subject:( Numerical modeling)

Dalhousie University

1. Butler, Jared P. Crustal subduction and the exhumation of (ultra)high-pressure terranes: contrasting modes with examples from the Alps and Caledonides.

Degree: PhD, Department of Earth Sciences, 2013, Dalhousie University

URL: http://hdl.handle.net/10222/35397

► The widespread recognition of (ultra)high-pressure ((U)HP) metamorphic rocks in orogens worldwide suggests that subduction and exhumation of crustal rocks from mantle depths are normal processes… (more)

▼ The widespread recognition of (ultra)high-pressure ((U)HP) metamorphic rocks in orogens worldwide suggests that subduction and exhumation of crustal rocks from mantle depths are normal processes at convergent plate margins. However, the dynamics of these processes, in particular the comparative roles of erosion and crustal extension, and the driving forces of extension during (U)HP rock exhumation, remain controversial. This thesis presents numerical modeling and field/analytical studies that address the geodynamics of crustal subduction and exhumation in two intensely studied orogens, the Alps and the Caledonides. The 2D numerical models show how different scales and durations of orogeny and plate motions can lead to marked contrasts in the style of orogenic growth, crustal subduction, and (U)HP exhumation. In the Western Alps, rapid exhumation (1-3 cm/a) can be explained by local, syn-orogenic extension driven by the buoyant ascent of deforming (U)HP crust from the subduction channel. Later trans-crustal exhumation probably resulted from the combined effects of syn-convergent thrusting, local extension, and erosion. The low temperatures (500-700°C) of Alpine (U)HP metamorphism are attributable to the small size of the orogen and short duration of subduction/exhumation. Contrary to recent suggestions, neither erosion nor absolute extension is required to explain (U)HP exhumation in the Alps. The Western Gneiss Region (WGR) (Norwegian Caledonides), in contrast, can be explained by subduction to (U)HP conditions followed by plate divergence. Gravitational spreading of a thick, hot orogenic wedge leads to a short period of coeval thrusting and extension. Exhumation of (U)HP crust from the subduction channel is achieved by normal-sense shearing along the top of the (U)HP terrane, with minor associated shortening. Trans-crustal exhumation by vertical thinning of the orogenic wedge results from continued absolute extension and erosion. The comparatively high temperatures (700-800°C) achieved by Caledonian (U)HP rocks reflect the orogen's greater size, slower exhumation rates, and possible stalling of the (U)HP terrane at depth. These contrasting models underscore the variety of possible mechanisms responsible for (U)HP exhumation, and represent new benchmarks in the understanding of Alpine and Caledonian tectonics and (U)HP rock exhumation in general. Advisors/Committee Members: Romain Bousquet (external-examiner), Nicholas Culshaw (graduate-coordinator), Djordje Grujic (thesis-reader), Nicholas Culshaw (thesis-reader), Christopher Beaumont and Rebecca A. Jamieson (thesis-supervisor), Not Applicable (ethics-approval), Yes (manuscripts), Yes (copyright-release).

Subjects/Keywords: metamorphism; tectonics; geodynamics; numerical modeling

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APA (6^th Edition):

Butler, J. P. (2013). Crustal subduction and the exhumation of (ultra)high-pressure terranes: contrasting modes with examples from the Alps and Caledonides. (Doctoral Dissertation). Dalhousie University. Retrieved from http://hdl.handle.net/10222/35397

Chicago Manual of Style (16^th Edition):

Butler, Jared P. “Crustal subduction and the exhumation of (ultra)high-pressure terranes: contrasting modes with examples from the Alps and Caledonides.” 2013. Doctoral Dissertation, Dalhousie University. Accessed December 09, 2019. http://hdl.handle.net/10222/35397.

MLA Handbook (7^th Edition):

Butler, Jared P. “Crustal subduction and the exhumation of (ultra)high-pressure terranes: contrasting modes with examples from the Alps and Caledonides.” 2013. Web. 09 Dec 2019.

Vancouver:

Butler JP. Crustal subduction and the exhumation of (ultra)high-pressure terranes: contrasting modes with examples from the Alps and Caledonides. [Internet] [Doctoral dissertation]. Dalhousie University; 2013. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/10222/35397.

Council of Science Editors:

Butler JP. Crustal subduction and the exhumation of (ultra)high-pressure terranes: contrasting modes with examples from the Alps and Caledonides. [Doctoral Dissertation]. Dalhousie University; 2013. Available from: http://hdl.handle.net/10222/35397

Texas A&M University

2. Tankala, Chandan. Numerical Analysis on the Generation of Equilibrium Aeolian Sedimentary Bed-Forms From Random Surfaces.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11532

► The formation of aeolian ripples has been modeled, quite successfully, using discrete approaches like cellular automaton models. Numerical analysis of continuum models to obtain similar… (more)

Subjects/Keywords: Aeolian Sediment Transport; Numerical Modeling

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APA (6^th Edition):

Tankala, C. (2012). Numerical Analysis on the Generation of Equilibrium Aeolian Sedimentary Bed-Forms From Random Surfaces. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11532

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):

Tankala, Chandan. “Numerical Analysis on the Generation of Equilibrium Aeolian Sedimentary Bed-Forms From Random Surfaces.” 2012. Thesis, Texas A&M University. Accessed December 09, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11532.

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

MLA Handbook (7^th Edition):

Tankala, Chandan. “Numerical Analysis on the Generation of Equilibrium Aeolian Sedimentary Bed-Forms From Random Surfaces.” 2012. Web. 09 Dec 2019.

Vancouver:

Tankala C. Numerical Analysis on the Generation of Equilibrium Aeolian Sedimentary Bed-Forms From Random Surfaces. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11532.

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

Council of Science Editors:

Tankala C. Numerical Analysis on the Generation of Equilibrium Aeolian Sedimentary Bed-Forms From Random Surfaces. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11532

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

Texas A&M University

3. Luo, Jun. Engineering, Financial and Net Energy Performance, and Risk Analysis for Parabolic Trough Solar Power Plants.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153467

► An investigation was conducted to determine how technology innovations, potential risks, plant configuration and size, operating strategy, and financial incentives affect the electricity output, financial… (more)

Subjects/Keywords: Concentrating solar power; numerical modeling

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APA (6^th Edition):

Luo, J. (2014). Engineering, Financial and Net Energy Performance, and Risk Analysis for Parabolic Trough Solar Power Plants. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153467

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):

Luo, Jun. “Engineering, Financial and Net Energy Performance, and Risk Analysis for Parabolic Trough Solar Power Plants.” 2014. Thesis, Texas A&M University. Accessed December 09, 2019. http://hdl.handle.net/1969.1/153467.

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

MLA Handbook (7^th Edition):

Luo, Jun. “Engineering, Financial and Net Energy Performance, and Risk Analysis for Parabolic Trough Solar Power Plants.” 2014. Web. 09 Dec 2019.

Vancouver:

Luo J. Engineering, Financial and Net Energy Performance, and Risk Analysis for Parabolic Trough Solar Power Plants. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/1969.1/153467.

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

Council of Science Editors:

Luo J. Engineering, Financial and Net Energy Performance, and Risk Analysis for Parabolic Trough Solar Power Plants. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153467

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

Louisiana State University

4. Basyal, Gyan Prasad. Comparison of Land Building by Mississippi River Diversion Using One and Two Dimensional Numerical Models.

Degree: MSCE, Civil and Environmental Engineering, 2014, Louisiana State University

URL: etd-07142014-131712 ; https://digitalcommons.lsu.edu/gradschool_theses/2385

► River sediment diversions have been identified as one strategy for creating new land and offsetting Mississippi River delta plain land loss. Numerical modeling is one… (more)

▼ River sediment diversions have been identified as one strategy for creating new land and offsetting Mississippi River delta plain land loss. Numerical modeling is one tool for estimating the amount of land, geomorphic features and ecological benefits from diversions. There are a number of models proposed to estimate sediment diversion land building, ranging from simplistic approaches that provide bulk characteristics and use little computational resources to process-based models that require a large amount of input parameters and computing power. This thesis aims to compare and contrast two approaches to simulating the land building processes in a simplified receiving basin: a 1D spatially averaged model; and a horizontal 2D, process-based Delft3D model. Four scenarios were run: three with varying amounts of non-cohesive sediment; and one with a mixture of non-cohesive and cohesive sediment. A number of simplifying assumptions were made for more direct comparisons of the bulk and detailed delta properties and the computational resources. These included the bulking of cohesive and non-cohesive sediments on deposition are assumed equal; erosion below the pre-delta strata is not allowed; and the river sediment diversion operates continuously at a given flow and sediment concentration. Note that this last assumption was made for easier model comparisons and not how any proposed diversions would be operated. Distributary channel network information, missing in the 1D model but important for ecohydrological processes, is extracted from the 2D model. The 1D model took less than one minute to simulate the same scenario that required over 20 hours on 32 processors using the 2D model. Results showed the 1D model delta radii and areas were always larger, but relatively close, to those simulated by the 2D model, particularly for non-cohesive sediments. The deltas formed from solely non-cohesive sediments had numerous short, but wide, channels and were roughly fan shaped, thus justifying the radial symmetry assumption of the 1D model. The ratios of the 2D to 1D model delta areas were 70% and 55% for non-cohesive and mixed scenarios, respectively. The 2D model results showed that presence of cohesive sediment promoted narrower and weakly sinuous channels that affect delta growth dynamics and result in increased vertical aggradation, thus limiting the area of land built.

Subjects/Keywords: numerical modeling; delta models

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APA (6^th Edition):

Basyal, G. P. (2014). Comparison of Land Building by Mississippi River Diversion Using One and Two Dimensional Numerical Models. (Masters Thesis). Louisiana State University. Retrieved from etd-07142014-131712 ; https://digitalcommons.lsu.edu/gradschool_theses/2385

Chicago Manual of Style (16^th Edition):

Basyal, Gyan Prasad. “Comparison of Land Building by Mississippi River Diversion Using One and Two Dimensional Numerical Models.” 2014. Masters Thesis, Louisiana State University. Accessed December 09, 2019. etd-07142014-131712 ; https://digitalcommons.lsu.edu/gradschool_theses/2385.

MLA Handbook (7^th Edition):

Basyal, Gyan Prasad. “Comparison of Land Building by Mississippi River Diversion Using One and Two Dimensional Numerical Models.” 2014. Web. 09 Dec 2019.

Vancouver:

Basyal GP. Comparison of Land Building by Mississippi River Diversion Using One and Two Dimensional Numerical Models. [Internet] [Masters thesis]. Louisiana State University; 2014. [cited 2019 Dec 09]. Available from: etd-07142014-131712 ; https://digitalcommons.lsu.edu/gradschool_theses/2385.

Council of Science Editors:

Basyal GP. Comparison of Land Building by Mississippi River Diversion Using One and Two Dimensional Numerical Models. [Masters Thesis]. Louisiana State University; 2014. Available from: etd-07142014-131712 ; https://digitalcommons.lsu.edu/gradschool_theses/2385

5. Renström, Viktor. The influence of weakness zones on the tunnel stability based on investigations in Bodøtunnelen.

Degree: Mining and Geotechnical Engineering, 2016, Luleå University of Technology

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59939

► When planning for a tunnel, the ground conditions in which the tunnel is going to be excavated through will be investigated to different extent.… (more)

▼ When planning for a tunnel, the ground conditions in which the tunnel is going to be excavated through will be investigated to different extent. Lack of relevant pre-investigation data or misinterpretations of the available data can cause both economical and/or unexpected stability problems. Weakness zones that are expected to cross the tunnel could be investigated thoroughly with a variety of methods. Refraction seismicity survey and 2D resistivity survey are two geophysical methods that are common in Norway for obtaining information about the rock quality in weakness zones. In this work, a twin tunnel under construction in Bodø (northern Norway) called the Bodøtunnel is studied. The predictions based on the pre-investigation for crossing of some expected weakness zones are compared to the actual conditions encountered during tunneling. Tunneling observations (Geological mapping and photos), rock samples and measurement while drilling (MWD) were used to describe the weakness zones that were encountered during tunneling. Rock samples were collected from two weakness zones and the general rock mass. These samples were tested in a point bearing machine for determination of their uniaxial compressive strength (UCS). These results indicated that the rock samples gathered from the weakness zones had significantly lower UCS than the samples from the rock mass. This was exceedingly clear for the samples of fault rock gathered in connection with a shear zone. The results from this work demonstrate that refraction seismicity had a high success rate for locating weakness zones, with the exception for the crossed narrow zones that were interpreted lacking a shear component. Empirical formulas relating Q-value and UCS with the seismic wave speed were used for calculating these factors for some interesting locations. The empirically calculated UCS was similar to the obtained UCS from the point bearing tests, while the empirically calculated Q-value showed large deviations from the mapped Q-value. The resistivity measurements had a low success rate so far in this project; the reason for this could be disturbances in the ground and the location of the resistivity profiles, which had to adapted to the nearby railroad. It should be noted that only one full resistivity profile has been crossed and the rest of the profiles are expected to be more accurate. Based on the results from the crossed profile(s), the suitability of resistivity survey 2D in urban areas can be brought to question. This work also stumbled upon problems regarding the definition of weakness zones. Shear/fault zones are one of the more common type of weakness zones encountered in tunneling. These kind of zones often consists of different parts. Depending on which parts are regarded as a weakness zone by the responsible engineers, the Q-value might differ due to the SRF. Different scenarios were also evaluated with numerical modeling for the expected remaining major weakness zones. This analysis highlights the importance of differentiation…

Subjects/Keywords: Rock mechanics; Numerical modeling

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APA (6^th Edition):

Renström, V. (2016). The influence of weakness zones on the tunnel stability based on investigations in Bodøtunnelen. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59939

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):

Renström, Viktor. “The influence of weakness zones on the tunnel stability based on investigations in Bodøtunnelen.” 2016. Thesis, Luleå University of Technology. Accessed December 09, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59939.

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

MLA Handbook (7^th Edition):

Renström, Viktor. “The influence of weakness zones on the tunnel stability based on investigations in Bodøtunnelen.” 2016. Web. 09 Dec 2019.

Vancouver:

Renström V. The influence of weakness zones on the tunnel stability based on investigations in Bodøtunnelen. [Internet] [Thesis]. Luleå University of Technology; 2016. [cited 2019 Dec 09]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59939.

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

Council of Science Editors:

Renström V. The influence of weakness zones on the tunnel stability based on investigations in Bodøtunnelen. [Thesis]. Luleå University of Technology; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59939

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

Delft University of Technology

6. Mou, Y. Study on the impacts of floating seaweed on wind waves:.

Degree: 2015, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d48b0cc0-dc60-4e73-a8f0-6b5cedc81896

► As human beings are becoming more and more aware of importance of the environment, resorts to clean energy have provoked great interest for the past… (more)

▼ As human beings are becoming more and more aware of importance of the environment, resorts to clean energy have provoked great interest for the past decades. As a sort of clean power, wind has been widely considered as an ideal energy source to generate electricity. That is why the offshore wind farm plans have been drawn up, specifically in North Sea in Europe. Besides, in order to comply with marine spatial planning which aims to make use of marine resources sustainably, seaweed aquaculture will also be operated among wind farm zone under wind turbines, which provides the food necessity for mankind. The introduction of seaweed aquaculture may have influences on local hydrodynamics as seaweed attenuates waves, which may further affect the environment. This effect has not been understood. Therefore this study is conducted to investigate the impact of seaweed aquaculture on wind waves. As a relatively young sector, few studies have been found on the effect of floating vegetation on waves. Since there is no ready-to-use hydrodynamic model which can deal with floating seaweed, it is required to set up a numerical model and calibrate this model with experimental data. In this research the wave modelling program SWAN is used owing to the fact that there exists a vegetation model in SWAN. In this model the vegetation is schematised as stiff cylinders mounted at the bottom. The energy dissipation by vegetation is calculated as work carried out by the drag force induced by cylinders. However, the function of this vegetation model in SWAN is somewhat different from what is required for this study. • Firstly, the SWAN deals with bottom-mounted vegetation while in this research floating vegetation is addressed. • Secondly, in SWAN model stiff objects are considered while in current research the vegetation possesses flexibility. With flexibility the drag force will become smaller as the relative velocity between water particle and vegetation gets smaller. On the other hand, the inertial force may have an impact on the wave energy dissipation. Considering these two differences, corresponding measures need to be taken to meet the requirement of this study. To model the floating vegetation, the original vegetation model has been modified. In the beginning, the floating vegetation model is achieved by dividing the vegetation into two vertical layers and making the lower layer virtual. There is drawback in this model: only flatbed can be applied. For sensitivity analysis and calibration this model works well, but it is not applicable in the case study as non-flat seabed is implemented in the model setup. It leads to a second modification in the SWAN model. The method is to alter the interval of integration of dissipation term by vegetation, which results in further change in the source code. To account for the flexibility, the bulk drag coefficient is adjusted. This parameter accommodates the influence of flexibility of vegetation and uncertainty of other parameters related to the model. To test this floating vegetation model… Advisors/Committee Members: Reniers, A.J.H.M., Schouten, J.J., Zijlema, M., Vuik, V., Cao, H.J..

Subjects/Keywords: floating seaweed; wave; numerical modeling

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APA (6^th Edition):

Mou, Y. (2015). Study on the impacts of floating seaweed on wind waves:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d48b0cc0-dc60-4e73-a8f0-6b5cedc81896

Chicago Manual of Style (16^th Edition):

Mou, Y. “Study on the impacts of floating seaweed on wind waves:.” 2015. Masters Thesis, Delft University of Technology. Accessed December 09, 2019. http://resolver.tudelft.nl/uuid:d48b0cc0-dc60-4e73-a8f0-6b5cedc81896.

MLA Handbook (7^th Edition):

Mou, Y. “Study on the impacts of floating seaweed on wind waves:.” 2015. Web. 09 Dec 2019.

Vancouver:

Mou Y. Study on the impacts of floating seaweed on wind waves:. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2019 Dec 09]. Available from: http://resolver.tudelft.nl/uuid:d48b0cc0-dc60-4e73-a8f0-6b5cedc81896.

Council of Science Editors:

Mou Y. Study on the impacts of floating seaweed on wind waves:. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:d48b0cc0-dc60-4e73-a8f0-6b5cedc81896

University of Illinois – Urbana-Champaign

7. Kaufeld, Wendilyn J. Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model.

Degree: MS, 0334, 2010, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/16184

► As the formative agents of cloud droplets, aerosols play an undeniably important role in the development of clouds and precipitation. Few meteorological models have been… (more)

▼ As the formative agents of cloud droplets, aerosols play an undeniably important role in the development of clouds and precipitation. Few meteorological models have been developed or adapted to simulate aerosols and their contribution to cloud and precipitation processes. The Weather Research and Forecasting model (WRF) has recently been coupled with an atmospheric chemistry suite and is jointly referred to as WRF-Chem, allowing atmospheric chemistry and meteorology to influence each other’s evolution within a mesoscale modeling framework. Provided that the model physics are robust, this framework allows the feedbacks between aerosol chemistry, cloud physics, and dynamics to be investigated. This study focuses on the effects of aerosols on meteorology, specifically, the interaction of aerosol chemical species with microphysical processes represented within the framework of the WRF-Chem. Aerosols are represented by eight size bins using the Model for Simulating Aerosol Interactions and Chemistry (MOSAIC) sectional parameterization, which is linked to the Purdue Lin bulk microphysics scheme. The aim of this study is to examine the sensitivity of deep convective precipitation modeled by the 2D WRF-Chem to varying aerosol number concentration and aerosol type. A systematic study has been performed regarding the effects of aerosols on parameters such as total precipitation, updraft/downdraft speed, distribution of hydrometeor species, and organizational features, within idealized maritime and continental thermodynamic environments. Initial results were obtained using WRFv3.0.1, and a second series of tests were run using WRFv3.2 after several changes to the activation, autoconversion, and Lin et al. microphysics schemes added by the WRF community, as well as the implementation of prescribed vertical levels by the author. The results of WRFv3.2 runs contrasted starkly with WRFv3.0.1 runs. The WRFv3.0.1 runs produced a propagating system resembling a developing squall line, whereas the WRFv3.2 runs did not. The response of total precipitation, updraft/downdraft speeds, and system organization to increasing aerosol concentrations were opposite between runs with different versions of WRF. Results of the WRFv3.2 runs, however, were in better agreement in timing and magnitude of vertical velocity and hydrometeor content with a WRFv3.0.1 run using single-moment Lin et al. microphysics, than WRFv3.0.1 runs with chemistry. One result consistent throughout all simulations was an inhibition in warm-rain processes due to enhanced aerosol concentrations, which resulted in a delay of precipitation onset that ranged from 2-3 minutes in WRFv3.2 runs, and up to 15 minutes in WRFv.3.0.1 runs. This result was not observed in a previous study by Ntelekos et al. (2009) using the WRF-Chem, perhaps due to their use of coarser horizontal and vertical resolution within their experiment. The changes to microphysical processes such as activation and autoconversion from WRFv3.0.1 to WRFv3.2, along with changes in the packing of vertical levels,… Advisors/Committee Members: Nesbitt, Stephen W. (advisor).

Subjects/Keywords: Aerosol; Convection; Meteorology; Numerical modeling

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APA (6^th Edition):

Kaufeld, W. J. (2010). Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/16184

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):

Kaufeld, Wendilyn J. “Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model.” 2010. Thesis, University of Illinois – Urbana-Champaign. Accessed December 09, 2019. http://hdl.handle.net/2142/16184.

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

MLA Handbook (7^th Edition):

Kaufeld, Wendilyn J. “Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model.” 2010. Web. 09 Dec 2019.

Vancouver:

Kaufeld WJ. Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2010. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/2142/16184.

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

Council of Science Editors:

Kaufeld WJ. Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model. [Thesis]. University of Illinois – Urbana-Champaign; 2010. Available from: http://hdl.handle.net/2142/16184

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

Colorado School of Mines

8. Tijerina, Danielle T. Improving U.S. national water modeling : an intercomparison of two high-resolution, continental scale models, ParFlow-CONUS and the National Water Model v1.2 configuration of WRF-Hydro.

Degree: MS(M.S.), Geology and Geological Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172400

► Development of integrated hydrology modeling systems, where subsurface, land-surface, and energy budget processes are represented, is an increasing trend. In hydrologic science, there is a… (more)

Subjects/Keywords: Hydrology; Continental; Numerical modeling

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APA (6^th Edition):

Tijerina, D. T. (2018). Improving U.S. national water modeling : an intercomparison of two high-resolution, continental scale models, ParFlow-CONUS and the National Water Model v1.2 configuration of WRF-Hydro. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172400

Chicago Manual of Style (16^th Edition):

Tijerina, Danielle T. “Improving U.S. national water modeling : an intercomparison of two high-resolution, continental scale models, ParFlow-CONUS and the National Water Model v1.2 configuration of WRF-Hydro.” 2018. Masters Thesis, Colorado School of Mines. Accessed December 09, 2019. http://hdl.handle.net/11124/172400.

MLA Handbook (7^th Edition):

Tijerina, Danielle T. “Improving U.S. national water modeling : an intercomparison of two high-resolution, continental scale models, ParFlow-CONUS and the National Water Model v1.2 configuration of WRF-Hydro.” 2018. Web. 09 Dec 2019.

Vancouver:

Tijerina DT. Improving U.S. national water modeling : an intercomparison of two high-resolution, continental scale models, ParFlow-CONUS and the National Water Model v1.2 configuration of WRF-Hydro. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/11124/172400.

Council of Science Editors:

Tijerina DT. Improving U.S. national water modeling : an intercomparison of two high-resolution, continental scale models, ParFlow-CONUS and the National Water Model v1.2 configuration of WRF-Hydro. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172400

Virginia Tech

9. Jayne Jr, Richard Scott. Implications of permeability uncertainty within engineered geologic fluid systems.

Degree: PhD, Geosciences, 2019, Virginia Tech

URL: http://hdl.handle.net/10919/94392

► The process of capturing CO2 from point-source emitters, such as power plants and injecting that CO2 into a geologic formation is one way to reduce… (more)

Subjects/Keywords: Permeability; CO2Sequestration; Numerical Modeling; Heterogeneity

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

APA (6^th Edition):

Jayne Jr, R. S. (2019). Implications of permeability uncertainty within engineered geologic fluid systems. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/94392

Chicago Manual of Style (16^th Edition):

Jayne Jr, Richard Scott. “Implications of permeability uncertainty within engineered geologic fluid systems.” 2019. Doctoral Dissertation, Virginia Tech. Accessed December 09, 2019. http://hdl.handle.net/10919/94392.

MLA Handbook (7^th Edition):

Jayne Jr, Richard Scott. “Implications of permeability uncertainty within engineered geologic fluid systems.” 2019. Web. 09 Dec 2019.

Vancouver:

Jayne Jr RS. Implications of permeability uncertainty within engineered geologic fluid systems. [Internet] [Doctoral dissertation]. Virginia Tech; 2019. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/10919/94392.

Council of Science Editors:

Jayne Jr RS. Implications of permeability uncertainty within engineered geologic fluid systems. [Doctoral Dissertation]. Virginia Tech; 2019. Available from: http://hdl.handle.net/10919/94392

Penn State University

10. Li, Shuangcai. INTEGRATED MODELING OF MULTI-SCALE HYDRODYNAMICS, SEDIMENT AND POLLUTANT TRANSPORT.

Degree: PhD, Civil Engineering, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/9062

► Modeling hydrodynamics, sediment and pollutant transport over a wide range of spatial scales and hydrological events (e.g., inland flood and storm surges) remains a fundamental… (more)

▼ Modeling hydrodynamics, sediment and pollutant transport over a wide range of spatial scales and hydrological events (e.g., inland flood and storm surges) remains a fundamental impediment to flood risk prediction, water resources management, and environmental protection. In addition, forecasting of extreme hydrologic events caused by severe weather and climate change [Milly et al., 2002] is a growing challenge. The goal of this study is to develop a modeling system appropriate to predict the multiple scale hydrodynamics, sediment and pollutant transport as well as extreme hydrological events for rivers, floodplains, coastal areas and their watersheds. Two major contributions are made in this dissertation. First, a two-dimensional (2-D) finite volume model (PIHM-Hydro) was developed to fully couple the hydrodynamics, pollutant transport, and sediment transport at the scale of river, floodplain, and coastal area. This is the first 2-D high-order model to fully couple shallow water flow and sediment transport in the successful simulation of a real flow field. The model is based on standard upwind finite volume methods using Roe’s and HLL approximate Riemann solvers on unstructured triangular grids. A multidimensional linear reconstruction technique and multidimensional slope limiter were implemented to achieve second-order spatial accuracy. Model efficiency and stability are treated using an explicit-implicit method for temporal discretization with operator splitting. The advantages of the present model are that (1) it can handle complicated geometry by using the Delaunay triangulation based on Shewchuk’s algorithm; (2) it is capable of producing accurate and stable solutions over a wide range of spatial scales and hydrological events such as discontinuous flow and wetting/drying process by using the approximate Riemann solver and the semi-implicit time integration technique based on the CVODE; and (3) it can accurately simulate the interactions of hydrodynamics, sediment transport and pollutant transport by fully coupling these processes physically and numerically. These advantages of PIHM-Hydro have been illustrated by its successful application on the test cases where multiscale physical processes are dominant over a wide range of spatial scales. The second contribution of this dissertation is to develop a spatially-distributed physically-based sediment transport modeling component at the watershed scale (PIHM-Sed) which is fully coupled with the hydrological processes within the Penn State Integrated Hydrologic Model system (PIHM) [Qu and Duffy, 2007]. This is the first spatially-distributed physically-based model to “fully-couple” hydrology and sediment transport in terms of physical and numerical coupling. It integrates the hillslope and channel processes, and is capable of predicting major surface/subsurface hydrological processes, sediment yield as well as spatial distribution of erosion/deposition. For the hillslope, the erosion processes of rain splash and sediment transport by overland flow are simulated; for…

Subjects/Keywords: flood modeling; hydrological modeling; numerical modeling; sediment transport; pollutant transport; PIHM

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

APA (6^th Edition):

Li, S. (2008). INTEGRATED MODELING OF MULTI-SCALE HYDRODYNAMICS, SEDIMENT AND POLLUTANT TRANSPORT. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/9062

Chicago Manual of Style (16^th Edition):

Li, Shuangcai. “INTEGRATED MODELING OF MULTI-SCALE HYDRODYNAMICS, SEDIMENT AND POLLUTANT TRANSPORT.” 2008. Doctoral Dissertation, Penn State University. Accessed December 09, 2019. https://etda.libraries.psu.edu/catalog/9062.

MLA Handbook (7^th Edition):

Li, Shuangcai. “INTEGRATED MODELING OF MULTI-SCALE HYDRODYNAMICS, SEDIMENT AND POLLUTANT TRANSPORT.” 2008. Web. 09 Dec 2019.

Vancouver:

Li S. INTEGRATED MODELING OF MULTI-SCALE HYDRODYNAMICS, SEDIMENT AND POLLUTANT TRANSPORT. [Internet] [Doctoral dissertation]. Penn State University; 2008. [cited 2019 Dec 09]. Available from: https://etda.libraries.psu.edu/catalog/9062.

Council of Science Editors:

Li S. INTEGRATED MODELING OF MULTI-SCALE HYDRODYNAMICS, SEDIMENT AND POLLUTANT TRANSPORT. [Doctoral Dissertation]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/9062

Dalhousie University

11. Cui, Yan. NUMERICAL AND EXPERIMENTAL STUDY OF GROUTED ROCK BOLTS AND THEIR DEFECTS USING ULTRASONIC GUIDED WAVES.

Degree: PhD, Department of Civil Engineering, 2013, Dalhousie University

URL: http://hdl.handle.net/10222/22018

► A rock bolt installed in field has only one short exposed end on the rock surface. This condition has posed challenges in field instrumentation and… (more)

▼ A rock bolt installed in field has only one short exposed end on the rock surface. This condition has posed challenges in field instrumentation and made it difficult to use the ultrasonic guided wave method for rock bolt monitoring. In rock bolt laboratory tests using ultrasonic guided waves, the input and receiving transducers are typically installed at the two exposed ends of a bolt. This is suitable to laboratory conditions but not practical in the field because one of the ends of a rock bolt is embedded in the rock mass. A method needs to be found to install the receiving transducer at a suitable location in the field for receiving valid wave data. In this thesis, a practical approach is proposed for conducting field tests with the installation of the receiving transducer on the grout surface near the exposed end of the bolt. The effects of the installation location of the receiving transducer are studied with numerical modeling. Experiments are conducted to verify the numerical modeling results. The results indicate that the data obtained from the receiving transducer installed on the grout surface at a proper location are representative and can be analyzed through the established correlations to determine the required parameters. Previous researches have mostly focused on the feasibility of the ultrasonic guided wave method for rock bolt tests and on the behavior of ultrasonic guided waves of fully grouted rock bolts in laboratory conditions. No further study has been performed to identify the grout defects in grouted rock bolts. Adequate understanding of the behaviour of ultrasonic guided waves in rock bolts with defects is therefore prerequisite for this method to be applied in practice. This thesis investigates the effects of some typical defects (e.g., an insufficient rebar length, a missing grout at the ground end, and a void in grout) in grouted rock bolts using the developed field measurement method and numerical modeling. The results are verified by laboratory tests using the equipment set-up established in this research. The results indicate that it is practically possible to identify those grout defects using ultrasonic guided waves. Advisors/Committee Members: Dr. ManChen Ge (external-examiner), Dr. Lei Liu (graduate-coordinator), Dr. Farid Taheir (thesis-reader), Dr. Dmitry Garagah (thesis-reader), Dr. Steve Zou (thesis-supervisor), Not Applicable (ethics-approval), Not Applicable (manuscripts), Not Applicable (copyright-release).

Subjects/Keywords: Numerical modeling; Rock bolt; Guided wave

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APA (6^th Edition):

Cui, Y. (2013). NUMERICAL AND EXPERIMENTAL STUDY OF GROUTED ROCK BOLTS AND THEIR DEFECTS USING ULTRASONIC GUIDED WAVES. (Doctoral Dissertation). Dalhousie University. Retrieved from http://hdl.handle.net/10222/22018

Chicago Manual of Style (16^th Edition):

Cui, Yan. “NUMERICAL AND EXPERIMENTAL STUDY OF GROUTED ROCK BOLTS AND THEIR DEFECTS USING ULTRASONIC GUIDED WAVES.” 2013. Doctoral Dissertation, Dalhousie University. Accessed December 09, 2019. http://hdl.handle.net/10222/22018.

MLA Handbook (7^th Edition):

Cui, Yan. “NUMERICAL AND EXPERIMENTAL STUDY OF GROUTED ROCK BOLTS AND THEIR DEFECTS USING ULTRASONIC GUIDED WAVES.” 2013. Web. 09 Dec 2019.

Vancouver:

Cui Y. NUMERICAL AND EXPERIMENTAL STUDY OF GROUTED ROCK BOLTS AND THEIR DEFECTS USING ULTRASONIC GUIDED WAVES. [Internet] [Doctoral dissertation]. Dalhousie University; 2013. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/10222/22018.

Council of Science Editors:

Cui Y. NUMERICAL AND EXPERIMENTAL STUDY OF GROUTED ROCK BOLTS AND THEIR DEFECTS USING ULTRASONIC GUIDED WAVES. [Doctoral Dissertation]. Dalhousie University; 2013. Available from: http://hdl.handle.net/10222/22018

Texas A&M University

12. Hutschenreuter, Katie Lynn. Comparison of Results Using the Fine Resolution Environmental HydroDynamic Model with Laboratory PIV Analysis of Vortex Dynamics for Shallow Tidal Inlets.

Degree: 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/161586

► Tidal flows through inlets with vortex formation have long been of great environmental importance. The transport mechanisms between the bay and the ocean must be… (more)

Subjects/Keywords: Tidal vortices; numerical modeling; shallow flow

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APA (6^th Edition):

Hutschenreuter, K. L. (2017). Comparison of Results Using the Fine Resolution Environmental HydroDynamic Model with Laboratory PIV Analysis of Vortex Dynamics for Shallow Tidal Inlets. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161586

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):

Hutschenreuter, Katie Lynn. “Comparison of Results Using the Fine Resolution Environmental HydroDynamic Model with Laboratory PIV Analysis of Vortex Dynamics for Shallow Tidal Inlets.” 2017. Thesis, Texas A&M University. Accessed December 09, 2019. http://hdl.handle.net/1969.1/161586.

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

MLA Handbook (7^th Edition):

Hutschenreuter, Katie Lynn. “Comparison of Results Using the Fine Resolution Environmental HydroDynamic Model with Laboratory PIV Analysis of Vortex Dynamics for Shallow Tidal Inlets.” 2017. Web. 09 Dec 2019.

Vancouver:

Hutschenreuter KL. Comparison of Results Using the Fine Resolution Environmental HydroDynamic Model with Laboratory PIV Analysis of Vortex Dynamics for Shallow Tidal Inlets. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/1969.1/161586.

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

Council of Science Editors:

Hutschenreuter KL. Comparison of Results Using the Fine Resolution Environmental HydroDynamic Model with Laboratory PIV Analysis of Vortex Dynamics for Shallow Tidal Inlets. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161586

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

Texas A&M University

13. Ge, Jianchao. Fractional Diffusion Modeling of Electromagnetic Induction in Fractured Rocks.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153509

► The controlled-source electromagnetic (CSEM) technique is well-established for non-invasive geophysical survey. Due to the strong attenuation of earth materials to electromagnetic signals, the effective depth… (more)

▼ The controlled-source electromagnetic (CSEM) technique is well-established for non-invasive geophysical survey. Due to the strong attenuation of earth materials to electromagnetic signals, the effective depth of most CSEM surveys is restricted to 1-2 km, a zone where pores and fractures over various length scales are highly complicated. Spatial confinement of fluid or electric charge transport by the fractal geometry gives rise to interesting dynamic processes within the pore space and fractures, such as anomalous diffusion. Conventionally, CSEM data are interpreted in terms of a 1-D, 2-D or 3-D piecewise constant geological structure with uniform conductivity and thickness of each cell. A very fine grid, and hence a lot of computation time, are needed to build and evaluate a model that can explain the Earths actual 3D CSEM response. Good accuracy may not be captured, using the conventional approach, in the presence of multi-scale hierarchical geoelectrical structure. Alternatively, the CSEM response of such structures are easily evaluated if the physics of anomalous diffusion of electromagnetic eddy currents is recognized and cast, for example, in terms of a continuous time random walk. Such a re-formulation leads to a generalization of Maxwell equations containing a fractional order time derivative. The fractional order of the derivative is equivalent to a roughening of the geological medium, introducing multi-scale variations of fractures and heterogeneities in a compact manner. This theory renders CSEM modeling and inversion much more efficient, as only a few model parameters are now required to be fit. However the EM fractional diffusion theory is far from perfect, e.g. the correlation between the roughness of a fracture model with its fracture properties. In this research, I use numerical modeling tool to answer this question and explore if classical piece-wise constant conductivity model can generate a fractional type response. In this thesis, I will review the fundamental theory of traditional CSEM survey technique and the continuous time random walk approach, and review the derivation of the generalized Maxwell equation. More importantly, I propose the finite difference method to discrete the generalized Maxwell equation in 2D and 3D. I explore a classical fractured model response created from the von Karman random media approach. I will show that the von Karman fractured model generates a classical type response which is inconsistent with the fractional diffusion response. It is difficult to generate a classical model numerically that is comparable with the rough natural model. Advisors/Committee Members: Everett, Mark E (advisor), Gibson, Richard L. (committee member), Sun, Yuefeng (committee member), Pilant, Michael S (committee member), Zhan, Hongbin (committee member).

Subjects/Keywords: CSEM; numerical modeling; fractional diffusion; finite difference

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APA (6^th Edition):

Ge, J. (2014). Fractional Diffusion Modeling of Electromagnetic Induction in Fractured Rocks. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153509

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):

Ge, Jianchao. “Fractional Diffusion Modeling of Electromagnetic Induction in Fractured Rocks.” 2014. Thesis, Texas A&M University. Accessed December 09, 2019. http://hdl.handle.net/1969.1/153509.

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

MLA Handbook (7^th Edition):

Ge, Jianchao. “Fractional Diffusion Modeling of Electromagnetic Induction in Fractured Rocks.” 2014. Web. 09 Dec 2019.

Vancouver:

Ge J. Fractional Diffusion Modeling of Electromagnetic Induction in Fractured Rocks. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/1969.1/153509.

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

Council of Science Editors:

Ge J. Fractional Diffusion Modeling of Electromagnetic Induction in Fractured Rocks. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153509

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

Anna University

14. Maran P. Numerical modeling and simulation of linear autogenous gta welding;.

Degree: Numerical modeling and simulation of linear autogenous gta welding, 2014, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/27268

►

Gas Tungsten Arc GTA welding has long been used to join newlinematerials in aerospace marine and nuclear power industries Variations in the newlineheat input during… (more)

Subjects/Keywords: linear autogenous; mechanical engineering; Numerical modeling

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APA (6^th Edition):

P, M. (2014). Numerical modeling and simulation of linear autogenous gta welding;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/27268

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):

P, Maran. “Numerical modeling and simulation of linear autogenous gta welding;.” 2014. Thesis, Anna University. Accessed December 09, 2019. http://shodhganga.inflibnet.ac.in/handle/10603/27268.

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

MLA Handbook (7^th Edition):

P, Maran. “Numerical modeling and simulation of linear autogenous gta welding;.” 2014. Web. 09 Dec 2019.

Vancouver:

P M. Numerical modeling and simulation of linear autogenous gta welding;. [Internet] [Thesis]. Anna University; 2014. [cited 2019 Dec 09]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/27268.

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

Council of Science Editors:

P M. Numerical modeling and simulation of linear autogenous gta welding;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/27268

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

Univerzitet u Beogradu

15. Vujadinović Mandić, Mirjam P. 1982-. Modeliranje hidrološkog ciklusa u integrisanom geofizičkom sistemu.

Degree: Fizički fakultet, 2016, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:11238/bdef:Content/get

►

Dinamička meteorologija / Dynamical meteorology

Hidrološki ciklus u integrisanom geofizičkom sistemu ima ulogu da simulira procese vezane za kopnene vode i međusobne interakcije komponenti klimatskog… (more)

Subjects/Keywords: hydrological cycle; geophysical system; numerical modeling

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APA (6^th Edition):

Vujadinović Mandić, M. P. 1. (2016). Modeliranje hidrološkog ciklusa u integrisanom geofizičkom sistemu. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:11238/bdef:Content/get

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):

Vujadinović Mandić, Mirjam P 1982-. “Modeliranje hidrološkog ciklusa u integrisanom geofizičkom sistemu.” 2016. Thesis, Univerzitet u Beogradu. Accessed December 09, 2019. https://fedorabg.bg.ac.rs/fedora/get/o:11238/bdef:Content/get.

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

MLA Handbook (7^th Edition):

Vujadinović Mandić, Mirjam P 1982-. “Modeliranje hidrološkog ciklusa u integrisanom geofizičkom sistemu.” 2016. Web. 09 Dec 2019.

Vancouver:

Vujadinović Mandić MP1. Modeliranje hidrološkog ciklusa u integrisanom geofizičkom sistemu. [Internet] [Thesis]. Univerzitet u Beogradu; 2016. [cited 2019 Dec 09]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:11238/bdef:Content/get.

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

Council of Science Editors:

Vujadinović Mandić MP1. Modeliranje hidrološkog ciklusa u integrisanom geofizičkom sistemu. [Thesis]. Univerzitet u Beogradu; 2016. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:11238/bdef:Content/get

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

The Ohio State University

16. Lee, Hwa Ok. Numerical Modeling of Electromagnetic Well-Logging Sensors.

Degree: PhD, Electrical and Computer Engineering, 2010, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1274981676

► In this dissertation, we develop time-domain numerical algorithms to model the electromagnetic responses of logging-while-drilling (LWD) tools in complex Earth formations. The increasing need… (more)

▼ In this dissertation, we develop time-domain numerical algorithms to model the electromagnetic responses of logging-while-drilling (LWD) tools in complex Earth formations. The increasing need to model complex features of realistic formations calls for the development of increasingly sophisticated and flexible numerical algorithms. The new algorithms proposed in this dissertation are based upon the finite-difference time-domain (FDTD) framework. FDTD is highly suited for the purposes because it is matrix-free and discretizes Maxwell's equations directly on a discrete grid of points, providing unparalleled flexibility in handing complex Earth media. In this dissertation, we employ FDTD directly in three-dimensional cylindrical coordinates, which suppress the staircasing error incurred when discretizing the cylindrical tool geometry, while keeping the method matrix-free. Another limitation of FDTD is its conditionally stability, which limits the maximum time increment that can be used on the marching-on-time algorithm. This maximum time increment is set up the Courant criterion and is proportional to the spatial cell size used. The Courant criteria leads to oversampling in time whenever a very fine spatial discretization is required. This implies excessive computation times. As an alternative to FDTD, the alternating direction implicit (ADI)-FDTD method offers unconditionally stability with little extra computation effort, which includes the need to solve a tridiagonal system at each time-step. In order to properly truncate the computational domain in the modeling of open-space problems, an absorbing boundary condition is also needed. Here, a convolutional perfectly-matched-layer (CPML) absorbing boundary condition based on a complex frequency shifted (CFS) stretching and recursive convolution is developed and implemented in the 3-D cylindrical ADI-FDTD algorithm. Because the time step size in the ADI-FDTD simulations cannot be increased arbitrarily due to numerical errors such as splitting errors and numerical (grid) dispersion, a complex-envelope (CE) technique is further incorporated into the ADI-FDTD algorithm. The cylindrical CE-ADI-FDTD makes it possible to reduce the overall computation time while maintaining the dispersion error at reasonable levels. In order to further reduce the computational time, this dissertation also develops a heterodyne approach for time-domain simulations in highly refined grids.The proposed approach is based on a complex-envelope algorithm with a carrier frequency and a complex-valued FDTD algorithm with a shifted spectrum centered at a higher simulation frequency. This corresponds to a shorter period and faster convergence for narrowband simulations. In practice, the logging tool axis is frequently misaligned with the borehole axis due to gravitational pull effects and/or mechanical vibrations.In addition, Earth media exhibits anisotropy which is represented by a full conductivity tensor during deviated drilling. The study of anisotropy and eccentricity is… Advisors/Committee Members: Teixeira, Fernando L. (Advisor).

Subjects/Keywords: Electromagnetism; numerical modeling; FDTD; well-logging

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

APA (6^th Edition):

Lee, H. O. (2010). Numerical Modeling of Electromagnetic Well-Logging Sensors. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1274981676

Chicago Manual of Style (16^th Edition):

Lee, Hwa Ok. “Numerical Modeling of Electromagnetic Well-Logging Sensors.” 2010. Doctoral Dissertation, The Ohio State University. Accessed December 09, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274981676.

MLA Handbook (7^th Edition):

Lee, Hwa Ok. “Numerical Modeling of Electromagnetic Well-Logging Sensors.” 2010. Web. 09 Dec 2019.

Vancouver:

Lee HO. Numerical Modeling of Electromagnetic Well-Logging Sensors. [Internet] [Doctoral dissertation]. The Ohio State University; 2010. [cited 2019 Dec 09]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1274981676.

Council of Science Editors:

Lee HO. Numerical Modeling of Electromagnetic Well-Logging Sensors. [Doctoral Dissertation]. The Ohio State University; 2010. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1274981676

Penn State University

17. Zeinijahromi, Mohamad. Development Of A Three-dimensional, Three-phase Coupled Model For Simulating Hydraulic Fracture Propagation And Long-term Recovery In Tight Gas Reservoirs.

Degree: PhD, Energy and Mineral Engineering, 2013, Penn State University

URL: https://etda.libraries.psu.edu/catalog/19717

► In the past decades, development of tight gas reservoirs has become more important. These low permeability reservoirs need to be stimulated effectively with hydraulic fracturing… (more)

▼ In the past decades, development of tight gas reservoirs has become more important. These low permeability reservoirs need to be stimulated effectively with hydraulic fracturing to produce economically. Stimulation design has improved with better understanding these unconventional reservoirs, advances in modeling and study of flow mechanisms. Conventional fracture propagation models predict fracture geometry based on fracture fluid mechanics, rock mechanics, petrophysics and empirical/analytical leak-off models. Reservoir flow simulators are then used to evaluate post-fracture well performances. These approaches are called de-coupled modeling. It is a challenge to couple these two processes, particularly when dealing with large amounts of input data. Furthermore decoupled modeling is a time-intensive job that requires a coordinated effort from stimulation and reservoir engineers. This approach may not work in low-permeability reservoirs because the hydraulic fracture propagation is complex, fracture fluid leak-off is pressure/reservoir/fracture dependent and there are changes in in-situ stress and permeability during and after a fracture treatment. It has been recognized that fluid loss can be computed directly by solving the multiphase flow equations in porous media. Such an approach is more general and does not have many of the assumptions in decoupled models. Models based on this approach are called coupled models. Hydraulic fracturing is an integrated process of injection of fracture fluid, fracture propagation, proppant transport, clean-up and multi-phase flow through the reservoir. Available coupled models are not fully integrated as they were developed to simulate just one or two of these steps. The main objective of this research is to develop an integrated coupled model which is capable of fully simulating reservoir flow, fracture propagation, proppant distribution, flowback, long term gas recovery and resulted stress change through a stationary reservoir/stress grid system. The model uses a three-dimensional, three-phase finite difference reservoir flow simulator coupled with a finite difference geomechanics model where both are applied on the same grid system. The model has been validated with published data in the literature. Using the developed model, parametric studies have been carried out to quantify important factors affecting fracture and recovery processes such as injection rate, treatment volume, proppant type, flowback rate and flowing bottom hole pressure (FBHP). The model enables us to simulate and compare different scenarios and suggest the optimized hydraulic fracturing design. The new findings lead to better understandings of hydraulic fracturing and well performances in tight gas reservoirs.

Subjects/Keywords: Numerical Modelilng; Hydraulic Fracturing Modeling; Reservoir Simulation

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

APA (6^th Edition):

Zeinijahromi, M. (2013). Development Of A Three-dimensional, Three-phase Coupled Model For Simulating Hydraulic Fracture Propagation And Long-term Recovery In Tight Gas Reservoirs. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/19717

Chicago Manual of Style (16^th Edition):

Zeinijahromi, Mohamad. “Development Of A Three-dimensional, Three-phase Coupled Model For Simulating Hydraulic Fracture Propagation And Long-term Recovery In Tight Gas Reservoirs.” 2013. Doctoral Dissertation, Penn State University. Accessed December 09, 2019. https://etda.libraries.psu.edu/catalog/19717.

MLA Handbook (7^th Edition):

Zeinijahromi, Mohamad. “Development Of A Three-dimensional, Three-phase Coupled Model For Simulating Hydraulic Fracture Propagation And Long-term Recovery In Tight Gas Reservoirs.” 2013. Web. 09 Dec 2019.

Vancouver:

Zeinijahromi M. Development Of A Three-dimensional, Three-phase Coupled Model For Simulating Hydraulic Fracture Propagation And Long-term Recovery In Tight Gas Reservoirs. [Internet] [Doctoral dissertation]. Penn State University; 2013. [cited 2019 Dec 09]. Available from: https://etda.libraries.psu.edu/catalog/19717.

Council of Science Editors:

Zeinijahromi M. Development Of A Three-dimensional, Three-phase Coupled Model For Simulating Hydraulic Fracture Propagation And Long-term Recovery In Tight Gas Reservoirs. [Doctoral Dissertation]. Penn State University; 2013. Available from: https://etda.libraries.psu.edu/catalog/19717

Penn State University

18. Frame, Jeffrey William. The Dynamical Influences of Cloud Shading on Supercell Thunderstorms.

Degree: PhD, Meteorology, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/9024

► Numerical simulations of supercell thunderstorms which include parameterized radiative transfer and surface fluxes are performed using the Advanced Regional Prediction System (ARPS) model. The tilted… (more)

▼ Numerical simulations of supercell thunderstorms which include parameterized radiative transfer and surface fluxes are performed using the Advanced Regional Prediction System (ARPS) model. The tilted independent column approximation (TICA) is adopted for use in the ARPS model because the existing method of parameterized radiative transfer, the independent column approximation (ICA), permits only the vertical transfer of shortwave radiation. The computed radiative fluxes from both the TICA and ICA are compared to output from a three-dimensional Monte Carlo radiative transfer solver and it is determined that the TICA fluxes more closely match those from the Monte Carlo model than do those from the ICA. Additionally, the TICA is able to capture the extensions of shadows that occur when the solar zenith angle deviates significantly from zero, which cannot be captured by the ICA. The maximum low-level air temperature deficits within the modeled cloud shadows is 1.5 to 2.0 K, which is only about half that previously observed. The loss of strong solar heating of the model surface within the shaded regions cools the surface temperatures, and changes the sign of the sensible heat flux near the edge of the shadow. This stabilizes the model surface layer and suppresses vertical mixing at low levels within the shaded area. This reduction in vertical mixing means that higher momentum air from aloft is prevented from mixing with air near the surface that has lost momentum to surface friction. The net result of this is a shallower, but more intense vertically-sheared layer near the surface. As the supercell's rear-flank gust front propagates into this modified shear layer, the layer of cold outflow air becomes shallower and it accelerates eastward. In the case of a stationary storm, the cold outflow undercuts the updraft and mesocyclone, depriving them of warm and moist inflow, and ultimately weakening the storm. These results are not likely applicable to all simulations of supercells with radiation because varying surface characteristics alter the amount of frictional drag experienced by the low-level flow. Additionally, the propagation of the rear-flank gust front is heavily modulated by both the strength and the location of the outflow, which are influenced by the choice of the storm-relative wind profile and the microphysics package. If shortwave radiation is excluded from the model, a shallow stable layer forms over the entire domain and the storm becomes elevated and weakens. The direct absorption and emission of radiation by clouds does not significantly affect the simulated supercells. The base-state environment is changed to see under which conditions cloud shading and friction combine to force the undercutting of the updraft. Neither a morning model initialization nor a cold season model initialization prevent this from occurring in any of the simulations which produce an anvil shadow. The ground-relative wind is also varied because the surface fluxes of both heat and momentum are not Galilean invariant. A storm in which…

Subjects/Keywords: numerical modeling; convection; radiative transfer; supercells

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APA (6^th Edition):

Frame, J. W. (2008). The Dynamical Influences of Cloud Shading on Supercell Thunderstorms. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/9024

Chicago Manual of Style (16^th Edition):

Frame, Jeffrey William. “The Dynamical Influences of Cloud Shading on Supercell Thunderstorms.” 2008. Doctoral Dissertation, Penn State University. Accessed December 09, 2019. https://etda.libraries.psu.edu/catalog/9024.

MLA Handbook (7^th Edition):

Frame, Jeffrey William. “The Dynamical Influences of Cloud Shading on Supercell Thunderstorms.” 2008. Web. 09 Dec 2019.

Vancouver:

Frame JW. The Dynamical Influences of Cloud Shading on Supercell Thunderstorms. [Internet] [Doctoral dissertation]. Penn State University; 2008. [cited 2019 Dec 09]. Available from: https://etda.libraries.psu.edu/catalog/9024.

Council of Science Editors:

Frame JW. The Dynamical Influences of Cloud Shading on Supercell Thunderstorms. [Doctoral Dissertation]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/9024

Louisiana State University

19. Muley, Pranjali D. Experimental and numerical investigation of pilot scale microwave assisted transesterification process for biodiesel production.

Degree: MSBAE, Engineering, 2011, Louisiana State University

URL: etd-02082012-092827 ; https://digitalcommons.lsu.edu/gradschool_theses/585

► The goal of this study was to design and test a pilot scale process for biodiesel production using advanced microwave technology and develop a numerical… (more)

▼ The goal of this study was to design and test a pilot scale process for biodiesel production using advanced microwave technology and develop a numerical model for investigating various parameters affecting this process. Dielectric properties of materials play a major role in microwave design of a process. The dielectric properties (dielectric constant ε’ and dielectric loss ε”) of biodiesel precursors: soybean oil, alcohols and catalyst and their different mixtures were measured at four different temperatures (30°C, 45°C, 60°C and 75°C) and in the frequency range of 154 MHz to 4.5 GHz. Results indicate that the microwave dielectric properties of almost all components depend on both temperature and frequency. Addition of catalyst changed the properties of solvent due to the strong ionic nature. A scaled up version of a continuous microwave transesterification process was designed, built and tested. Experimental parameters were set based on previous laboratory scale results. Experiments were performed in a well controlled continuous pilot scale microwave reactor at temperatures of 60°C and 75°C and processing times of 5 to 15 minutes. Microwave power required to achieve the temperature of 60°C was 4000W and for 75°C was 4700W. Ethanol was used as a solvent with NaOH as a catalyst (< 0.2% by weight of oil). The conversion obtained was >99% for all experimental conditions. The final objective was to develop a basic numerical model of continuous electromagnetic heating of biodiesel precursors. A finite element model was built using COMSOL Multiphysics 4.2 software. High frequency electromagnetic problem was coupled with the non-isothermal flow problem. The model was tested for the two different power levels. The electric field, electromagnetic power flow and temperature profiles were studied. Resulting temperature profiles were verified by comparing to the experimental data. The presented study assists in understanding microwave heating application for biodiesel production. The dielectric property analysis gives a clear picture of interaction of biodiesel components with microwave irradiation, numerical model aids in understanding temperature distribution while experiments validate the results. This study can be applied to optimize the microwave assisted continuous biodiesel production process.

Subjects/Keywords: Numerical Modeling; Biodiesel; Dielectric Properties; Microwave Processing

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APA (6^th Edition):

Muley, P. D. (2011). Experimental and numerical investigation of pilot scale microwave assisted transesterification process for biodiesel production. (Masters Thesis). Louisiana State University. Retrieved from etd-02082012-092827 ; https://digitalcommons.lsu.edu/gradschool_theses/585

Chicago Manual of Style (16^th Edition):

Muley, Pranjali D. “Experimental and numerical investigation of pilot scale microwave assisted transesterification process for biodiesel production.” 2011. Masters Thesis, Louisiana State University. Accessed December 09, 2019. etd-02082012-092827 ; https://digitalcommons.lsu.edu/gradschool_theses/585.

MLA Handbook (7^th Edition):

Muley, Pranjali D. “Experimental and numerical investigation of pilot scale microwave assisted transesterification process for biodiesel production.” 2011. Web. 09 Dec 2019.

Vancouver:

Muley PD. Experimental and numerical investigation of pilot scale microwave assisted transesterification process for biodiesel production. [Internet] [Masters thesis]. Louisiana State University; 2011. [cited 2019 Dec 09]. Available from: etd-02082012-092827 ; https://digitalcommons.lsu.edu/gradschool_theses/585.

Council of Science Editors:

Muley PD. Experimental and numerical investigation of pilot scale microwave assisted transesterification process for biodiesel production. [Masters Thesis]. Louisiana State University; 2011. Available from: etd-02082012-092827 ; https://digitalcommons.lsu.edu/gradschool_theses/585

Louisiana State University

20. Scherr, Thomas Foster. Numerical Investigation of Cryopreserved Zebrafish Sperm Cell Activation in Microchannels.

Degree: PhD, Chemical Engineering, 2014, Louisiana State University

URL: etd-04042014-211939 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1782

► This aim of this research project is to probe the activation process of zebrafish spermatozoa. Zebrafish are a model species for biological engineering applications, and… (more)

▼ This aim of this research project is to probe the activation process of zebrafish spermatozoa. Zebrafish are a model species for biological engineering applications, and the cryopreservation of their reproductive cells allows for inexpensive cataloging and maintenance of valuable biological material. Evaluation of cryopreservation protocols for aquatic sperm cells is typically accomplished by motility analysis after subjecting cells to a cryopreservation treatment. In zebrafish sperm cells, motility is initiated when cells come into contact with a hypo-osmotic environment. Subsequent activation analysis is currently done manually and brings with it an inherent difficulty and error. This process is slow and not ideal for high-throughput sample processing and analysis. As such, there is a critical need for an influx of enabling technologies to improve the throughput and optimization of these procedures. Microfluidics offers an intriguing solution to this problem. These devices, the size of a single 1-inch by 3-inch glass slide, offer automated, high-throughput, highly reproducible results. Additionally they utilize small sample volumes, which is important in minimizing valuable sample loss. Cells can be input into a micromixer which can rapidly dilute the extracellular environment, and then sent to an analysis chamber that acn determine the efficacy of a cryopreservation treatment. Despite its popularity in other fields, computational modeling of sperm cell activation has been nearly non-existent in literature. In this work, we model both the macroscopic aspects of particulate flow in a microchannel, and the microscopic mass transport across the cellular membrane. By tracking cells as they move throughout a simulated microdevice, we can find a history for each particle and predict cell outcomes. We are the first to introduce this combinatory model to the problem of cryoprotectant loading, where numerical modeling has well-established presence, and to the problem of zebrafish sperm cell activation. I envision the combination of microfluidics, with their controllable and reproducible flow patterns, and computational methods capturing both macro- and micro-transport, as two examples of the very enabling technologies that cryopreservation needs. While we apply these methods primarily to sperm cell analysis, the framework can be widely applied to a variety of cells and tissues.

Subjects/Keywords: numerical modeling; simulation; microfluidics; cryopreservation; transport phenomenon

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APA (6^th Edition):

Scherr, T. F. (2014). Numerical Investigation of Cryopreserved Zebrafish Sperm Cell Activation in Microchannels. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-04042014-211939 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1782

Chicago Manual of Style (16^th Edition):

Scherr, Thomas Foster. “Numerical Investigation of Cryopreserved Zebrafish Sperm Cell Activation in Microchannels.” 2014. Doctoral Dissertation, Louisiana State University. Accessed December 09, 2019. etd-04042014-211939 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1782.

MLA Handbook (7^th Edition):

Scherr, Thomas Foster. “Numerical Investigation of Cryopreserved Zebrafish Sperm Cell Activation in Microchannels.” 2014. Web. 09 Dec 2019.

Vancouver:

Scherr TF. Numerical Investigation of Cryopreserved Zebrafish Sperm Cell Activation in Microchannels. [Internet] [Doctoral dissertation]. Louisiana State University; 2014. [cited 2019 Dec 09]. Available from: etd-04042014-211939 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1782.

Council of Science Editors:

Scherr TF. Numerical Investigation of Cryopreserved Zebrafish Sperm Cell Activation in Microchannels. [Doctoral Dissertation]. Louisiana State University; 2014. Available from: etd-04042014-211939 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1782

University of Washington

21. MacInnes, Breanyn. Bridging seismology and geomorphology: investigations into the 2006 and 2007 Kuril Islands earthquakes and tsunamis.

Degree: 2010, University of Washington

URL: http://hdl.handle.net/1773/16358

► Numerous geophysical and geological observations of the 15 November 2006 and 13 January 2007 Kuril Island earthquake doublet and associated tsunamis help link earthquakes’ seismological… (more)

▼ Numerous geophysical and geological observations of the 15 November 2006 and 13 January 2007 Kuril Island earthquake doublet and associated tsunamis help link earthquakes’ seismological characteristics with tsunamis’ coastal effects. Expression of the tsunamis in the central Kurils remained unknown until post-tsunami surveys in summers of 2007 and 2008. Surveyed runup in 192 locations over a distance of 600 km averaged ~10 m, maximum ~20 m. Higher runup generally occurred along steep, protruding headlands, and longer inundation distances on lower, flatter coastal plains. As often observed but rarely measured in other cases, the Kuril tsunamis were dominantly erosional, while also leaving deposits. Pre- and post-tsunami surveys, including reoccupied topographic profiles, provide confidence to attribute changes to tsunami processes, in some cases to quantify these changes. Areas with low runup (<8 m) experienced limited geomorphic change, near the shore; regions with high runup (>15 m) experienced massive erosion. Where sandy beaches existed, sheetlike tsunami deposits reached ~90% of tsunami runup and inundation. The volume of eroded sediment far outweighed the amount deposited on land in all cases studied. The tsunamis eroded the beach landward, stripped vegetation, created scours and trim lines, cut through ridges, and plucked rocks from the soil. The effects were dominantly erosive because high-relief topography accelerated tsunami outflow. Post-tsunami surveys primarily found and measured only one tsunami wrackline, indicative of the largest onshore wave, with few clues as to which tsunami formed it. Simulations of tsunamis based on published slip distributions of both earthquakes using the numerical MOST model (Method of Splitting Tsunamis) help untangle the events. These simulations suggest that the larger tsunami in most places was 2006, but that 2007 was larger on Matua and parts of Rasshua islands. The effect of slip distribution on nearfield tsunami runup was investigated using a diversity of slip-distribution inversions. The slip distribution in outer-rise earthquakes like 2007 causes less variation in runup patterns than is the case in subduction-zone earthquakes like 2006. Differences in length and width of inversions’ subfaults also affect runup patterns when these differences affect up-dip or down-dip distribution of slip.

Subjects/Keywords: tsunami; numerical modeling; sedimentology; geomorphology; earthquake

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APA (6^th Edition):

MacInnes, B. (2010). Bridging seismology and geomorphology: investigations into the 2006 and 2007 Kuril Islands earthquakes and tsunamis. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/16358

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):

MacInnes, Breanyn. “Bridging seismology and geomorphology: investigations into the 2006 and 2007 Kuril Islands earthquakes and tsunamis.” 2010. Thesis, University of Washington. Accessed December 09, 2019. http://hdl.handle.net/1773/16358.

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

MLA Handbook (7^th Edition):

MacInnes, Breanyn. “Bridging seismology and geomorphology: investigations into the 2006 and 2007 Kuril Islands earthquakes and tsunamis.” 2010. Web. 09 Dec 2019.

Vancouver:

MacInnes B. Bridging seismology and geomorphology: investigations into the 2006 and 2007 Kuril Islands earthquakes and tsunamis. [Internet] [Thesis]. University of Washington; 2010. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/1773/16358.

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

Council of Science Editors:

MacInnes B. Bridging seismology and geomorphology: investigations into the 2006 and 2007 Kuril Islands earthquakes and tsunamis. [Thesis]. University of Washington; 2010. Available from: http://hdl.handle.net/1773/16358

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

22. Cohen, Ariel. Southeast U.S. Cold Season Severe Thunderstorm Environments and Their Depictions Using Multiple Planetary Boundary Layer Parameterization Schemes.

Degree: PhD, 2015, University of Oklahoma

URL: http://hdl.handle.net/11244/23328

► The primary motivations of this dissertation are to identify meteorological characteristics of the southeastern United States cold season tornado environment and to improve numerical modeling… (more)

▼ The primary motivations of this dissertation are to identify meteorological characteristics of the southeastern United States cold season tornado environment and to improve numerical modeling of such environments focused on the parameterization of the planetary boundary layer (PBL). This environment is particularly challenging for forecasters owing to the inherent marginality of one of the necessary conditions supporting thunderstorms: instability. Throughout the first portions of this work, both thermodynamic and kinematic parameters characteristic of the near-storm environment for southeast U.S. cold season tornadoes are found to be different relative to other environments. Numerous thermodynamic and kinematic parameters are found to be statistically significant in this regime, with relatively limited buoyancy and offsetting strong vertical wind shear. As such, this regime is sensitive to small variations in the assessment of buoyancy, of which a relatively greater proportion is concentrated in the low levels compared to other regimes. These findings, along with distinguishable behaviors of kinematic and thermodynamic parameters throughout the daytime heating and nighttime cooling cycles, motivate the need for more thorough investigation of PBL parameterization schemes in this particular regime. This work then proceeds with a discussion of PBL parameterization schemes and a focused investigation of the performance of nine different PBL schemes in the Southeast cold season severe weather environment by comparing simulated thermodynamic and kinematic profiles to observationally influenced ones. It is demonstrated that simultaneous representation of both nonlocal and local mixing is most appropriate for the southeast U.S. cold season tornado regime. For storm-relative helicity, strictly nonlocal schemes provide the greatest overall differences from observations (underforecast) in a mean sense. Meanwhile, strictly local schemes yield the most extreme differences from observations (underforecast) in a mean sense for low-level lapse rate and depth of the PBL. A hybrid local/nonlocal scheme is found to mitigate these mean difference extremes, while often minimizing conditional bias inherent to strictly local and nonlocal schemes. Advisors/Committee Members: Cavallo, Steven (advisor), Brooks, Harold (advisor), Carr, Frederick (committee member), Kloesel, Kevin (committee member), Greene, Scott (committee member).

Subjects/Keywords: severe thunderstorms; planetary boundary layer; numerical modeling

7 more images…

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APA (6^th Edition):

Cohen, A. (2015). Southeast U.S. Cold Season Severe Thunderstorm Environments and Their Depictions Using Multiple Planetary Boundary Layer Parameterization Schemes. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/23328

Chicago Manual of Style (16^th Edition):

Cohen, Ariel. “Southeast U.S. Cold Season Severe Thunderstorm Environments and Their Depictions Using Multiple Planetary Boundary Layer Parameterization Schemes.” 2015. Doctoral Dissertation, University of Oklahoma. Accessed December 09, 2019. http://hdl.handle.net/11244/23328.

MLA Handbook (7^th Edition):

Cohen, Ariel. “Southeast U.S. Cold Season Severe Thunderstorm Environments and Their Depictions Using Multiple Planetary Boundary Layer Parameterization Schemes.” 2015. Web. 09 Dec 2019.

Vancouver:

Cohen A. Southeast U.S. Cold Season Severe Thunderstorm Environments and Their Depictions Using Multiple Planetary Boundary Layer Parameterization Schemes. [Internet] [Doctoral dissertation]. University of Oklahoma; 2015. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/11244/23328.

Council of Science Editors:

Cohen A. Southeast U.S. Cold Season Severe Thunderstorm Environments and Their Depictions Using Multiple Planetary Boundary Layer Parameterization Schemes. [Doctoral Dissertation]. University of Oklahoma; 2015. Available from: http://hdl.handle.net/11244/23328

University of Oklahoma

23. Illston, Bradley. Near Surface Atmospheric Impacts Resulting From a Developing Metropolitan Area.

Degree: PhD, 2016, University of Oklahoma

URL: http://hdl.handle.net/11244/47037

► Over the past century, the population of the world has become increasingly urbanized. As a result, cities have become larger and more densely populated than… (more)

▼ Over the past century, the population of the world has become increasingly urbanized. As a result, cities have become larger and more densely populated than any time in history. This unprecedented growth and rapid modification of the surface has impacted the overlying boundary-layer of the atmosphere. As such, understanding the overall magnitude and spatial variability of these changes has critical value to the ever growing population living within the impacted regions. The goal of this study is to determine the impact of urbanization on near surface atmospheric conditions and how those impacts evolve with time. The Weather Research & Forecasting (WRF) model was utilized to simulate atmospheric conditions in and around the Oklahoma City area. The WRF output was compared to surface observations from the Oklahoma City Micronet and the Oklahoma Mesonet to quantify model accuracies and biases. The National Land Cover Dataset (NLCD) was subsequently modified to represent land use characteristics from 1890, following the Oklahoma Land Rush, to 2011 at intervals of every 30 years. The WRF model was initialized with modified NLCD land use datasets to determine the impact from a developing metropolitan area. An analysis of the optimal simulation run times demonstrated that the 24-hour run time provided the most accurate results in the variety of scenarios and the urban heat island index was within about 0.5°C of the verification from surface observing stations. The results yielded an increase in urban heat island indices of over 3.5°C throughout the past 120 years with an over 5.0°C magnitude warming of the near surface air temperatures over and around the developed urban areas. The analysis of the 1890 land use background showed that the natural variability of air temperatures without any influences from the metropolitan area are on the order of 1-2°C. Additionally, implementing unique methodologies for interpreting urban heat characteristics demonstrated that by utilizing the top 10, 100, 500, and 1000 warmest model simulation pixels as urban values instead of arbitrary points, a more representative value for urban heat island indices was calculated (resulting in a value of about 3.5°C in the summer in 2011). The use of air temperature histograms (in particular for the minimum temperature) of the model grid point’s output showed changes in the historical distribution of air temperature values indicating a transition towards warmer values over time. Additionally, an analysis of the distribution of air temperature values across the entire domain for each of the historical time periods showed the areal spread of air temperature impacts by over 20%. Advisors/Committee Members: Basara, Jeffrey (advisor), Klein, Petra (committee member), Richman, Michael (committee member), Hu, Xiaoming (committee member), Tarhule, Aondover (committee member).

Subjects/Keywords: Meteorology; Urban Heat Island; Numerical Modeling

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APA (6^th Edition):

Illston, B. (2016). Near Surface Atmospheric Impacts Resulting From a Developing Metropolitan Area. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/47037

Chicago Manual of Style (16^th Edition):

Illston, Bradley. “Near Surface Atmospheric Impacts Resulting From a Developing Metropolitan Area.” 2016. Doctoral Dissertation, University of Oklahoma. Accessed December 09, 2019. http://hdl.handle.net/11244/47037.

MLA Handbook (7^th Edition):

Illston, Bradley. “Near Surface Atmospheric Impacts Resulting From a Developing Metropolitan Area.” 2016. Web. 09 Dec 2019.

Vancouver:

Illston B. Near Surface Atmospheric Impacts Resulting From a Developing Metropolitan Area. [Internet] [Doctoral dissertation]. University of Oklahoma; 2016. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/11244/47037.

Council of Science Editors:

Illston B. Near Surface Atmospheric Impacts Resulting From a Developing Metropolitan Area. [Doctoral Dissertation]. University of Oklahoma; 2016. Available from: http://hdl.handle.net/11244/47037

University of Waterloo

24. Soltani, Madjid. Numerical Modeling of Drug Delivery to Solid Tumor Microvasculature.

Degree: 2013, University of Waterloo

URL: http://hdl.handle.net/10012/7278

► Modeling interstitial fluid flow involves processes such as fluid diffusion, convective transport in the extracellular matrix, and extravasation from blood vessels. In all of these… (more)

▼ Modeling interstitial fluid flow involves processes such as fluid diffusion, convective transport in the extracellular matrix, and extravasation from blood vessels. In all of these processes, computational fluid dynamics can play a crucial role in elucidating the mechanisms of fluid flow in solid tumors and surrounding tissues. To date, microvasculature flow modeling has been most extensively studied with simple tumor shapes and their capillaries at different levels and scales. With our proposed numerical model, however, more complex and realistic tumor shapes and capillary networks can be studied. First, a mathematical model of interstitial fluid flow is developed, based on the application of the governing equations for fluid flow, i.e., the conservation laws for mass and momentum, to physiological systems containing solid tumors. Simulations of interstitial fluid transport in a homogeneous solid tumor demonstrate that, in a uniformly perfused tumor, i.e., one with no necrotic region, the interstitial pressure distribution results in a non-uniform distribution of drug particles. Pressure distribution for different values of necrotic radii is examined, and two new parameters, the critical tumor radius and critical necrotic radius, are defined. In specific ranges of these critical dimensions the interstitial fluid pressure is relatively lower, which in turn leads to a diminished opposing force against drug movement and a subsequently higher drug concentration and potentially enhanced therapeutic effects. In this work, the numerical model of fluid flow in solid tumors is further developed to incorporate and investigate non-spherical tumor shapes such as prolate and oblate ones. Using this enhanced model, tumor shape and size effects on drug delivery to solid tumors are then studied. Based on the assumption that drug particles flow with the interstitial fluid, the pressure and velocity maps of the latter are used to illustrate the drug delivery pattern in a solid tumor. Additionally, the effects of the surface area per unit volume of the tissue, as well as vascular and interstitial hydraulic conductivity on drug delivery efficiency, are investigated. Using a tumor-induced microvasculature architecture instead of a uniform distribution of vessels provides a more realistic model of solid tumors. To this end, continuous and discrete mathematical models of angiogenesis were utilized to observe the effect of matrix density and matrix degrading enzymes on capillary network formation in solid tumors. Additionally, the interactions between matrix-degrading enzymes, the extracellular matrix and endothelial cells are mathematically modeled. Existing continuous and discrete models of angiogenesis were modified to impose the effect of matrix density on the solution. The imposition has been performed by a specific function in movement potential. Implementing realistic boundary and initial conditions showed that, unlike in previous models, the endothelial cells accelerate as they migrate toward the tumor. Now, the…

Subjects/Keywords: Drug delivery; Solid tumor; Numerical modeling; Microvasculature

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APA (6^th Edition):

Soltani, M. (2013). Numerical Modeling of Drug Delivery to Solid Tumor Microvasculature. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7278

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):

Soltani, Madjid. “Numerical Modeling of Drug Delivery to Solid Tumor Microvasculature.” 2013. Thesis, University of Waterloo. Accessed December 09, 2019. http://hdl.handle.net/10012/7278.

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

MLA Handbook (7^th Edition):

Soltani, Madjid. “Numerical Modeling of Drug Delivery to Solid Tumor Microvasculature.” 2013. Web. 09 Dec 2019.

Vancouver:

Soltani M. Numerical Modeling of Drug Delivery to Solid Tumor Microvasculature. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/10012/7278.

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

Council of Science Editors:

Soltani M. Numerical Modeling of Drug Delivery to Solid Tumor Microvasculature. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7278

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

Rochester Institute of Technology

25. Li, Xiang. Computational analysis of ultraviolet reactors.

Degree: Mechanical Engineering, 2009, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/7170

► Disinfection of water treatment using ultraviolet (UV) light has received wide recognition as an important contribution to the protection of public health. To ensure a… (more)

Subjects/Keywords: CFD; Computational analysis; Numerical modeling; Ultraviolet reactors

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APA (6^th Edition):

Li, X. (2009). Computational analysis of ultraviolet reactors. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/7170

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):

Li, Xiang. “Computational analysis of ultraviolet reactors.” 2009. Thesis, Rochester Institute of Technology. Accessed December 09, 2019. https://scholarworks.rit.edu/theses/7170.

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

MLA Handbook (7^th Edition):

Li, Xiang. “Computational analysis of ultraviolet reactors.” 2009. Web. 09 Dec 2019.

Vancouver:

Li X. Computational analysis of ultraviolet reactors. [Internet] [Thesis]. Rochester Institute of Technology; 2009. [cited 2019 Dec 09]. Available from: https://scholarworks.rit.edu/theses/7170.

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

Council of Science Editors:

Li X. Computational analysis of ultraviolet reactors. [Thesis]. Rochester Institute of Technology; 2009. Available from: https://scholarworks.rit.edu/theses/7170

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

Penn State University

26. Siddique, Ridwan. IMPROVING MEDIUM-RANGE STREAMFLOW FORECASTING ACROSS U.S. MIDDLE ATLANTIC REGION.

Degree: 2017, Penn State University

URL: https://etda.libraries.psu.edu/catalog/13998rxs490

► Short- to medium-range (forecast lead times from 0 to 14 days) streamflow forecasts are subject to uncertainties from various sources. A major source of uncertainty… (more)

▼ Short- to medium-range (forecast lead times from 0 to 14 days) streamflow forecasts are subject to uncertainties from various sources. A major source of uncertainty is due to the weather or meteorological forcing. In turn, the uncertainties from the meteorological forcing are propagated into the streamflow forecasts when using the meteorological forecasts (i.e., the outputs from a Numerical Weather Prediction (NWP) model) as forcing to hydrological models. Additionally, the hydrological models themselves are another important source of uncertainty, where uncertainty arises from model structure, parameters, initial and boundary conditions. To advance the science of hydrological modeling and forecasting, these uncertainties need to be quantified and modeled, using novel statistical techniques and robust verification strategies, with the goal of improving the skill and reliability of streamflow forecasts. This, ultimately, may allow generating in advance (i.e., with longer lead times) more informative forecasts, which could eventually translate into better emergency preparedness and response.The main research goal of this dissertation is to develop, implement and verify a new regional hydrological ensemble prediction system (RHEPS), comprised by a numerical weather prediction (NWP) model, different hydrological models and different statistical bias-correction techniques. To implement and verify the new RHEPS, the U.S. middle Atlantic region (MAR) is selected as the study area. This is a region of high socio-economic value with populated cities and, at the same time, vulnerable to floods and other natural disasters. To meet my research goal, the following objectives are carried out: Objective 1 (O1) - To choose a relevant NWP model or system by evaluating and verifying the outputs from different meteorological forecasting systems (i.e., the outputs or forecasts from their underlying NWP models); Objective 2 (O2) - To verify streamflow forecasts generated by forcing a distributed hydrological model with meteorological ensembles, and to develop and evaluate a statistical postprocessor to quantify the uncertainty and adjust biases in the streamflow forecasts; Objective 3 (O3) - To develop, implement and rigorously verify a multimodel approach for short- to medium-range streamflow forecasting. The overarching hypothesis of this dissertation is that the combination and configuration of the different system components in the streamflow forecasting system can have a significant influence on forecast uncertainty and that hydrological multimodeling is able to significantly enhance the quality of streamflow forecasts. The RHEPS is used to test this hypothesis.To meet O1, precipitation ensemble forecasts from two different NWP models are verified. The two NWP models are the National Centers for Environmental Prediction (NCEP) 11-member Global Ensemble Forecast System Reforecast version 2 (GEFSRv2) and the 21-member Short Range Ensemble Forecast (SREF) system. The verification results for O1 reveal the quality of the meteorological… Advisors/Committee Members: Alfonso Mejia, Dissertation Advisor.

Subjects/Keywords: Hydrological modeling; Hydrological forecasting; Numerical weather prediction

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APA (6^th Edition):

Siddique, R. (2017). IMPROVING MEDIUM-RANGE STREAMFLOW FORECASTING ACROSS U.S. MIDDLE ATLANTIC REGION. (Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/13998rxs490

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):

Siddique, Ridwan. “IMPROVING MEDIUM-RANGE STREAMFLOW FORECASTING ACROSS U.S. MIDDLE ATLANTIC REGION.” 2017. Thesis, Penn State University. Accessed December 09, 2019. https://etda.libraries.psu.edu/catalog/13998rxs490.

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

MLA Handbook (7^th Edition):

Siddique, Ridwan. “IMPROVING MEDIUM-RANGE STREAMFLOW FORECASTING ACROSS U.S. MIDDLE ATLANTIC REGION.” 2017. Web. 09 Dec 2019.

Vancouver:

Siddique R. IMPROVING MEDIUM-RANGE STREAMFLOW FORECASTING ACROSS U.S. MIDDLE ATLANTIC REGION. [Internet] [Thesis]. Penn State University; 2017. [cited 2019 Dec 09]. Available from: https://etda.libraries.psu.edu/catalog/13998rxs490.

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

Council of Science Editors:

Siddique R. IMPROVING MEDIUM-RANGE STREAMFLOW FORECASTING ACROSS U.S. MIDDLE ATLANTIC REGION. [Thesis]. Penn State University; 2017. Available from: https://etda.libraries.psu.edu/catalog/13998rxs490

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

University of Toronto

27. Radulj, Djordje. Assessing the Hydraulic Transient Performance of Water and Wastewater Systems Using Field and Numerical Modeling Data.

Degree: 2010, University of Toronto

URL: http://hdl.handle.net/1807/24625

►

A large proportion of water and wastewater systems have traditionally been analyzed and designed without the consideration of the nature, risk, and potential consequence of… (more)

Subjects/Keywords: hydraulic transients; numerical modeling; 0543; 0775

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

APA (6^th Edition):

Radulj, D. (2010). Assessing the Hydraulic Transient Performance of Water and Wastewater Systems Using Field and Numerical Modeling Data. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/24625

Chicago Manual of Style (16^th Edition):

Radulj, Djordje. “Assessing the Hydraulic Transient Performance of Water and Wastewater Systems Using Field and Numerical Modeling Data.” 2010. Masters Thesis, University of Toronto. Accessed December 09, 2019. http://hdl.handle.net/1807/24625.

MLA Handbook (7^th Edition):

Radulj, Djordje. “Assessing the Hydraulic Transient Performance of Water and Wastewater Systems Using Field and Numerical Modeling Data.” 2010. Web. 09 Dec 2019.

Vancouver:

Radulj D. Assessing the Hydraulic Transient Performance of Water and Wastewater Systems Using Field and Numerical Modeling Data. [Internet] [Masters thesis]. University of Toronto; 2010. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/1807/24625.

Council of Science Editors:

Radulj D. Assessing the Hydraulic Transient Performance of Water and Wastewater Systems Using Field and Numerical Modeling Data. [Masters Thesis]. University of Toronto; 2010. Available from: http://hdl.handle.net/1807/24625

Queens University

28. Bryck, Sean. Numerical Modeling of Thermal Enhancement of In Situ Chemical Oxidation (ISCO) and Enhanced In Situ Bioremediation (EISB) .

Degree: Civil Engineering, 2014, Queens University

URL: http://hdl.handle.net/1974/8627

► A numerical model was utilized to assess the effects of elevated temperature on the application of in situ chemical oxidation (ISCO) and enhanced in situ… (more)

Subjects/Keywords: DNAPL; Subsurface Contamination; Groundwater; Numerical Modeling

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APA (6^th Edition):

Bryck, S. (2014). Numerical Modeling of Thermal Enhancement of In Situ Chemical Oxidation (ISCO) and Enhanced In Situ Bioremediation (EISB) . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/8627

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):

Bryck, Sean. “Numerical Modeling of Thermal Enhancement of In Situ Chemical Oxidation (ISCO) and Enhanced In Situ Bioremediation (EISB) .” 2014. Thesis, Queens University. Accessed December 09, 2019. http://hdl.handle.net/1974/8627.

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

MLA Handbook (7^th Edition):

Bryck, Sean. “Numerical Modeling of Thermal Enhancement of In Situ Chemical Oxidation (ISCO) and Enhanced In Situ Bioremediation (EISB) .” 2014. Web. 09 Dec 2019.

Vancouver:

Bryck S. Numerical Modeling of Thermal Enhancement of In Situ Chemical Oxidation (ISCO) and Enhanced In Situ Bioremediation (EISB) . [Internet] [Thesis]. Queens University; 2014. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/1974/8627.

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

Council of Science Editors:

Bryck S. Numerical Modeling of Thermal Enhancement of In Situ Chemical Oxidation (ISCO) and Enhanced In Situ Bioremediation (EISB) . [Thesis]. Queens University; 2014. Available from: http://hdl.handle.net/1974/8627

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

University of Oklahoma

29. Silveira, Allison. Charge Structure and Lightning Patterns in a Simulated Mesoscale Convective System.

Degree: PhD, 2016, University of Oklahoma

URL: http://hdl.handle.net/11244/34071

► Observational analyses of electric field measurements and inferred charge structure within the stratiform region of a mesoscale convective system (MCS) repeatedly reveal quasi-steady, horizontal charge… (more)

▼ Observational analyses of electric field measurements and inferred charge structure within the stratiform region of a mesoscale convective system (MCS) repeatedly reveal quasi-steady, horizontal charge layers at and above the melting level. Previous studies have concluded charge advection can explain the uppermost layers as charged ice particles are ejected from the convective line into the weaker downdrafts of the transition zone. These layers have been observed to slope through and persist beyond the transition zone into the weak, broad mesoscale updrafts of the stratiform region. Likewise, significant electric fields are consistently measured in the layer below -10°C through the melting level, indicative of appreciable charge density, yet are apparently independent of the convective line. The contribution of several possible charge separation processes to the generation and maintenance of charge layers near the melting level are examined in this study. A high-resolution, three-dimensional model with full dynamics and two-moment microphysics was employed. The cloud microphysics were improved to include the prediction of liquid water fractions on graupel and snow to better parameterize the hypothetical charge separation mechanisms. Similar structure to the standard conceptual model of a leading-line, trailing stratiform MCS was exhibited in the model solutions with respect to observed kinematics, microphysics, and charge. In contrast with earlier two-dimensional modeling studies, charge advection did not account for any appreciable charge beyond the transition zone. However, through use of the new mixed-phase particle microphysical scheme, a charging mechanism associated with particle melting was found to be capable of simulating widespread, appreciable charge near the melting level of the stratiform region. Advisors/Committee Members: Straka, Jerry (advisor), Mansell, Edward (advisor), Biggerstaff, Michael (committee member), Leslie, Lance (committee member), Murphy, Sheena (committee member), Ziegler, Conrad (committee member).

Subjects/Keywords: Atmospheric Sciences.; Meteorology; Electrification; Numerical Modeling

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

APA (6^th Edition):

Silveira, A. (2016). Charge Structure and Lightning Patterns in a Simulated Mesoscale Convective System. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/34071

Chicago Manual of Style (16^th Edition):

Silveira, Allison. “Charge Structure and Lightning Patterns in a Simulated Mesoscale Convective System.” 2016. Doctoral Dissertation, University of Oklahoma. Accessed December 09, 2019. http://hdl.handle.net/11244/34071.

MLA Handbook (7^th Edition):

Silveira, Allison. “Charge Structure and Lightning Patterns in a Simulated Mesoscale Convective System.” 2016. Web. 09 Dec 2019.

Vancouver:

Silveira A. Charge Structure and Lightning Patterns in a Simulated Mesoscale Convective System. [Internet] [Doctoral dissertation]. University of Oklahoma; 2016. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/11244/34071.

Council of Science Editors:

Silveira A. Charge Structure and Lightning Patterns in a Simulated Mesoscale Convective System. [Doctoral Dissertation]. University of Oklahoma; 2016. Available from: http://hdl.handle.net/11244/34071

Virginia Tech

30. Wiersma, Codi Allen. The Automation of Numerical Models of Coseismic Tsunamis.

Degree: MS, Geosciences, 2019, Virginia Tech

URL: http://hdl.handle.net/10919/93273

► Short term modeling of tsunamis generated by earthquakes is poorly explored. If an earthquake causes movement in a fault located underwater, and this movement will… (more)

Subjects/Keywords: Numerical Modeling; Tsunami; GeoClaw; Finite Volume

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

APA (6^th Edition):

Wiersma, C. A. (2019). The Automation of Numerical Models of Coseismic Tsunamis. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/93273

Chicago Manual of Style (16^th Edition):

Wiersma, Codi Allen. “The Automation of Numerical Models of Coseismic Tsunamis.” 2019. Masters Thesis, Virginia Tech. Accessed December 09, 2019. http://hdl.handle.net/10919/93273.

MLA Handbook (7^th Edition):

Wiersma, Codi Allen. “The Automation of Numerical Models of Coseismic Tsunamis.” 2019. Web. 09 Dec 2019.

Vancouver:

Wiersma CA. The Automation of Numerical Models of Coseismic Tsunamis. [Internet] [Masters thesis]. Virginia Tech; 2019. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/10919/93273.

Council of Science Editors:

Wiersma CA. The Automation of Numerical Models of Coseismic Tsunamis. [Masters Thesis]. Virginia Tech; 2019. Available from: http://hdl.handle.net/10919/93273

Open Access Theses and Dissertations