cakir, Mustafa. “CFD study on aerodynamic effects of a rear wing/spoiler on a passenger vehicle.” 2012. Masters Thesis, Santa Clara University. Accessed April 07, 2020. https://scholarcommons.scu.edu/mech_mstr/1.

MLA Handbook (7^th Edition):

Cakir, Mustafa. “CFD study on aerodynamic effects of a rear wing/spoiler on a passenger vehicle.” 2012. Web. 07 Apr 2020.

Vancouver:

Cakir M. CFD study on aerodynamic effects of a rear wing/spoiler on a passenger vehicle. [Internet] [Masters thesis]. Santa Clara University; 2012. [cited 2020 Apr 07]. Available from: https://scholarcommons.scu.edu/mech_mstr/1.

Council of Science Editors:

Cakir M. CFD study on aerodynamic effects of a rear wing/spoiler on a passenger vehicle. [Masters Thesis]. Santa Clara University; 2012. Available from: https://scholarcommons.scu.edu/mech_mstr/1

University of Kentucky

21. Strodtbeck, Joshua. A FILTER-FORCING TURBULENCE MODEL FOR LARGE EDDY SIMULATION INCORPORATING THE COMPRESSIBLE "POOR MAN'S" NAVIER – STOKES EQUATIONS.

Degree: 2012, University of Kentucky

URL: https://uknowledge.uky.edu/me_etds/13

► A new approach to large-eddy simulation (LES) based on the use of explicit spatial filtering combined with backscatter forcing is presented. The forcing uses a… (more)

Subjects/Keywords: fluid dynamics; turbulence modeling; computational fluid dynamics; compressible flows; Aerodynamics and Fluid Mechanics

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APA (6^th Edition):

Strodtbeck, J. (2012). A FILTER-FORCING TURBULENCE MODEL FOR LARGE EDDY SIMULATION INCORPORATING THE COMPRESSIBLE "POOR MAN'S" NAVIER – STOKES EQUATIONS. (Doctoral Dissertation). University of Kentucky. Retrieved from https://uknowledge.uky.edu/me_etds/13

Chicago Manual of Style (16^th Edition):

Strodtbeck, Joshua. “A FILTER-FORCING TURBULENCE MODEL FOR LARGE EDDY SIMULATION INCORPORATING THE COMPRESSIBLE "POOR MAN'S" NAVIER – STOKES EQUATIONS.” 2012. Doctoral Dissertation, University of Kentucky. Accessed April 07, 2020. https://uknowledge.uky.edu/me_etds/13.

MLA Handbook (7^th Edition):

Strodtbeck, Joshua. “A FILTER-FORCING TURBULENCE MODEL FOR LARGE EDDY SIMULATION INCORPORATING THE COMPRESSIBLE "POOR MAN'S" NAVIER – STOKES EQUATIONS.” 2012. Web. 07 Apr 2020.

Vancouver:

Strodtbeck J. A FILTER-FORCING TURBULENCE MODEL FOR LARGE EDDY SIMULATION INCORPORATING THE COMPRESSIBLE "POOR MAN'S" NAVIER – STOKES EQUATIONS. [Internet] [Doctoral dissertation]. University of Kentucky; 2012. [cited 2020 Apr 07]. Available from: https://uknowledge.uky.edu/me_etds/13.

Council of Science Editors:

Strodtbeck J. A FILTER-FORCING TURBULENCE MODEL FOR LARGE EDDY SIMULATION INCORPORATING THE COMPRESSIBLE "POOR MAN'S" NAVIER – STOKES EQUATIONS. [Doctoral Dissertation]. University of Kentucky; 2012. Available from: https://uknowledge.uky.edu/me_etds/13

Arizona State University

22. Kedelty, Dominic Sebastian. A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods.

Degree: Mechanical Engineering, 2015, Arizona State University

URL: http://repository.asu.edu/items/29784

► The Volume-of-Fluid method is a popular method for interface tracking in Multiphase applications within Computational Fluid Dynamics. To date there exists several algorithms for reconstruction… (more)

Subjects/Keywords: Mechanical engineering; computational fluid dynamics; fluid mechanics; interface capturing; interface tracking; multiphase; Volume-of-Fluid

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APA (6^th Edition):

Kedelty, D. S. (2015). A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods. (Masters Thesis). Arizona State University. Retrieved from http://repository.asu.edu/items/29784

Chicago Manual of Style (16^th Edition):

Kedelty, Dominic Sebastian. “A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods.” 2015. Masters Thesis, Arizona State University. Accessed April 07, 2020. http://repository.asu.edu/items/29784.

MLA Handbook (7^th Edition):

Kedelty, Dominic Sebastian. “A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods.” 2015. Web. 07 Apr 2020.

Vancouver:

Kedelty DS. A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods. [Internet] [Masters thesis]. Arizona State University; 2015. [cited 2020 Apr 07]. Available from: http://repository.asu.edu/items/29784.

Council of Science Editors:

Kedelty DS. A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods. [Masters Thesis]. Arizona State University; 2015. Available from: http://repository.asu.edu/items/29784

University of Windsor

23. Vaselbehagh, Ahmadreza. Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant.

Degree: PhD, Mechanical, Automotive, and Materials Engineering, 2015, University of Windsor

URL: https://scholar.uwindsor.ca/etd/5493

► The present document is a manuscript-based dissertation covering Ahmadreza Vasel-Be-Hagh's PhD research from September, 2011 to May, 2015. The research was particularly focused on… (more)

▼ The present document is a manuscript-based dissertation covering Ahmadreza Vasel-Be-Hagh's PhD research from September, 2011 to May, 2015. The research was particularly focused on studying hydrodynamics of underwater accumulators of compressed air for an underwater compressed air energy storage (UWCAES) plant. The accumulator units were floral configurations of droplet-shaped balloons installed close to the bed of deep water. The research was carried out in two major parts: water flow over the balloons and flow produced by the bursting of the balloons. In the first part, three-dimensional simulations were conducted to investigate water flow over accumulators. The simulation was carried out at a free stream Reynolds number of 230,000 using URANS k – omega and LES Dyna – SM turbulence models. The structure of the flow was investigated using iso-surfaces of the second invariant of the velocity gradient and three-dimensional path lines. Several shedding vortex tubes were identified downstream of the balloons. The dynamics of these vortex tubes was further illustrated through time series snapshots containing vorticity lines on two-dimensional planes perpendicular to the flow direction. The frequency of the shedding and the turbulent movements of the vortex tubes were studied through power spectrum analysis of the force coefficients. In the second part, the flow produced by the bursting of balloons was studied experimentally using photographs taken by three cameras with speed of 60 frames per second at a resolution of 1080P. It was observed that if a sufficiently large air-filled balloon quickly burst underwater, a vortex ring bubble was generated. The effect of dimensionless surface tension on general characteristics of the vortex ring bubble including rise velocity, rate of expansion, circulation and trajectory was investigated. It was observed that as the dimensionless surface tension increased, the rise velocity, the circulation and consequently the stability of the vortex ring bubble increased; however, the rate of expansion tends toward constant values. A semi-analytical model was also developed suggesting that the vortex ring expansion is essentially due to the buoyancy force. An expression was also obtained for the circulation in terms of the initial volume of the balloon and the depth at which balloon bursts. Extending from the mentioned semi-analytical model, a perturbation analysis was performed to find an expression for the radius of the buoyant vortex rings. The radius equation includes two terms; the zeroth-order solution representing the effect of buoyancy, and the first-order perturbation correction describing the influence of viscosity. The zeroth-order solution is an explicit function of time; the first-order perturbation modification, however, includes the drag coefficient which is unknown and of interest. Fitting the photographically measured radius into the modified equation yields the time history of the drag coefficient of the corresponding buoyant vortex ring. Advisors/Committee Members: Ting, David, Carriveau, Rupp.

Subjects/Keywords: CFD; Computational Fluid Dynamics; Experimental Fluid Dynamics; Fluid mechanics; Vortex Dynamics; Vortex Ring

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APA (6^th Edition):

Vaselbehagh, A. (2015). Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant. (Doctoral Dissertation). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/5493

Chicago Manual of Style (16^th Edition):

Vaselbehagh, Ahmadreza. “Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant.” 2015. Doctoral Dissertation, University of Windsor. Accessed April 07, 2020. https://scholar.uwindsor.ca/etd/5493.

MLA Handbook (7^th Edition):

Vaselbehagh, Ahmadreza. “Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant.” 2015. Web. 07 Apr 2020.

Vancouver:

Vaselbehagh A. Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant. [Internet] [Doctoral dissertation]. University of Windsor; 2015. [cited 2020 Apr 07]. Available from: https://scholar.uwindsor.ca/etd/5493.

Council of Science Editors:

Vaselbehagh A. Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant. [Doctoral Dissertation]. University of Windsor; 2015. Available from: https://scholar.uwindsor.ca/etd/5493

University of California – San Diego

24. Hsu, Ming-Chen. Fluid-Structure Interaction Analysis of Wind Turbines.

Degree: Structural Engineering, 2012, University of California – San Diego

URL: http://www.escholarship.org/uc/item/6rn568h0

► Countries around the world are putting substantial effort into the development of wind energy technologies. The urgent need of renewable energy puts pressure on the… (more)

Subjects/Keywords: Engineering; Mechanics; Energy; Computational Fluid Dynamics; Computational Mechanics; Finite Element Method; Fluid-Structure Interaction; Isogeometric Analysis; Wind Energy

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APA (6^th Edition):

Hsu, M. (2012). Fluid-Structure Interaction Analysis of Wind Turbines. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/6rn568h0

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hsu, Ming-Chen. “Fluid-Structure Interaction Analysis of Wind Turbines.” 2012. Thesis, University of California – San Diego. Accessed April 07, 2020. http://www.escholarship.org/uc/item/6rn568h0.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hsu, Ming-Chen. “Fluid-Structure Interaction Analysis of Wind Turbines.” 2012. Web. 07 Apr 2020.

Vancouver:

Hsu M. Fluid-Structure Interaction Analysis of Wind Turbines. [Internet] [Thesis]. University of California – San Diego; 2012. [cited 2020 Apr 07]. Available from: http://www.escholarship.org/uc/item/6rn568h0.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hsu M. Fluid-Structure Interaction Analysis of Wind Turbines. [Thesis]. University of California – San Diego; 2012. Available from: http://www.escholarship.org/uc/item/6rn568h0

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Tech

25. Haggerty, Christopher Mark. Total cavopulmonary hemodynamics and the single ventricle: functional relationships and translational possibilities: Total cavopulmonary connection hemodynamics and the single ventricle: functional relationships and translational possibilities.

Degree: PhD, Biomedical Engineering, 2012, Georgia Tech

URL: http://hdl.handle.net/1853/51926

► Single ventricle heart defects are a rare but serious form of congenital heart disease, which affect approximately 2000 children born in the United States each… (more)

▼ Single ventricle heart defects are a rare but serious form of congenital heart disease, which affect approximately 2000 children born in the United States each year. Staged surgical palliation, culminating with the “Fontan Procedure,” is typically required to achieve adequate supply of blood to both the pulmonary and systemic circulations while avoiding chronic ventricular volume overload. This surgery reroutes the systemic veins to the pulmonary arteries, forming a total cavopulmonary connection (TCPC), to completely bypass the right side of the heart and restore a series configuration to the cardiovascular circuits. Despite improved survival through this operative course in first weeks and years of life, Fontan patients are subjected gradual attrition and decreased life expectancy through a multitude of chronic complications. It is suspected that the adverse hemodynamics of this surgically altered physiology, including those specific to the surgical TCPC, play a role in determining patient outcome. However, the small and heterogeneous patient population has hindered decisive progress and there is still not a good understanding of the optimal care strategies on a patient-by-patient basis. In recent decades, advances in medical imaging and image-based computational fluid dynamics (CFD) have redefined the realm of possibility for studying complex biomedical phenomena. Combined, these methods provide the means to create and evaluate patient-specific models of a wide range of cardiovascular structures, including the TCPC, with high fidelity. Results from these models can then be used for a wide array of different analyses, such as identifying regions of flow separation or stagnation, calculating hemodynamic power loss, or quantifying local flow distribution patterns. Through significant effort from numerous past investigators, a robust set of validated computational and image processing tools has been assembled, along with the largest library of cardiac magnetic resonance (CMR) data of TCPC anatomy and flow. These tools are leveraged in this thesis to characterize the functional implications of TCPC power loss at an unprecedented scale: we report the largest CFD analysis of patient-specific TCPC hemodynamics to date with particular focus on identifying functional correlates. Combining these data with imaging-based analysis of ventricle function, we directly compare the CFD-derived hemodynamics to the performance of the single ventricle for the first time. Motivated by the physiologic significance of these findings, the same patient-specific CFD framework is used for the translational application of prospective surgery planning for hemodynamic optimization, including the first implementation of a novel TCPC connection design hypothesized to uniquely streamline the energetic performance. We conclude with a first look at the longitudinal evolution of patient functional status to begin understanding how factors such as TCPC hemodynamics contribute to poor long-term performance in these patients. Advisors/Committee Members: Yoganathan, Ajit P. (advisor), Kanter, Kirk R. (committee member), Oshinski, John N. (committee member), Fogel, Mark A. (committee member), Gleason, Rudolph (committee member).

Subjects/Keywords: Congenital heart disease; Fluid mechanics; Computational fluid dynamics; Pediatric cardiology; Congenital heart disease; Hemodynamics; Heart Abnormalities Surgery; Computational fluid dynamics

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APA (6^th Edition):

Haggerty, C. M. (2012). Total cavopulmonary hemodynamics and the single ventricle: functional relationships and translational possibilities: Total cavopulmonary connection hemodynamics and the single ventricle: functional relationships and translational possibilities. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/51926

Chicago Manual of Style (16^th Edition):

Haggerty, Christopher Mark. “Total cavopulmonary hemodynamics and the single ventricle: functional relationships and translational possibilities: Total cavopulmonary connection hemodynamics and the single ventricle: functional relationships and translational possibilities.” 2012. Doctoral Dissertation, Georgia Tech. Accessed April 07, 2020. http://hdl.handle.net/1853/51926.

MLA Handbook (7^th Edition):

Haggerty, Christopher Mark. “Total cavopulmonary hemodynamics and the single ventricle: functional relationships and translational possibilities: Total cavopulmonary connection hemodynamics and the single ventricle: functional relationships and translational possibilities.” 2012. Web. 07 Apr 2020.

Vancouver:

Haggerty CM. Total cavopulmonary hemodynamics and the single ventricle: functional relationships and translational possibilities: Total cavopulmonary connection hemodynamics and the single ventricle: functional relationships and translational possibilities. [Internet] [Doctoral dissertation]. Georgia Tech; 2012. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/1853/51926.

Council of Science Editors:

Haggerty CM. Total cavopulmonary hemodynamics and the single ventricle: functional relationships and translational possibilities: Total cavopulmonary connection hemodynamics and the single ventricle: functional relationships and translational possibilities. [Doctoral Dissertation]. Georgia Tech; 2012. Available from: http://hdl.handle.net/1853/51926

Florida Atlantic University

26. Buono, Armand C. Predicting the flow & noise of a rotor in a turbulent boundary layer using an actuator disk – Rans approach.

Degree: MS, 2014, Florida Atlantic University

URL: http://purl.flvc.org/fau/fd/FA00004269 ; (URL) http://purl.flvc.org/fau/fd/FA00004269

►

Summary: The numerical method presented in this study attempts to predict the mean, non-uniform flow field upstream of a propeller partially immersed in a thick… (more)

Subjects/Keywords: Aeroelasticity; Computational fluid dynamics; Fluid dynamic measurements; Fluid mechanics – Mathematical models; Turbomachines – Fluid dynamics; Turbulence – Mathematical models

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APA (6^th Edition):

Buono, A. C. (2014). Predicting the flow & noise of a rotor in a turbulent boundary layer using an actuator disk – Rans approach. (Masters Thesis). Florida Atlantic University. Retrieved from http://purl.flvc.org/fau/fd/FA00004269 ; (URL) http://purl.flvc.org/fau/fd/FA00004269

Chicago Manual of Style (16^th Edition):

Buono, Armand C. “Predicting the flow & noise of a rotor in a turbulent boundary layer using an actuator disk – Rans approach.” 2014. Masters Thesis, Florida Atlantic University. Accessed April 07, 2020. http://purl.flvc.org/fau/fd/FA00004269 ; (URL) http://purl.flvc.org/fau/fd/FA00004269.

MLA Handbook (7^th Edition):

Buono, Armand C. “Predicting the flow & noise of a rotor in a turbulent boundary layer using an actuator disk – Rans approach.” 2014. Web. 07 Apr 2020.

Vancouver:

Buono AC. Predicting the flow & noise of a rotor in a turbulent boundary layer using an actuator disk – Rans approach. [Internet] [Masters thesis]. Florida Atlantic University; 2014. [cited 2020 Apr 07]. Available from: http://purl.flvc.org/fau/fd/FA00004269 ; (URL) http://purl.flvc.org/fau/fd/FA00004269.

Council of Science Editors:

Buono AC. Predicting the flow & noise of a rotor in a turbulent boundary layer using an actuator disk – Rans approach. [Masters Thesis]. Florida Atlantic University; 2014. Available from: http://purl.flvc.org/fau/fd/FA00004269 ; (URL) http://purl.flvc.org/fau/fd/FA00004269

27. Popat, Nilesh R. Steep capillary waves on gravity waves.

Degree: PhD, 1989, University of Bristol

URL: http://hdl.handle.net/1983/78695ee9-b923-4374-b70c-6589b4215241

► The frequent presence of ripples on the free surface of water. on both thin film flows and ponds or lakes motivates this theoretical investigation into… (more)

▼ The frequent presence of ripples on the free surface of water. on both thin film flows and ponds or lakes motivates this theoretical investigation into the propagation of ripples on gravity waves. These ripples are treated as "slowly-varying" waves in a reference frame where the gravity wave flow is steady. The methods used are those of the averaged Lagrangian (Whitham 1965,1967,1974) and the averaged equations of motion (Phillips 1966) which are shown to be equivalent. The capillary wave modulation is taken to be steady in the reference frame which brings the gravity wave, or gravity driven flow, to rest. Firstly the motion over ponds or lakes is considered. Linear capillary-gravity waves are examined in order to set the scene. Crapper's (1957) exact finite-amplitude waves are examined next to show the actual behaviour of the flow field. The underlying gravity driven flow is that of pure gravity waves over an' "infinite" depth liquid. These gravity waves are modelled with "numerically exact" solutions for periodic plane-waves. The initial studies are inviscid and show that steep gravity waves either "absorb" or "sweep-up" a range of capillary waves or, alternatively, cause them to break in the vicinity of gravity wave crests. Improvements on the theory are made by including viscous dissipation of wave energy. This leads to a number of solutions approaching "stopping velocities" or the "stopped waves solution". In addition to these effects "higher-order dispersion" is introduced for weakly nonlinear waves near linear caustics. This clarifies aspects of the dissipation results and shows that wave reflection sometimes occurs. Secondly, waves on thin film flows are considered. Linear capillary-gravity waves are again examined in order to set the scene. Kinnersley's (1957) exact finite-amplitude waves are examined next to show the actual behaviour of the flow field. The underlying gravity driven flow is given by shallow water gravity waves. No modelling of these is necessary simply because they are included within Whitham's or Phillips' equations ab initio. This study is inviscid and shows the unexpected presence of critical velocities at which pairs of solution branches originate. iii

Subjects/Keywords: 532; Computational fluid mechanics

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APA (6^th Edition):

Popat, N. R. (1989). Steep capillary waves on gravity waves. (Doctoral Dissertation). University of Bristol. Retrieved from http://hdl.handle.net/1983/78695ee9-b923-4374-b70c-6589b4215241

Chicago Manual of Style (16^th Edition):

Popat, Nilesh R. “Steep capillary waves on gravity waves.” 1989. Doctoral Dissertation, University of Bristol. Accessed April 07, 2020. http://hdl.handle.net/1983/78695ee9-b923-4374-b70c-6589b4215241.

MLA Handbook (7^th Edition):

Popat, Nilesh R. “Steep capillary waves on gravity waves.” 1989. Web. 07 Apr 2020.

Vancouver:

Popat NR. Steep capillary waves on gravity waves. [Internet] [Doctoral dissertation]. University of Bristol; 1989. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/1983/78695ee9-b923-4374-b70c-6589b4215241.

Council of Science Editors:

Popat NR. Steep capillary waves on gravity waves. [Doctoral Dissertation]. University of Bristol; 1989. Available from: http://hdl.handle.net/1983/78695ee9-b923-4374-b70c-6589b4215241

University of Salford

28. Barber, Robert William. Numerical modelling of jet-forced circulation in reservoirs using boundary-fitted coordinate systems.

Degree: PhD, 1990, University of Salford

URL: http://usir.salford.ac.uk/id/eprint/26561/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280809

► Throughout the past decade, interest has grown in the use of boundary-fitted coordinate systems in many areas of computational fluid dynamics. The boundary-fitted technique provides… (more)

▼ Throughout the past decade, interest has grown in the use of boundary-fitted coordinate systems in many areas of computational fluid dynamics. The boundary-fitted technique provides an exact method of implementing finite-difference numerical schemes in curved flow geometries and offers an alternative solution procedure to the finite-element method. The unavoidable large bandwidth of the global stiffness matrix, employed in finite-element algorithms, means that they are computationally less efficient than corresponding finite-difference schemes. As a consequence, the boundary-fitted method offers a more efficient process for solving partial differential flow equations in awkwardly shaped regions. This thesis describes a versatile finite-difference numerical scheme for the solution of the shallow water equations on arbitrary boundary-fitted non-orthogonal curvilinear grids. The model is capable of simulating flows in irregular geometries typically encountered in river basin management. Validation tests have been conducted against the severe condition of jet-forced flow in a circular reservoir with vertical side walls, where initial reflections of free surface waves pose major problems in achieving a stable solution. Furthermore, the validation exercises have been designed to test the computer model for artificial diffusion which may be a consequence of the numerical scheme adopted to stabilise the shallow water equations. The thesis also describes two subsidiary numerical studies of jet-forced recirculating flow in circular cylinders. The first of these implements a Biot-Savart discrete vortex method for simulating the vorticity in the shear layers of the inflow jet, whereas the second employs a stream function/vorticity-transport finite-difference procedure for solving the two-dimensional Navier-Stokes equations on a distorted orthogonal polar mesh. Although the predictions from the stream function/vorticity-transport model are confined to low Reynolds number flows, they provide a valuable set of benchmark velocity fields which are used to confirm the validity of the boundary-fitted shallow water equation solver.

Subjects/Keywords: 532; Computational fluid mechanics

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APA (6^th Edition):

Barber, R. W. (1990). Numerical modelling of jet-forced circulation in reservoirs using boundary-fitted coordinate systems. (Doctoral Dissertation). University of Salford. Retrieved from http://usir.salford.ac.uk/id/eprint/26561/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280809

Chicago Manual of Style (16^th Edition):

Barber, Robert William. “Numerical modelling of jet-forced circulation in reservoirs using boundary-fitted coordinate systems.” 1990. Doctoral Dissertation, University of Salford. Accessed April 07, 2020. http://usir.salford.ac.uk/id/eprint/26561/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280809.

MLA Handbook (7^th Edition):

Barber, Robert William. “Numerical modelling of jet-forced circulation in reservoirs using boundary-fitted coordinate systems.” 1990. Web. 07 Apr 2020.

Vancouver:

Barber RW. Numerical modelling of jet-forced circulation in reservoirs using boundary-fitted coordinate systems. [Internet] [Doctoral dissertation]. University of Salford; 1990. [cited 2020 Apr 07]. Available from: http://usir.salford.ac.uk/id/eprint/26561/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280809.

Council of Science Editors:

Barber RW. Numerical modelling of jet-forced circulation in reservoirs using boundary-fitted coordinate systems. [Doctoral Dissertation]. University of Salford; 1990. Available from: http://usir.salford.ac.uk/id/eprint/26561/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280809

University of Washington

29. Lu, Dawei. Numerical criterion for incipient separation of turbulent flows as inferred by RANS.

Degree: 2019, University of Washington

URL: http://hdl.handle.net/1773/44012

► Simulations of turbulent flows based on the Reynolds-averaged Navier-Stokes (RANS) equations are widely used for engineering applications and are computationally less expensive than other numerical… (more)

Subjects/Keywords:

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APA (6^th Edition):

Lu, D. (2019). Numerical criterion for incipient separation of turbulent flows as inferred by RANS. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/44012

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lu, Dawei. “Numerical criterion for incipient separation of turbulent flows as inferred by RANS.” 2019. Thesis, University of Washington. Accessed April 07, 2020. http://hdl.handle.net/1773/44012.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lu, Dawei. “Numerical criterion for incipient separation of turbulent flows as inferred by RANS.” 2019. Web. 07 Apr 2020.

Vancouver:

Lu D. Numerical criterion for incipient separation of turbulent flows as inferred by RANS. [Internet] [Thesis]. University of Washington; 2019. [cited 2020 Apr 07]. Available from: http://hdl.handle.net/1773/44012.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lu D. Numerical criterion for incipient separation of turbulent flows as inferred by RANS. [Thesis]. University of Washington; 2019. Available from: http://hdl.handle.net/1773/44012

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Notre Dame

30. Edwin Mathews. Numerical and Theoretical Analysis of Aero-Optics with Application to an Optical Turret</h1>.

Degree: PhD, Aerospace and Mechanical Engineering, 2017, University of Notre Dame

URL: https://curate.nd.edu/show/3197xk83k9c

► When an optical beam is transmitted through a compressible turbulent flow, it is distorted due to the non-uniform speed of light resulting from density… (more)

▼ When an optical beam is transmitted through a compressible turbulent flow, it is distorted due to the non-uniform speed of light resulting from density fluctuations. The distortions caused by turbulent airflow surrounding the exit pupil of a beam director, known as aero-optical phenomena, are a major impediment to applications of airborne laser systems. The objectives of this research are to gain a deep understanding of the fluid dynamical causes of aero-optical phenomena and to improve the ability to predict them in practically important flow configurations. <span></span>To better understand the spectral properties of aero-optical distortions, a general expression for the phase-distortion spectrum is derived from the ideal-gas law and Gladstone-Dale relation. Using this expression, the relationship among the optical distortion magnitude, turbulence length scales, and aperture size is examined, and resolution requirements for wavefront sensor measurements and numerical simulations are analyzed. Large-eddy simulations (LES) of weakly compressible, temporally evolving shear layers are used to verify theoretical results and to investigate turbulent density fluctuations in relation to pressure and temperature fluctuations. Computational results support theoretical findings and confirm that if the log slope of the one-dimensional density spectrum in the inertial range is -m_rho, the optical phase distortion spectral slope is given by -m_rho + 1. The value of m_rho is shown to be dependent on the ratio of shear-layer free-stream densities and bounded by the spectral slopes of temperature and pressure fluctuations. One of the most widely used optical transmission platforms is the hemisphere-on-cylinder turret. When employed on an aircraft, the bluff-body shape of the turret creates a complex turbulent flow that can cause severe optical aberrations at even low subsonic Mach numbers. To investigate the turret aero-optics, wall-modeled LES is used to simulate flow over a turret at Mach 0.4 and Reynolds number of 2.3 x 10⁶, and the optical distortions are computed using ray tracing. Basic flow and optical statistics show agreement with available experimental data. It is found that the optical distortion over a majority of the turret field-of-regard is solely dependent on the lookback angle. Regions of the field-of-regard where the lookback angle alone is not sufficient to relate viewing angle to optical distortion are those strongly affected by the horn vortices in the turret wake. Wavefront statistics as functions of viewing angle are presented along with the effects of pressure and temperature fluctuations on optical distortions. Topics important to the design of aero-optical mitigation strategies, such as steady lensing, beam jitter and the connection between optical distortions and turret pressure fluctuations, are discussed and quantified. Advisors/Committee Members: Stanislav Gordeyev, Committee Member, Meng Wang, Research Director, Gretar Tryggvason , Committee Member, Eric Jumper, Research Director, Kenneth Christensen, Committee Member.

Subjects/Keywords: Electromagnetic Wave Propagation; Turbulence; Adaptive Optics; Computational Fluid Mechanics; Computational Aero-Optics; Aero-Optics

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APA (6^th Edition):

Mathews, E. (2017). Numerical and Theoretical Analysis of Aero-Optics with Application to an Optical Turret</h1>. (Doctoral Dissertation). University of Notre Dame. Retrieved from https://curate.nd.edu/show/3197xk83k9c

Chicago Manual of Style (16^th Edition):

Mathews, Edwin. “Numerical and Theoretical Analysis of Aero-Optics with Application to an Optical Turret</h1>.” 2017. Doctoral Dissertation, University of Notre Dame. Accessed April 07, 2020. https://curate.nd.edu/show/3197xk83k9c.

MLA Handbook (7^th Edition):

Mathews, Edwin. “Numerical and Theoretical Analysis of Aero-Optics with Application to an Optical Turret</h1>.” 2017. Web. 07 Apr 2020.

Vancouver:

Mathews E. Numerical and Theoretical Analysis of Aero-Optics with Application to an Optical Turret</h1>. [Internet] [Doctoral dissertation]. University of Notre Dame; 2017. [cited 2020 Apr 07]. Available from: https://curate.nd.edu/show/3197xk83k9c.

Council of Science Editors:

Mathews E. Numerical and Theoretical Analysis of Aero-Optics with Application to an Optical Turret</h1>. [Doctoral Dissertation]. University of Notre Dame; 2017. Available from: https://curate.nd.edu/show/3197xk83k9c

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