subject:(Lattice Boltzmann model)

Universitat Rovira i Virgili

1. Florez Giraldo, Jonathan. Numerical study of bio-fluids and mass transfer processes through membranes.

Degree: Departament d'Enginyeria Mecànica, 2018, Universitat Rovira i Virgili

► Blood rheology (haemorheology) plays a key role in tissue perfusion and its alteration from physiological conditions is often the main cause of cardiovascular pathologies. Therefore,… (more)

▼ Blood rheology (haemorheology) plays a key role in tissue perfusion and its alteration from physiological conditions is often the main cause of cardiovascular pathologies. Therefore, the study of blood velocity profiles and wall shear stress distribution along micro-vessels is important in the field of cardiovascular diseases research. Recent advances in organ-on-a-chip highlighted the possibility of using artificial lung-on-chips which have been developed to replace the respiratory functions of the human lungs in pharmaceutical tests. We have expanded the study of micro-separation processes through micro-porous membranes by developing a numerical tool able to model the behavior of lung-on-a-chip micro-devices in both two and three dimensional geometries. As this is a multiscale problem, the new code consists in a hybrid LBM-FD (Lattice Boltzmann - finite difference) model on a non-uniform material grid, that models mass transfer processes in non-Newtonian flows. A part from the validation of the code, results obtained include the correlations of the non-dimensional numbers involved in mass transfer processes and the dependence on porosity, and the study of concentration profiles under steady (pipe flow) and the beginning of the study in non-steady (Womersley flow) conditions. The LBM-FD hybrid model was used to study the mass transport through a hydrophobic micro-porous membrane located in-between a co-current flow passing through rectangular channels, which is similar to the micro-device used in Lung-On-a-Chip research. This code has been used to perform a parametric study to find the empirical correlation between Peclet number in the permeate channel and the mass transfer processes across the membrane which is quantified by mean of Sherwood number. The correlations in the two-dimensional micro-device reproduce correctly the linear scaling law of <Sh> with the number of pores. The correlations give a power value equal to 1/3 (which characteristic of the Graetz-Leveque problem) for the scaling exponent of the average Sherwood number with Pe. This has been done in 2D and 3D models. In the three-dimensional case, we compared the results obtained using the power-law flow with a shear-thinning degree of n=0.7 against the results obtained using the Newtonian hypothesis (n=1). The non-Newtonian case. Advisors/Committee Members: [email protected] (authoremail), true (authoremailshow), Salueña Pérez, Clara (director), Vernet Peña, Anton (director), Cito, Salvatore (director), true (authorsendemail).

Subjects/Keywords: Mètode de lattice Boltzmann; Flux sanguini; Model híbrid; Método de Lattice Boltzmann; Flujo sanguineo; Modelo híbrido; Lattice Boltzmann method; Blood flow; Hybrid model; Ingeniería y arquitectura; 5; 530.1; 6; 62

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APA (6^th Edition):

Florez Giraldo, J. (2018). Numerical study of bio-fluids and mass transfer processes through membranes. (Thesis). Universitat Rovira i Virgili. Retrieved from http://hdl.handle.net/10803/663300

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):

Florez Giraldo, Jonathan. “Numerical study of bio-fluids and mass transfer processes through membranes.” 2018. Thesis, Universitat Rovira i Virgili. Accessed April 17, 2021. http://hdl.handle.net/10803/663300.

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

MLA Handbook (7^th Edition):

Florez Giraldo, Jonathan. “Numerical study of bio-fluids and mass transfer processes through membranes.” 2018. Web. 17 Apr 2021.

Vancouver:

Florez Giraldo J. Numerical study of bio-fluids and mass transfer processes through membranes. [Internet] [Thesis]. Universitat Rovira i Virgili; 2018. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10803/663300.

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

Council of Science Editors:

Florez Giraldo J. Numerical study of bio-fluids and mass transfer processes through membranes. [Thesis]. Universitat Rovira i Virgili; 2018. Available from: http://hdl.handle.net/10803/663300

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

NSYSU

2. Yu, Tsung-hsien. A hybrid LB-DPM method to predict collection efficiency of woven screens for microparticles and nanoparticles.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2018, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705118-232810

► The present study uses a 2D hybrid lattice Boltzmann-discrete phase model method to predict screen collection efficiency in woven wire screen. The computational results are… (more)

Subjects/Keywords: screen collection efficiency; microparticle; lattice Boltzmann-discrete phase model; woven wire screen; nanoparticle

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APA (6^th Edition):

Yu, T. (2018). A hybrid LB-DPM method to predict collection efficiency of woven screens for microparticles and nanoparticles. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705118-232810

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):

Yu, Tsung-hsien. “A hybrid LB-DPM method to predict collection efficiency of woven screens for microparticles and nanoparticles.” 2018. Thesis, NSYSU. Accessed April 17, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705118-232810.

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

MLA Handbook (7^th Edition):

Yu, Tsung-hsien. “A hybrid LB-DPM method to predict collection efficiency of woven screens for microparticles and nanoparticles.” 2018. Web. 17 Apr 2021.

Vancouver:

Yu T. A hybrid LB-DPM method to predict collection efficiency of woven screens for microparticles and nanoparticles. [Internet] [Thesis]. NSYSU; 2018. [cited 2021 Apr 17]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705118-232810.

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

Council of Science Editors:

Yu T. A hybrid LB-DPM method to predict collection efficiency of woven screens for microparticles and nanoparticles. [Thesis]. NSYSU; 2018. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705118-232810

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

Wayne State University

3. Hasan, Wessam Falih. Surfactants, Thermal And Surface Energy Effects On Emulsions’ Transport Properties: A Study Using Lattice Boltzmann Method.

Degree: PhD, Mechanical Engineering, 2018, Wayne State University

URL: https://digitalcommons.wayne.edu/oa_dissertations/2028

► This work aims to provide an efficient Gunstensen LBM based CFD model, capable of solving complex problems related to droplets behavior in shear and… (more)

▼ This work aims to provide an efficient Gunstensen LBM based CFD model, capable of solving complex problems related to droplets behavior in shear and parabolic flows. Thermal conditions determine the outcome of the physical and transport properties of emulsions during their various processing phases. A better understanding of the intricate relationship between thermal, surfactants and hydrodynamics can help in the optimization of these processes during the production of emulsions. To investigate the outcome of coupling thermal, surfactants and hydrodynamics on emulsions behavior, a robust quasi-steady thermal-surfactants numerical scheme is presented and used here. To validate the model, the rheological behavior of oil-in-water system was investigated. The numerical results matched well the experimental results of the similar oil-in-water system under steady-state thermal conditions. Furthermore, it is shown that the proposed numerical model can handle cases with transient thermal conditions while maintaining good accuracy. The model has been improved to study the combined effects of temperature, and contact angle on the movement of slugs and droplets of oil in water (O/W) system flowing between two parallel plates and in 3D confined flow study. This is found in the enhanced oil recovery technique which includes thermal, contact angle and surfactant effects for breaking up trapped crude oil. The model static contact angle due to the deposition of the O/W droplet on a flat surface with simulated hydrophilic characteristic at different fluid temperatures, matched very well the proposed theoretical calculation. Furthermore, the model was used to simulate the dynamic behavior of droplets and slugs deposited on the domain's upper and lower surfaces, while subjected to parabolic flow conditions. The model accurately simulated the contact angle hysteresis for the dynamic droplets cases. It was also shown that at elevated temperatures the required power to transport the mixture diminished remarkably. The aim is to improve our understanding of the underlying physics associated with the secondary and tertiary extraction process of trapped crude oil in wells by injecting hot water. Finally, the model was utilized for the investigation of the flow behavior of O/W emulsions with the goal of delineating the best practices for transporting these emulsions in circular ducts. The effects of temperature, volume fraction, flow pressure gradient, and surfactants concentration are investigated in a Poiseuille flow setup. A dimensionless power number ratio was introduced and successfully used for guiding the selection of the most cost-efficient means for transporting O/W emulsion. Advisors/Committee Members: Naeim Henein, Hassan Farhat.

Subjects/Keywords: Gunstensen model; Hybrid lattice Boltzmann method; Power number; Rheology; Surfactants-covered droplet; Thermal; Mechanical Engineering

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APA (6^th Edition):

Hasan, W. F. (2018). Surfactants, Thermal And Surface Energy Effects On Emulsions’ Transport Properties: A Study Using Lattice Boltzmann Method. (Doctoral Dissertation). Wayne State University. Retrieved from https://digitalcommons.wayne.edu/oa_dissertations/2028

Chicago Manual of Style (16^th Edition):

Hasan, Wessam Falih. “Surfactants, Thermal And Surface Energy Effects On Emulsions’ Transport Properties: A Study Using Lattice Boltzmann Method.” 2018. Doctoral Dissertation, Wayne State University. Accessed April 17, 2021. https://digitalcommons.wayne.edu/oa_dissertations/2028.

MLA Handbook (7^th Edition):

Hasan, Wessam Falih. “Surfactants, Thermal And Surface Energy Effects On Emulsions’ Transport Properties: A Study Using Lattice Boltzmann Method.” 2018. Web. 17 Apr 2021.

Vancouver:

Hasan WF. Surfactants, Thermal And Surface Energy Effects On Emulsions’ Transport Properties: A Study Using Lattice Boltzmann Method. [Internet] [Doctoral dissertation]. Wayne State University; 2018. [cited 2021 Apr 17]. Available from: https://digitalcommons.wayne.edu/oa_dissertations/2028.

Council of Science Editors:

Hasan WF. Surfactants, Thermal And Surface Energy Effects On Emulsions’ Transport Properties: A Study Using Lattice Boltzmann Method. [Doctoral Dissertation]. Wayne State University; 2018. Available from: https://digitalcommons.wayne.edu/oa_dissertations/2028

Queensland University of Technology

4. Gaw, Richelle Leanne. The effect of red blood cell orientation on the electrical impedance of pulsatile blood with implications for impedance cardiography.

Degree: 2010, Queensland University of Technology

URL: https://eprints.qut.edu.au/39448/

► Impedance cardiography is an application of bioimpedance analysis primarily used in a research setting to determine cardiac output. It is a non invasive technique that… (more)

▼ Impedance cardiography is an application of bioimpedance analysis primarily used in a research setting to determine cardiac output. It is a non invasive technique that measures the change in the impedance of the thorax which is attributed to the ejection of a volume of blood from the heart. The cardiac output is calculated from the measured impedance using the parallel conductor theory and a constant value for the resistivity of blood. However, the resistivity of blood has been shown to be velocity dependent due to changes in the orientation of red blood cells induced by changing shear forces during flow. The overall goal of this thesis was to study the effect that flow deviations have on the electrical impedance of blood, both experimentally and theoretically, and to apply the results to a clinical setting. The resistivity of stationary blood is isotropic as the red blood cells are randomly orientated due to Brownian motion. In the case of blood flowing through rigid tubes, the resistivity is anisotropic due to the biconcave discoidal shape and orientation of the cells. The generation of shear forces across the width of the tube during flow causes the cells to align with the minimal cross sectional area facing the direction of flow. This is in order to minimise the shear stress experienced by the cells. This in turn results in a larger cross sectional area of plasma and a reduction in the resistivity of the blood as the flow increases. Understanding the contribution of this effect on the thoracic impedance change is a vital step in achieving clinical acceptance of impedance cardiography. Published literature investigates the resistivity variations for constant blood flow. In this case, the shear forces are constant and the impedance remains constant during flow at a magnitude which is less than that for stationary blood. The research presented in this thesis, however, investigates the variations in resistivity of blood during pulsataile flow through rigid tubes and the relationship between impedance, velocity and acceleration. Using rigid tubes isolates the impedance change to variations associated with changes in cell orientation only. The implications of red blood cell orientation changes for clinical impedance cardiography were also explored. This was achieved through measurement and analysis of the experimental impedance of pulsatile blood flowing through rigid tubes in a mock circulatory system. A novel theoretical model including cell orientation dynamics was developed for the impedance of pulsatile blood through rigid tubes. The impedance of flowing blood was theoretically calculated using analytical methods for flow through straight tubes and the numerical Lattice Boltzmann method for flow through complex geometries such as aortic valve stenosis. The result of the analytical theoretical model was compared to the experimental impedance measurements through rigid tubes. The impedance calculated for flow through a stenosis using the Lattice Boltzmann method provides results for comparison with impedance…

Subjects/Keywords: bioimpedance; impedance cardiography; red blood cells; erythrocytes; cell orientation; impedance; blood flow; mock circulatory system; analytical model; lattice boltzmann

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APA (6^th Edition):

Gaw, R. L. (2010). The effect of red blood cell orientation on the electrical impedance of pulsatile blood with implications for impedance cardiography. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/39448/

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):

Gaw, Richelle Leanne. “The effect of red blood cell orientation on the electrical impedance of pulsatile blood with implications for impedance cardiography.” 2010. Thesis, Queensland University of Technology. Accessed April 17, 2021. https://eprints.qut.edu.au/39448/.

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

MLA Handbook (7^th Edition):

Gaw, Richelle Leanne. “The effect of red blood cell orientation on the electrical impedance of pulsatile blood with implications for impedance cardiography.” 2010. Web. 17 Apr 2021.

Vancouver:

Gaw RL. The effect of red blood cell orientation on the electrical impedance of pulsatile blood with implications for impedance cardiography. [Internet] [Thesis]. Queensland University of Technology; 2010. [cited 2021 Apr 17]. Available from: https://eprints.qut.edu.au/39448/.

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

Council of Science Editors:

Gaw RL. The effect of red blood cell orientation on the electrical impedance of pulsatile blood with implications for impedance cardiography. [Thesis]. Queensland University of Technology; 2010. Available from: https://eprints.qut.edu.au/39448/

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

University of Bradford

5. Clark, Peter Graham. Multi-scale modelling describing thermal behaviour of polymeric materials : scalable lattice-Boltzmann models based upon the theory of Grmela towards refined thermal performance prediction of polymeric materials at micro and nano scales.

Degree: PhD, 2012, University of Bradford

URL: http://hdl.handle.net/10454/5768

► Micrometer injection moulding is a type of moulding in which moulds have geometrical design features on a micrometer scale that must be transferred to the… (more)

Subjects/Keywords: 620.1; Lattice-Boltzmann; Polymer; Mathematical model; Numerical simulation; Extrusion; Thermal; Micro; Nano; Micrometer injection moulding; Polymer heat transfer

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APA (6^th Edition):

Clark, P. G. (2012). Multi-scale modelling describing thermal behaviour of polymeric materials : scalable lattice-Boltzmann models based upon the theory of Grmela towards refined thermal performance prediction of polymeric materials at micro and nano scales. (Doctoral Dissertation). University of Bradford. Retrieved from http://hdl.handle.net/10454/5768

Chicago Manual of Style (16^th Edition):

Clark, Peter Graham. “Multi-scale modelling describing thermal behaviour of polymeric materials : scalable lattice-Boltzmann models based upon the theory of Grmela towards refined thermal performance prediction of polymeric materials at micro and nano scales.” 2012. Doctoral Dissertation, University of Bradford. Accessed April 17, 2021. http://hdl.handle.net/10454/5768.

MLA Handbook (7^th Edition):

Clark, Peter Graham. “Multi-scale modelling describing thermal behaviour of polymeric materials : scalable lattice-Boltzmann models based upon the theory of Grmela towards refined thermal performance prediction of polymeric materials at micro and nano scales.” 2012. Web. 17 Apr 2021.

Vancouver:

Clark PG. Multi-scale modelling describing thermal behaviour of polymeric materials : scalable lattice-Boltzmann models based upon the theory of Grmela towards refined thermal performance prediction of polymeric materials at micro and nano scales. [Internet] [Doctoral dissertation]. University of Bradford; 2012. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10454/5768.

Council of Science Editors:

Clark PG. Multi-scale modelling describing thermal behaviour of polymeric materials : scalable lattice-Boltzmann models based upon the theory of Grmela towards refined thermal performance prediction of polymeric materials at micro and nano scales. [Doctoral Dissertation]. University of Bradford; 2012. Available from: http://hdl.handle.net/10454/5768

ETH Zürich

6. Jäger, Robin. Erosion and Deposition in Porous Media.

Degree: 2018, ETH Zürich

URL: http://hdl.handle.net/20.500.11850/275695

► Suspension flow through porous media featuring deposition and erosion is a process that occurs in many areas and at different scales. Prominent examples include filtering… (more)

Subjects/Keywords: Fluid dynamics; Lattice Boltzmann model; Suspension; Porous media; info:eu-repo/classification/ddc/560; info:eu-repo/classification/ddc/530; Paleontology, paleozoology; Physics

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APA (6^th Edition):

Jäger, R. (2018). Erosion and Deposition in Porous Media. (Doctoral Dissertation). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/275695

Chicago Manual of Style (16^th Edition):

Jäger, Robin. “Erosion and Deposition in Porous Media.” 2018. Doctoral Dissertation, ETH Zürich. Accessed April 17, 2021. http://hdl.handle.net/20.500.11850/275695.

MLA Handbook (7^th Edition):

Jäger, Robin. “Erosion and Deposition in Porous Media.” 2018. Web. 17 Apr 2021.

Vancouver:

Jäger R. Erosion and Deposition in Porous Media. [Internet] [Doctoral dissertation]. ETH Zürich; 2018. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/20.500.11850/275695.

Council of Science Editors:

Jäger R. Erosion and Deposition in Porous Media. [Doctoral Dissertation]. ETH Zürich; 2018. Available from: http://hdl.handle.net/20.500.11850/275695

ETH Zürich

7. Qin, Feifei. Hybrid Lattice Boltzmann Modeling of Drying of Colloidal Suspensions in Micro-porous Structures.

Degree: 2020, ETH Zürich

URL: http://hdl.handle.net/20.500.11850/404677

► Drying of colloidal suspensions and their nanoparticle deposition in porous structures are ubiquitous phenomena in nature and daily life. Due to the complex co-occurrence of… (more)

▼ Drying of colloidal suspensions and their nanoparticle deposition in porous structures are ubiquitous phenomena in nature and daily life. Due to the complex co-occurrence of multi-physical processes, such as two-phase fluid flow, phase change, heat and mass transport within the porous structure, an accurate modeling of this phenomenon with a large amount of particles is not yet feasible. Despite the conducted experimental studies, without a powerful numerical model, the underlying mechanisms of colloidal liquid drying, nanoparticle transport and deposition cannot yet be fully revealed. In this thesis, an advanced tricoupled hybrid lattice Boltzmann method (LBM) is established to accurately model the drying of colloidal suspension and nanoparticle deposition, under various conditions. With the developed model, the patterns and rates of liquid drying in two different micro-porous structures are first investigated. Afterwards, drying of colloidal suspension in micro-porous structures and nanoparticle deposition is studied, focusing on the influence of initial nanoparticle concentration, porosity of the structure. Finally, combined with auxiliary experiments and more importantly, with revealing the mechanisms at play, the developed tricoupled hybrid LBM is employed to study colloidal nanoparticle deposition in two applications, i.e. control of nanoparticle deposition configuration and heat conduction enhancement in three-dimensional (3D) chip stacks. An entropic multiple-relaxation-time (EMRT-MP) LBM is developed for the simulation of isothermal two-phase flow. By coupling it with an extended temperature equation (ETE) that considers heat conduction/convection and latent heat due to evaporation, the second model named T-EMRT-MP LBM, is developed to simulate quasi-isothermal/non-isothermal liquid drying. By further coupling T-EMRT-MP LBM to a modified convection diffusion equation (MCDE) for nanoparticle transport and deposition, a tricoupled model is developed for drying of colloidal suspension and nanoparticle deposition. The tricoupled model is hybrid with the two-phase flow modeled by LBM while the ETE and MCDE solved by finite difference method. The developed tricoupled hybrid model is capable of accurately simulating the drying of colloidal suspension under different nanoparticle concentrations, drying temperatures, liquid properties such as viscosity, thermal conductivity, surface tension, etc., geometries and surface wettability of porous structures. Combined with experimental study, the T-EMRT-MP LBM is applied to investigate liquid drying in two different micro-porous architectures with a heating source. Both simulations and experiments show the rectangular-spiral and gradient-shaped liquid drying patterns as designed, which are explained by capillary pumping. Further, given the intended presence of capillary pumping during the entire drying process, drying rates remain relatively constant. Moreover, the drying pattern is numerically found to change from rectangular-spiral to continuous when the drying… Advisors/Committee Members: Carmeliet, Jan, Poulikakos, Dimos, Kang, Qinjun, Brunschwiler, Thomas.

Subjects/Keywords: Hybrid lattice Boltzmann model; Two-phase flow; Drying; Heat and mass transport; info:eu-repo/classification/ddc/620; Engineering & allied operations

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

APA (6^th Edition):

Qin, F. (2020). Hybrid Lattice Boltzmann Modeling of Drying of Colloidal Suspensions in Micro-porous Structures. (Doctoral Dissertation). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/404677

Chicago Manual of Style (16^th Edition):

Qin, Feifei. “Hybrid Lattice Boltzmann Modeling of Drying of Colloidal Suspensions in Micro-porous Structures.” 2020. Doctoral Dissertation, ETH Zürich. Accessed April 17, 2021. http://hdl.handle.net/20.500.11850/404677.

MLA Handbook (7^th Edition):

Qin, Feifei. “Hybrid Lattice Boltzmann Modeling of Drying of Colloidal Suspensions in Micro-porous Structures.” 2020. Web. 17 Apr 2021.

Vancouver:

Qin F. Hybrid Lattice Boltzmann Modeling of Drying of Colloidal Suspensions in Micro-porous Structures. [Internet] [Doctoral dissertation]. ETH Zürich; 2020. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/20.500.11850/404677.

Council of Science Editors:

Qin F. Hybrid Lattice Boltzmann Modeling of Drying of Colloidal Suspensions in Micro-porous Structures. [Doctoral Dissertation]. ETH Zürich; 2020. Available from: http://hdl.handle.net/20.500.11850/404677

University of Arizona

8. Mishra, Sudib Kumar. DEVELOPMENT OF A MULTISCALE AND MULTIPHYSICS SIMULATION FRAMEWORK FOR REACTION-DIFFUSION-CONVECTION PROBLEMS .

Degree: 2009, University of Arizona

URL: http://hdl.handle.net/10150/194088

► Reaction-diffusion-convection (R-D-C) problems are governed by wide spectrum of spatio-temporal scales associated with ranges of physical and chemical processes. Such Problems are called multiscale, multiphysics… (more)

▼ Reaction-diffusion-convection (R-D-C) problems are governed by wide spectrum of spatio-temporal scales associated with ranges of physical and chemical processes. Such Problems are called multiscale, multiphysics problems. The challenge associated with R-D-C problems is to bridge these scales and processes as seamlessly as possible. For this purpose, we develop a wavelet-based multiscale simulation framework that couples diverse scales and physics.In a first stage we focus on R-D models. We treat the `fine' reaction-scales stochastically, with kinetic Monte Carlo (kMC). The transport via diffusion possesses larger spatio-temporal scales which are bridged to the kMC with the Compound Wavelet Matrix (CWM) formalism. Since R-D-C problems are dynamical we extend the CWM method via the dynamic-coupling of the kMC and diffusion models. The process is approximated by sequential increments, where the CWM on each increment is used as the starting point for the next, providing better exploration of phase-space. The CWM is extended to two-dimensional diffusion with a reactive line-boundary to show that the computational gain and error depends on the scale-overlap and wavelet-filtering. We improve the homogenization by a wavelet-based scheme for the exchange of information between a reactive and diffusive field by passing information along fine to coarse (up-scaling) and coarse to fine (down-scaling) scales by retaining the fine-scale statistics (higher-order moments, correlations). Critical to the success of the scheme is the identification of dominant scales. The efficiency of the scheme is compared to the homogenization and benchmark model with scale-disparity.To incorporate transport by convection, we then couple the Lattice Boltzmann Model (LBM) and kMC operating at diverse scales for flows around reactive block. Such model explores markedly different physics due to strong interplay between these time-scales. `Small' reaction induced temperature variations are considered for multiscale coupling of the reactions with the flow, showing the discrepancies in the evolutions and yield comparing to the conventional model. The same framework is used to study the reactions induced by hydrodynamic bubble collapse which shows the similar features of the kinetics and yield comparing to conventional models.We culminate to some problems that could be solved using the developed framework and preliminary results are presented as "proof of concept." Advisors/Committee Members: Frantziskonis, George N (advisor), Deymier, Pierre A (advisor), Kundu, Tribikram (committeemember), Haldar, Achintya (committeemember).

Subjects/Keywords: Convection; Diffusion; Lattice Boltzmann Model; Multiscaling; Reaction; Wavelets

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APA (6^th Edition):

Mishra, S. K. (2009). DEVELOPMENT OF A MULTISCALE AND MULTIPHYSICS SIMULATION FRAMEWORK FOR REACTION-DIFFUSION-CONVECTION PROBLEMS . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/194088

Chicago Manual of Style (16^th Edition):

Mishra, Sudib Kumar. “DEVELOPMENT OF A MULTISCALE AND MULTIPHYSICS SIMULATION FRAMEWORK FOR REACTION-DIFFUSION-CONVECTION PROBLEMS .” 2009. Doctoral Dissertation, University of Arizona. Accessed April 17, 2021. http://hdl.handle.net/10150/194088.

MLA Handbook (7^th Edition):

Mishra, Sudib Kumar. “DEVELOPMENT OF A MULTISCALE AND MULTIPHYSICS SIMULATION FRAMEWORK FOR REACTION-DIFFUSION-CONVECTION PROBLEMS .” 2009. Web. 17 Apr 2021.

Vancouver:

Mishra SK. DEVELOPMENT OF A MULTISCALE AND MULTIPHYSICS SIMULATION FRAMEWORK FOR REACTION-DIFFUSION-CONVECTION PROBLEMS . [Internet] [Doctoral dissertation]. University of Arizona; 2009. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10150/194088.

Council of Science Editors:

Mishra SK. DEVELOPMENT OF A MULTISCALE AND MULTIPHYSICS SIMULATION FRAMEWORK FOR REACTION-DIFFUSION-CONVECTION PROBLEMS . [Doctoral Dissertation]. University of Arizona; 2009. Available from: http://hdl.handle.net/10150/194088

University of Melbourne

9. Yap, Ying Wan. Numerical solutions of the Boltzmann-BGK equation for oscillatory gas flows.

Degree: 2014, University of Melbourne

URL: http://hdl.handle.net/11343/43242

► Recent developments in nano- and micro- technology have led to fabrication of mechanical devices that resonate at ultra-high frequency (100 MHz – 100 GHz), with… (more)

Subjects/Keywords: Boltzmann equation; BGK kinetic model; rarefied gas dynamics; dilute gas; fluid mechanics; lattice Boltzmann; matched asymptotic; Couette flow; flow around a sphere

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

APA (6^th Edition):

Yap, Y. W. (2014). Numerical solutions of the Boltzmann-BGK equation for oscillatory gas flows. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/43242

Chicago Manual of Style (16^th Edition):

Yap, Ying Wan. “Numerical solutions of the Boltzmann-BGK equation for oscillatory gas flows.” 2014. Doctoral Dissertation, University of Melbourne. Accessed April 17, 2021. http://hdl.handle.net/11343/43242.

MLA Handbook (7^th Edition):

Yap, Ying Wan. “Numerical solutions of the Boltzmann-BGK equation for oscillatory gas flows.” 2014. Web. 17 Apr 2021.

Vancouver:

Yap YW. Numerical solutions of the Boltzmann-BGK equation for oscillatory gas flows. [Internet] [Doctoral dissertation]. University of Melbourne; 2014. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/11343/43242.

Council of Science Editors:

Yap YW. Numerical solutions of the Boltzmann-BGK equation for oscillatory gas flows. [Doctoral Dissertation]. University of Melbourne; 2014. Available from: http://hdl.handle.net/11343/43242

10. Augusto, Liliana de Luca Xavier. Aplicação do método de lattice Boltzmann na simulação de meios filtrantes : implementação de códigos para geração do domínio de cálculo e condição de contorno de escorregamento.

Degree: 2018, Universidade Federal de São Carlos; Câmpus São Carlos; Programa de Pós-Graduação em Engenharia Química – PPGEQ; UFSCar

URL: https://repositorio.ufscar.br/handle/ufscar/9741

►

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Many studies have been carried out to find the best operating point for filter media, and the… (more)

▼

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Many studies have been carried out to find the best operating point for filter media, and the mathematical modeling and simulation are becoming a important tool. In this work, a code was built to generate geometric models for filter media from data obtained by statistical analysis and microscopic images, to be used in simulations. Two different approaches (random and uniform distributions) were used to alocate the fiber inside the limits of the filter medium. The OpenLB library, which uses the mesoscopic approach lattice Boltzmann method based on kinetic of gases, was used to calculate the gas flow and estimate the pressure drop through the filter medium. A free slip boundary condition was implemented in OpenLB code, using the mesoscopic approach of specular reflection of the distribution functions. This boundary condition was then applied on the fibers surfaces, with the purpose of correctly represent the slip flow regime. The free slip boundary condition was verificated by simulating flows in confined duct and around obstacles, and the results were compared with data obtained by macroscopic simulations carried out on the commercial package ANSYS Fluent, which solves Navier-Stokes equations, and also with data found in literature. In filter media simulations, the free slip and no-slip boundary conditions were applied on the fibers surfaces and the numerical results of three types of filter media were then compared to experimental data. A better agreement between numerical and experimental data was observed if the free slip boundary condition was used. This confirms the need to consider the proper boundary condition in flows with high Knudsen number. Moreover, an analysis of the influence of the size of the computational domain on the pressure drop was also carried out, in order to determine the smaller size of the geometric model of the filter medium. According to the results, the pressure drop tends to become stable with the increasing of the domain, since the solid fraction is more accurate. This stabilization occurs with better agreement when the ramdon alocation of the fibers are used to distribute the fibers inside the filter medium.

Diversos estudos vêm sendo realizados com o intuito de encontrar o melhor ponto de operação para os meios filtrantes, nos quais a modelagem e simulação vêm se tornando grandes aliadas. Neste trabalho, foi desenvolvido um código para a construção de modelos geométricos de meios filtrantes para serem, posteriormente, utilizados em simulações numéricas, a partir de dados obtidos por análises estatísticas e de imagens de microscopia. Duas abordagens (distribuições aleatória e uniforme) foram utilizadas para a alocação das fibras no interior das fronteiras do meio filtrante. A biblioteca OpenLB, que utiliza o método mesoscópico de lattice Boltzmann, baseado na teoria cinética dos gases, foi utilizada para o cálculo do escoamento do gás e estimativa da queda de pressão através do meio filtrante. A condição de…

Advisors/Committee Members: Lopes, Gabriela Cantarelli, Gonçalves, José Antônio Silveira.

Subjects/Keywords: Método de lattice Boltzmann; Condição de contorno de escorregamento; Modelos geométricos de meios filtrantes; Lattice Boltzmann method; Free slip boundary condition; Geometric model for filter media; ENGENHARIAS::ENGENHARIA QUIMICA::PROCESSOS INDUSTRIAIS DE ENGENHARIA QUIMICA

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

APA (6^th Edition):

Augusto, L. d. L. X. (2018). Aplicação do método de lattice Boltzmann na simulação de meios filtrantes : implementação de códigos para geração do domínio de cálculo e condição de contorno de escorregamento. (Doctoral Dissertation). Universidade Federal de São Carlos; Câmpus São Carlos; Programa de Pós-Graduação em Engenharia Química – PPGEQ; UFSCar. Retrieved from https://repositorio.ufscar.br/handle/ufscar/9741

Chicago Manual of Style (16^th Edition):

Augusto, Liliana de Luca Xavier. “Aplicação do método de lattice Boltzmann na simulação de meios filtrantes : implementação de códigos para geração do domínio de cálculo e condição de contorno de escorregamento.” 2018. Doctoral Dissertation, Universidade Federal de São Carlos; Câmpus São Carlos; Programa de Pós-Graduação em Engenharia Química – PPGEQ; UFSCar. Accessed April 17, 2021. https://repositorio.ufscar.br/handle/ufscar/9741.

MLA Handbook (7^th Edition):

Augusto, Liliana de Luca Xavier. “Aplicação do método de lattice Boltzmann na simulação de meios filtrantes : implementação de códigos para geração do domínio de cálculo e condição de contorno de escorregamento.” 2018. Web. 17 Apr 2021.

Vancouver:

Augusto LdLX. Aplicação do método de lattice Boltzmann na simulação de meios filtrantes : implementação de códigos para geração do domínio de cálculo e condição de contorno de escorregamento. [Internet] [Doctoral dissertation]. Universidade Federal de São Carlos; Câmpus São Carlos; Programa de Pós-Graduação em Engenharia Química – PPGEQ; UFSCar; 2018. [cited 2021 Apr 17]. Available from: https://repositorio.ufscar.br/handle/ufscar/9741.

Council of Science Editors:

Augusto LdLX. Aplicação do método de lattice Boltzmann na simulação de meios filtrantes : implementação de códigos para geração do domínio de cálculo e condição de contorno de escorregamento. [Doctoral Dissertation]. Universidade Federal de São Carlos; Câmpus São Carlos; Programa de Pós-Graduação em Engenharia Química – PPGEQ; UFSCar; 2018. Available from: https://repositorio.ufscar.br/handle/ufscar/9741

Universitat Rovira i Virgili

11. Puig Arànega, Albert. Review of Boundary Conditions and Investigation Towards the Development of a Growth Model: a Lattice Boltzmann Method Approach.

Degree: Departament d'Enginyeria Mecànica, 2016, Universitat Rovira i Virgili

URL: http://hdl.handle.net/10803/396303

► The lattice Boltzmann method (LBM) is a computational fluid dynamics technique that is rapidly earning popularity due to its inherent properties: it deals with complex… (more)

▼ The lattice Boltzmann method (LBM) is a computational fluid dynamics technique that is rapidly earning popularity due to its inherent properties: it deals with complex geometries with relative ease, it is computationally easy to implement and it can be effectively used with massive parallel computing tools. However, the method is still not entirely established in the scientific community due to its relatively early appearance. One known topic that is still under active research are the study and development of effective boundary conditions, specially non-reflecting ones. We can find on the literature several proposals of non-reflective boundary conditions for LBM. However, there is not much conducted research about the physical impact of using a reflective or a non-reflective approach on a simulation beyond the boundary tests. On the other hand, the LBM is also capable to able to hold the advection-diffusion transport equation by means of a passive scalar. One very active topic is the study of the blood platelet transport. Platelets are the cornerstone of the coagulation and this latter phenomenon can occlude an artery when platelets are activated in an atherosclerotic artery, which is called thrombosis. Platelets also experiment a spontaneous migration, called margination, to the walls that naturally enhance their performance. The thesis report consists on two distinct parts. Firstly, we present the results of a parametric study to analyze the physical impact of the spurious reflections that occur on a flow past a square obstacle in a confined channel. Secondly, we develop a transport model for platelets in the LBM based on the double distribution technique and we reproduce the margination of platelets and we prepare a set of tools to develop a growth model to resemble a thrombosis event in a coronary artery. Advisors/Committee Members: [email protected] (authoremail), true (authoremailshow), Cuesta Romeo, Ildefonso (director), Salueña Pérez, Clara (codirector), Cito, Salvatore (codirector), true (authorsendemail).

Subjects/Keywords: Mètode Lattice Boltzmann; Condicions de frontera; Model de creixement; Condiciones de frontera; Modelo de crecimiento; Boundary conditions; Growth model; Enginyeria i Arquitectura; 6; 616.1; 62

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APA (6^th Edition):

Puig Arànega, A. (2016). Review of Boundary Conditions and Investigation Towards the Development of a Growth Model: a Lattice Boltzmann Method Approach. (Thesis). Universitat Rovira i Virgili. Retrieved from http://hdl.handle.net/10803/396303

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):

Puig Arànega, Albert. “Review of Boundary Conditions and Investigation Towards the Development of a Growth Model: a Lattice Boltzmann Method Approach.” 2016. Thesis, Universitat Rovira i Virgili. Accessed April 17, 2021. http://hdl.handle.net/10803/396303.

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

MLA Handbook (7^th Edition):

Puig Arànega, Albert. “Review of Boundary Conditions and Investigation Towards the Development of a Growth Model: a Lattice Boltzmann Method Approach.” 2016. Web. 17 Apr 2021.

Vancouver:

Puig Arànega A. Review of Boundary Conditions and Investigation Towards the Development of a Growth Model: a Lattice Boltzmann Method Approach. [Internet] [Thesis]. Universitat Rovira i Virgili; 2016. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10803/396303.

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

Council of Science Editors:

Puig Arànega A. Review of Boundary Conditions and Investigation Towards the Development of a Growth Model: a Lattice Boltzmann Method Approach. [Thesis]. Universitat Rovira i Virgili; 2016. Available from: http://hdl.handle.net/10803/396303

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

Indian Institute of Science

12. Jaju, S J. Multi-scale Modelling of Lamellar Mesophases.

Degree: PhD, Faculty of Engineering, 2018, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/3621

► Surfactants are amphiphilic molecules which self-assemble at the interface in oil-water-surfactant mixtures such that the hydrophobic part, called tail, stays in oil and the remaining… (more)

▼ Surfactants are amphiphilic molecules which self-assemble at the interface in oil-water-surfactant mixtures such that the hydrophobic part, called tail, stays in oil and the remaining part, called head, resides in hydrophilic en-vironment. Depending upon concentration of individual components, these mixtures form several microphases, such as bilayers, micelles, columnar and lamellar phases. A lamellar phase, at equilibrium, is made up of alternat-ing layers of water and oil separated by surfactants, or of alternate layers of water and surfactant bilayers such that the hydrophilic heads are in contact with water. This equilibrium state is rarely achieved in macroscopic samples due to thermodynamic and kinetic constraints; instead, a lamellar fluid is usually disordered with a large number of defects. These defects have significant effect on the flow behaviour of the lamellar mesophase systems. They are known to alter the flow field, resulting stresses and in turn could get distorted or annihilated by the flow. In present work, we analyse this two way coupling between lamellar structure and flow field. The structural and rheological evolution of an initially disordered lamellar phase system under a shear flow is examined using a mesoscale model based on a free energy functional for the concentration field, which is the scaled difference in the concentration between the hydrophilic and hydrophobic components. Two distinct modes of structural evolution are observed depending only on Peclet number, which ratio of inertial forces to mass diffusivity, in-dependent of system size. At low Peclet number, local domains are formed which are then rotated and stretched by shear. A balance between defect creation and annihilation is reached due to which the system never reaches the equilibrium layer configuration. In the opposite limit, partially formed layers break and reform so as to form a nearly aligned lamellar phase con-figuration with residual defects. Viscosity of lamellar phase system increases with layer moduli, differences in viscosity of individual components, fluidity of the lamellae due to shear banding and defect pinning. These factors however, do not have any effect on alignment mechanism. Advisors/Committee Members: Kumaran, V (advisor).

Subjects/Keywords: Lamellar Mesophases; Structure - Rheology Coupling; Anisotropy Coupling; Shear Flow; Multiscale Modelling; Mesoscale Model; Macroscale Model; Lattice Boltzmann Simulations; Sheared Lamellar Fluid; Sheared Lamellar Liquid Medium; Lamellar Phase System; Chemical Engineering

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

APA (6^th Edition):

Jaju, S. J. (2018). Multi-scale Modelling of Lamellar Mesophases. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3621

Chicago Manual of Style (16^th Edition):

Jaju, S J. “Multi-scale Modelling of Lamellar Mesophases.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed April 17, 2021. http://etd.iisc.ac.in/handle/2005/3621.

MLA Handbook (7^th Edition):

Jaju, S J. “Multi-scale Modelling of Lamellar Mesophases.” 2018. Web. 17 Apr 2021.

Vancouver:

Jaju SJ. Multi-scale Modelling of Lamellar Mesophases. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Apr 17]. Available from: http://etd.iisc.ac.in/handle/2005/3621.

Council of Science Editors:

Jaju SJ. Multi-scale Modelling of Lamellar Mesophases. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3621

Indian Institute of Science

13. Ruhi, Ankit. Kinetic Theory Based Numerical Schemes for Incompressible Flows.

Degree: PhD, Faculty of Science, 2018, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/3072

► Turbulence is an open and challenging problem for mathematical approaches, physical modeling and numerical simulations. Numerical solutions contribute significantly to the understand of the nature… (more)

▼ Turbulence is an open and challenging problem for mathematical approaches, physical modeling and numerical simulations. Numerical solutions contribute significantly to the understand of the nature and effects of turbulence. The focus of this thesis is the development of appropriate numerical methods for the computer simulation of turbulent flows. Many of the existing approaches to turbulence utilize analogies from kinetic theory. Degond & Lemou (J. Math. Fluid Mech., 4, 257-284, 2002) derived a k-✏ type turbulence model completely from kinetic theoretic framework. In the first part of this thesis, a numerical method is developed for the computer simulation based on this model. The Boltzmann equation used in the model has an isotropic, relaxation collision operator. The relaxation time in the collision operator depends on the microscopic turbulent energy, making it diﬃcult to construct an eﬃcient numerical scheme. In order to achieve the desired numerical eﬃciency, an appropriate change of frame is applied. This introduces a stiff relaxation source term in the equations and the concept of asymptotic preserving schemes is then applied to tackle the stiffness. Some simple numerical tests are introduced to validate the new scheme. In the second part of this thesis, alternative approaches are sought for more eﬃcient numerical techniques. The Lattice Boltzmann Relaxation Scheme (LBRS) is a novel method developed recently by Rohan Deshmukh and S.V. Raghuram Rao for simulating compressible flows. Two different approaches for the construction of implicit sub grid scale -like models as Implicit Large Eddy Simulation (ILES) methods, based on LBRS, are proposed and are tested for Burgers turbulence, or Burgulence. The test cases are solved over a largely varying Reynolds number, demonstrating the eﬃciency of this new ILES-LBRS approach. In the third part of the thesis, as an approach towards the extension of ILES-LBRS to incompressible flows, an artificial compressibility model of LBRS is proposed. The modified framework, LBRS-ACM is then tested for standard viscous incompressible flow test cases. Advisors/Committee Members: Raghurama Rao, S V (advisor), Sekhar, M (advisor).

Subjects/Keywords: Turbulence Modeling; Incompressible Flows; Large Eddy Simulation (LES); Numerical Schemes; Turbulence Model; Lattice Boltzmann Relaxation Scheme (LBRS); Burgers Turbulence; Implicit Large Eddy Simulation (ILES); Turbulence Kinetic Theory; Turbulence; Mathematics

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

APA (6^th Edition):

Ruhi, A. (2018). Kinetic Theory Based Numerical Schemes for Incompressible Flows. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3072

Chicago Manual of Style (16^th Edition):

Ruhi, Ankit. “Kinetic Theory Based Numerical Schemes for Incompressible Flows.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed April 17, 2021. http://etd.iisc.ac.in/handle/2005/3072.

MLA Handbook (7^th Edition):

Ruhi, Ankit. “Kinetic Theory Based Numerical Schemes for Incompressible Flows.” 2018. Web. 17 Apr 2021.

Vancouver:

Ruhi A. Kinetic Theory Based Numerical Schemes for Incompressible Flows. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Apr 17]. Available from: http://etd.iisc.ac.in/handle/2005/3072.

Council of Science Editors:

Ruhi A. Kinetic Theory Based Numerical Schemes for Incompressible Flows. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3072

Oklahoma State University

14. Wiggs, Clifford Lee. Empirical Comparison of Three Existing Methods for Simulating Embers in Computer-generated Fire.

Degree: Computer Science Department, 2006, Oklahoma State University

URL: http://hdl.handle.net/11244/8265

► This study compares computer-generated embers using three existing methods. While there exists research related to fire propagation, flame rendering, and smoke generation, there is nothing… (more)

Subjects/Keywords: computer graphics; fire; lattice boltzmann model; particle system; computer generated image; fractal tree

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APA (6^th Edition):

Wiggs, C. L. (2006). Empirical Comparison of Three Existing Methods for Simulating Embers in Computer-generated Fire. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/8265

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):

Wiggs, Clifford Lee. “Empirical Comparison of Three Existing Methods for Simulating Embers in Computer-generated Fire.” 2006. Thesis, Oklahoma State University. Accessed April 17, 2021. http://hdl.handle.net/11244/8265.

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

MLA Handbook (7^th Edition):

Wiggs, Clifford Lee. “Empirical Comparison of Three Existing Methods for Simulating Embers in Computer-generated Fire.” 2006. Web. 17 Apr 2021.

Vancouver:

Wiggs CL. Empirical Comparison of Three Existing Methods for Simulating Embers in Computer-generated Fire. [Internet] [Thesis]. Oklahoma State University; 2006. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/11244/8265.

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

Council of Science Editors:

Wiggs CL. Empirical Comparison of Three Existing Methods for Simulating Embers in Computer-generated Fire. [Thesis]. Oklahoma State University; 2006. Available from: http://hdl.handle.net/11244/8265

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

15. Jain, Prashant K. Simulation of two-phase dynamics using lattice boltzmann method (LBM).

Degree: PhD, 0139, 2010, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/16046

► In this dissertation, a new lattice Boltzmann model, called the artificial interface lattice Boltzmann model (AILB model), is proposed for the simulation of two-phase dynamics.… (more)

▼ In this dissertation, a new lattice Boltzmann model, called the artificial interface lattice Boltzmann model (AILB model), is proposed for the simulation of two-phase dynamics. The model is based on the principle of free energy minimization and invokes the Gibbs-Duhem equation in the formulation of non-ideal forcing function. Bulk regions of the two phases are governed by a non-ideal equation of state (for example, the van der Waals equation of state), whereas an artificial near-critical equation of state is applied in the interfacial region. The interfacial equation of state is described by a double well density dependence of the free energy. The continuity of chemical potential is enforced at the interface boundaries. Using the AILB model, large density and viscosity ratios of the two phases can be simulated. The model is able to quantitatively capture the coexistence curve for the van der Waals equation of state for different temperatures. Moreover, spatially varying viscosities can be simulated by choosing the relaxation time as a function of local density. Suitable velocity and density (pressure) boundary conditions are also developed for the particle distribution functions in the framework of the proposed model. Boundary conditions for both the 2D as well as 3D domains are developed and relationships to evaluate unknown distribution functions are explicitly provided. Based on the Cahn???s wetting theory, physics governing the wall-fluid interactions is also developed in the framework of the AILB model. Using it, any specified contact angle (ranging from 0o to 180o) can be simulated at the walls of the domain. The proposed AILB model and the Lee-Fischer LB model are evaluated on several simple problems which involve interactions between two phases of a fluid and, between two phases and solid walls. Some of these problems in the order of increasing complexity are: the simulation of multi-fluid Poiseuille-Couette flow, specifying static bubbles/droplets in a periodic domain, two-bubble or two-drop coalescence, single rising bubble, break-up of a drop/bubble due to shearing walls, specifying different equilibrium contact angles on the surfaces, dynamics of drop/bubble in contact with a surface, etc. In addition, a simulation methodology based on the Peng-Robinson (P-R) equation of state has been devised in the LB framework. The developed P-R model can accurately predict phase-coexistence curve for water and steam at different system temperatures and allows simulation of phases with varying density/viscosity ratios. Thermal effects in the AILB model are simulated by employing a separate distribution function responsible for tracking the temperature dynamics. A phenomenological model to simulate evaporation and condensation is also developed in the framework of the proposed model. The thermal model is able to qualitatively capture the bubble growth and shrinking dynamics due to the variations in surrounding bulk temperatures. For the numerical analyses using the LBM, a computer code is developed to… Advisors/Committee Members: Uddin, Rizwan (advisor), Uddin, Rizwan (Committee Chair), Jones, Barclay G. (committee member), Axford, Roy A. (committee member), Johnson, Duane D. (committee member), Tentner, Adrian M. (committee member).

Subjects/Keywords: Lattice Boltzmann models (LBM); Two-phase flows; Artificial interface lattice Boltzmann model (AILB model); Gibbs-Duhem equation; Maxwell construction

…46 Artificial interface lattice Boltzmann (AILB) model… …the two-phase dynamics using a lattice Boltzmann model (LBM) based approach is… …scrutinized. In Chapter 4, an artificial interface lattice Boltzmann model (AILB) is… …34 3.2 Enskog equation based lattice Boltzmann equation… …47 4.2 Lattice Boltzmann (LB) equation…

10 more images…

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

APA (6^th Edition):

Jain, P. K. (2010). Simulation of two-phase dynamics using lattice boltzmann method (LBM). (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/16046

Chicago Manual of Style (16^th Edition):

Jain, Prashant K. “Simulation of two-phase dynamics using lattice boltzmann method (LBM).” 2010. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 17, 2021. http://hdl.handle.net/2142/16046.

MLA Handbook (7^th Edition):

Jain, Prashant K. “Simulation of two-phase dynamics using lattice boltzmann method (LBM).” 2010. Web. 17 Apr 2021.

Vancouver:

Jain PK. Simulation of two-phase dynamics using lattice boltzmann method (LBM). [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2010. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/2142/16046.

Council of Science Editors:

Jain PK. Simulation of two-phase dynamics using lattice boltzmann method (LBM). [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2010. Available from: http://hdl.handle.net/2142/16046

16. Audigier, Chloé. Modélisation de l’ablation radiofréquence pour la planification de la résection de tumeurs abdominales : Computational modeling of radiofrequency ablation for the planning and guidance of abdominal tumor treatment.

Degree: Docteur es, Automatique, traitement du signal et des images, 2015, Nice

URL: http://www.theses.fr/2015NICE4071

►

L'ablation par radiofréquence (ARF) de tumeurs abdominales est rendue difficile par l’influence des vaisseaux sanguins et les variations de la conductivité thermique, compliquant la planification… (more)

▼

L'ablation par radiofréquence (ARF) de tumeurs abdominales est rendue difficile par l’influence des vaisseaux sanguins et les variations de la conductivité thermique, compliquant la planification spécifique à un patient donné. En fournissant des outils prédictifs, les modèles biophysiques pourraient aider les cliniciens à planifier et guider efficacement la procédure. Nous introduisons un modèle mathématique détaillé des mécanismes impliqués dans l’ARF des tumeurs du foie comme la diffusion de la chaleur et la nécrose cellulaire. Il simule l’étendue de l’ablation à partir d’images médicales, d’après lesquelles des modèles personnalisés du foie, des vaisseaux visibles et des tumeurs sont segmentés. Dans cette thèse, une nouvelle approche pour résoudre ces équations basée sur la méthode de Lattice Boltzmann est introduite. Le modèle est d’abord évalué sur des données de patients qui ont subi une ARF de tumeurs du foie. Ensuite, un protocole expérimental combinant des images multi-modales, anatomiques et fonctionnelles pré- et post-opératoires, ainsi que le suivi de la température et de la puissance délivrée pendant l'intervention est présenté. Il permet une validation totale du modèle qui considère des données les plus complètes possibles. Enfin, nous estimons automatiquement des paramètres personnalisés pour mieux prédire l'étendu de l’ablation. Cette stratégie a été validée sur 7 ablations dans 3 cas cliniques. A partir de l'étude préclinique, la personnalisation est améliorée en comparant les simulations avec les mesures faites durant la procédure. Ces contributions ont abouti à des résultats prometteurs, et ouvrent de nouvelles perspectives pour planifier et guider l’ARF.

The outcome of radiofrequency ablation (RFA) of abdominal tumors is challenged by the presence of blood vessels and time-varying thermal conductivity, which make patient-specific planning extremely difficult. By providing predictive tools, biophysical models may help clinicians to plan and guide the procedure for an effective treatment. We introduce a detailed computational model of the biophysical mechanisms involved in RFA of hepatic tumors such as heat diffusion and cellular necrosis. It simulates the extent of ablated tissue based on medical images, from which patient-specific models of the liver, visible vessels and tumors are segmented. In this thesis, a new approach for solving these partial differential equations based on the Lattice Boltzmann Method is introduced. The model is first evaluated against clinical data of patients who underwent RFA of liver tumors. Then, a comprehensive pre-clinical experiment that combines multi-modal, pre- and post-operative anatomical and functional images, as well as the interventional monitoring of the temperature and delivered power is presented. This enables an end-to-end validation framework that considers the most comprehensive data set for model validation. Then, we automatically estimate patient-specific parameters to better predict the ablated tissue. This personalization strategy has been…

Advisors/Committee Members: Delingette, Hervé (thesis director), Ayache, Nicholas (thesis director).

Subjects/Keywords: Modélisation d'ARF; Foie; Personnalisation; Diffusion de la chaleur; Nécrose cellulaire; Mécanique des fluides; Modèle informatique; Méthode de Lattice Boltzmann; Estimation de paramètres; Étude préclinique; Imagerie médicale; RFA Modeling; Liver; Patient-Specific; Heat transfer; Cellular necrosis; Computational fluid dynamics; Computer model; Lattice Boltzmann method; Parameter estimation; Pre-clinical study; Medical imaging

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

APA (6^th Edition):

Audigier, C. (2015). Modélisation de l’ablation radiofréquence pour la planification de la résection de tumeurs abdominales : Computational modeling of radiofrequency ablation for the planning and guidance of abdominal tumor treatment. (Doctoral Dissertation). Nice. Retrieved from http://www.theses.fr/2015NICE4071

Chicago Manual of Style (16^th Edition):

Audigier, Chloé. “Modélisation de l’ablation radiofréquence pour la planification de la résection de tumeurs abdominales : Computational modeling of radiofrequency ablation for the planning and guidance of abdominal tumor treatment.” 2015. Doctoral Dissertation, Nice. Accessed April 17, 2021. http://www.theses.fr/2015NICE4071.

MLA Handbook (7^th Edition):

Audigier, Chloé. “Modélisation de l’ablation radiofréquence pour la planification de la résection de tumeurs abdominales : Computational modeling of radiofrequency ablation for the planning and guidance of abdominal tumor treatment.” 2015. Web. 17 Apr 2021.

Vancouver:

Audigier C. Modélisation de l’ablation radiofréquence pour la planification de la résection de tumeurs abdominales : Computational modeling of radiofrequency ablation for the planning and guidance of abdominal tumor treatment. [Internet] [Doctoral dissertation]. Nice; 2015. [cited 2021 Apr 17]. Available from: http://www.theses.fr/2015NICE4071.

Council of Science Editors:

Audigier C. Modélisation de l’ablation radiofréquence pour la planification de la résection de tumeurs abdominales : Computational modeling of radiofrequency ablation for the planning and guidance of abdominal tumor treatment. [Doctoral Dissertation]. Nice; 2015. Available from: http://www.theses.fr/2015NICE4071

17. 今川, 洋造. 実数型格子ガス法による熱流動解析に関する研究.

Degree: Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学

URL: http://hdl.handle.net/10119/1478

Supervisor:松澤照男

情報科学研究科

修士

Subjects/Keywords: 格子ガス法, 実数型格子ガス法, Maxwell-Boltzmann分布, Benard対流; lattice-gas model, continuous-velocity lattice-gas

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APA (6^th Edition):

今川, �. (n.d.). 実数型格子ガス法による熱流動解析に関する研究. (Thesis). Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学. Retrieved from http://hdl.handle.net/10119/1478

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

今川, 洋造. “実数型格子ガス法による熱流動解析に関する研究.” Thesis, Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学. Accessed April 17, 2021. http://hdl.handle.net/10119/1478.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

今川, 洋造. “実数型格子ガス法による熱流動解析に関する研究.” Web. 17 Apr 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

今川 �. 実数型格子ガス法による熱流動解析に関する研究. [Internet] [Thesis]. Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学; [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10119/1478.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

今川 �. 実数型格子ガス法による熱流動解析に関する研究. [Thesis]. Japan Advanced Institute of Science and Technology / 北陸先端科学技術大学院大学; Available from: http://hdl.handle.net/10119/1478

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Indian Institute of Science

18. Bhaskaracharya, Somashekaracharya G. Automatic Storage Optimization of Arrays Affine Loop Nests.

Degree: PhD, Faculty of Engineering, 2018, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/3208

► Efficient memory usage is crucial for data-intensive applications as a smaller memory footprint ensures better cache performance and allows one to run a larger problem… (more)

▼ Efficient memory usage is crucial for data-intensive applications as a smaller memory footprint ensures better cache performance and allows one to run a larger problem size given a axed amount of main memory. The solutions found by existing techniques for automatic storage optimization for arrays in a new loop-nests, which minimize the storage requirements for the arrays, are often far from good or optimal and could even miss nearly all storage optimization potential. In this work, we present a new automatic storage optimization framework and techniques that can be used to achieve intra-array as well as inter-array storage reuse within a new loop-nests with a pre-determined schedule. Over the last two decades, several heuristics have been developed for achieving complex transformations of a new loop-nests using the polyhedral model. However, there are no comparably strong heuristics for tackling the problem of automatic memory footprint optimization. We tackle the problem of storage optimization for arrays by formulating it as one of ending the right storage partitioning hyperplanes: each storage partition corresponds to a single storage location. Statement-wise storage partitioning hyperplanes are determined that partition a unit end global array space so that values with overlapping live ranges are not mapped to the same partition. Our integrated heuristic for exploiting intra-array as well as inter-array reuse opportunities is driven by a fourfold objective function that not only minimizes the dimensionality and storage requirements of arrays required for each high-level statement, but also maximizes inter-statement storage reuse. We built an automatic polyhedral storage optimizer called SMO using our storage partitioning approach. Storage reduction factors and other results we report from SMO demon-strate the e activeness of our approach on several benchmarks drawn from the domains of image processing, stencil computations, high-performance computing, and the class of tiled codes in general. The reductions in storage requirement over previous approaches range from a constant factor to asymptotic in the loop blocking factor or array extents { the latter being a dramatic improvement for practical purposes. As an incidental and related topic, we also studied the problem of polyhedral compilation of graphical data programs. While polyhedral techniques for program transformation are now used in several proprietary and open source compilers, most of the research on poly-herald compilation has focused on imperative languages such as C, where the computation is species in terms of statements with zero or more nested loops and other control structures around them. Graphical data ow languages, where there is no notion of statements or a schedule specifying their relative execution order, have so far not been studied using a powerful transformation or optimization approach. The execution semantics and ref-eventual transparency of data ow languages impose a di errant set of challenges. In this work, we attempt to bridge… Advisors/Committee Members: Bondhugula, Uday (advisor).

Subjects/Keywords: Automatic Storage Optimization; Dataflow Programs; Affine Loop Nests; Lattice-Boltzmann Method; Diamond Tiling; Blur Filter - Interleaved Schedule; Blur filter - Tiled Execution; Affine Hyperplane; Polyhedral Model; Polyhedral Storage Optimizer; Polyhedral Compilation; PolyGLoT; Polyhedral Loop Transformation; Graphical Dataflow Language; Intra-Array Sorage Optimization; Arrays Storage Optimization; Computer Science

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APA (6^th Edition):

Bhaskaracharya, S. G. (2018). Automatic Storage Optimization of Arrays Affine Loop Nests. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3208

Chicago Manual of Style (16^th Edition):

Bhaskaracharya, Somashekaracharya G. “Automatic Storage Optimization of Arrays Affine Loop Nests.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed April 17, 2021. http://etd.iisc.ac.in/handle/2005/3208.

MLA Handbook (7^th Edition):

Bhaskaracharya, Somashekaracharya G. “Automatic Storage Optimization of Arrays Affine Loop Nests.” 2018. Web. 17 Apr 2021.

Vancouver:

Bhaskaracharya SG. Automatic Storage Optimization of Arrays Affine Loop Nests. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Apr 17]. Available from: http://etd.iisc.ac.in/handle/2005/3208.

Council of Science Editors:

Bhaskaracharya SG. Automatic Storage Optimization of Arrays Affine Loop Nests. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3208

19. PENG YAN. Simulations of incompressible viscous thermal flows by Lattice Boltzmann method.

Degree: 2005, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/14502

Subjects/Keywords: Lattice Boltzmann method; finite volume LBM; TLLBM; IEDDF thermal model; incompressible viscous thermal flows; axisymmetrical thermal flows

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APA (6^th Edition):

YAN, P. (2005). Simulations of incompressible viscous thermal flows by Lattice Boltzmann method. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/14502

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):

YAN, PENG. “Simulations of incompressible viscous thermal flows by Lattice Boltzmann method.” 2005. Thesis, National University of Singapore. Accessed April 17, 2021. http://scholarbank.nus.edu.sg/handle/10635/14502.

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

MLA Handbook (7^th Edition):

YAN, PENG. “Simulations of incompressible viscous thermal flows by Lattice Boltzmann method.” 2005. Web. 17 Apr 2021.

Vancouver:

YAN P. Simulations of incompressible viscous thermal flows by Lattice Boltzmann method. [Internet] [Thesis]. National University of Singapore; 2005. [cited 2021 Apr 17]. Available from: http://scholarbank.nus.edu.sg/handle/10635/14502.

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

Council of Science Editors:

YAN P. Simulations of incompressible viscous thermal flows by Lattice Boltzmann method. [Thesis]. National University of Singapore; 2005. Available from: http://scholarbank.nus.edu.sg/handle/10635/14502

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

University of Central Florida

20. Thakore, Vaibhav. Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-electrode Interface.

Degree: 2012, University of Central Florida

URL: https://stars.library.ucf.edu/etd/2465

► Extracellular neuroelectronic interfacing has important applications in the fields of neural prosthetics, biological computation and whole-cell biosensing for drug screening and toxin detection. While the… (more)

▼ Extracellular neuroelectronic interfacing has important applications in the fields of neural prosthetics, biological computation and whole-cell biosensing for drug screening and toxin detection. While the field of neuroelectronic interfacing holds great promise, the recording of high-fidelity signals from extracellular devices has long suffered from the problem of low signal-to-noise ratios and changes in signal shapes due to the presence of highly dispersive dielectric medium in the neuron-microelectrode cleft. This has made it difficult to correlate the extracellularly recorded signals with the intracellular signals recorded using conventional patch-clamp electrophysiology. For bringing about an improvement in the signalto-noise ratio of the signals recorded on the extracellular microelectrodes and to explore strategies for engineering the neuron-electrode interface there exists a need to model, simulate and characterize the cell-sensor interface to better understand the mechanism of signal transduction across the interface. Efforts to date for modeling the neuron-electrode interface have primarily focused on the use of point or area contact linear equivalent circuit models for a description of the interface with an assumption of passive linearity for the dynamics of the interfacial medium in the cell-electrode cleft. In this dissertation, results are presented from a nonlinear dynamic characterization of the neuroelectronic junction based on Volterra-Wiener modeling which showed that the process of signal transduction at the interface may have nonlinear contributions from the interfacial medium. An optimization based study of linear equivalent circuit models for representing signals recorded at the neuron-electrode interface subsequently iv proved conclusively that the process of signal transduction across the interface is indeed nonlinear. Following this a theoretical framework for the extraction of the complex nonlinear material parameters of the interfacial medium like the dielectric permittivity, conductivity and diffusivity tensors based on dynamic nonlinear Volterra-Wiener modeling was developed. Within this framework, the use of Gaussian bandlimited white noise for nonlinear impedance spectroscopy was shown to offer considerable advantages over the use of sinusoidal inputs for nonlinear harmonic analysis currently employed in impedance characterization of nonlinear electrochemical systems. Signal transduction at the neuron-microelectrode interface is mediated by the interfacial medium confined to a thin cleft with thickness on the scale of 20-110 nm giving rise to Knudsen numbers (ratio of mean free path to characteristic system length) in the range of 0.015 and 0.003 for ionic electrodiffusion. At these Knudsen numbers, the continuum assumptions made in the use of Poisson-Nernst-Planck system of equations for modeling ionic electrodiffusion are not valid. Therefore, a lattice Boltzmann method (LBM) based multiphysics solver suitable for modeling ionic electrodiffusion at the mesoscale neuron-microelectrode… Advisors/Committee Members: Hickman, James.

Subjects/Keywords: Whole cell biosensors; cell sensor interface; neuron electrode interface; neuroelectronic interfacing; microelectrode arrays; meas; field effect transistor (fet) arrays; limitations of equivalent circuit models; volterra wiener modeling; nonlinear dynamic modeling; nonlinear impedance spectroscopy; lattice boltzmann method; lattice poisson boltzmann method; multiphysics solver; entrance flow problem; surface chemical reaction; electroosmotic flow; ionic electrodiffusion; molecular speed dependent relaxation time; primitive model of electrolyte; charge relaxation dynamics; electrolytic nanocapacitor; effect of nanoscale confinement; overlapping electric double layers; electric double layer relaxation; transient charging dynamics of an electrolytic capacitor; anomalous plasma like collective oscillations; viscous drag force on ions in a solvent; synergistic modeling of the cell sensor interface; Physics; Dissertations, Academic – Sciences, Sciences – Dissertations, Academic

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

APA (6^th Edition):

Thakore, V. (2012). Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-electrode Interface. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/2465

Chicago Manual of Style (16^th Edition):

Thakore, Vaibhav. “Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-electrode Interface.” 2012. Doctoral Dissertation, University of Central Florida. Accessed April 17, 2021. https://stars.library.ucf.edu/etd/2465.

MLA Handbook (7^th Edition):

Thakore, Vaibhav. “Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-electrode Interface.” 2012. Web. 17 Apr 2021.

Vancouver:

Thakore V. Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-electrode Interface. [Internet] [Doctoral dissertation]. University of Central Florida; 2012. [cited 2021 Apr 17]. Available from: https://stars.library.ucf.edu/etd/2465.

Council of Science Editors:

Thakore V. Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-electrode Interface. [Doctoral Dissertation]. University of Central Florida; 2012. Available from: https://stars.library.ucf.edu/etd/2465

University of Queensland

21. Li, Zi. The role of interphase boundary in permeability estimation for saturated (unsaturated) porous media.

Degree: School of Civil Engineering, 2019, University of Queensland

URL: https://espace.library.uq.edu.au/view/UQ:c383017/s4372310_final_thesis.pdf ; https://espace.library.uq.edu.au/view/UQ:c383017

Subjects/Keywords: Liquid slippage; Fluid-solid interaction; Slip length; Permeability ratio; Multiphase porous media flow; Steady-state; Fluid distribution; Relative permeability; Lattice Boltzmann model; Pore scale simulation; 0905 Civil Engineering

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

APA (6^th Edition):

Li, Z. (2019). The role of interphase boundary in permeability estimation for saturated (unsaturated) porous media. (Thesis). University of Queensland. Retrieved from https://espace.library.uq.edu.au/view/UQ:c383017/s4372310_final_thesis.pdf ; https://espace.library.uq.edu.au/view/UQ:c383017

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, Zi. “The role of interphase boundary in permeability estimation for saturated (unsaturated) porous media.” 2019. Thesis, University of Queensland. Accessed April 17, 2021. https://espace.library.uq.edu.au/view/UQ:c383017/s4372310_final_thesis.pdf ; https://espace.library.uq.edu.au/view/UQ:c383017.

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, Zi. “The role of interphase boundary in permeability estimation for saturated (unsaturated) porous media.” 2019. Web. 17 Apr 2021.

Vancouver:

Li Z. The role of interphase boundary in permeability estimation for saturated (unsaturated) porous media. [Internet] [Thesis]. University of Queensland; 2019. [cited 2021 Apr 17]. Available from: https://espace.library.uq.edu.au/view/UQ:c383017/s4372310_final_thesis.pdf ; https://espace.library.uq.edu.au/view/UQ:c383017.

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

Council of Science Editors:

Li Z. The role of interphase boundary in permeability estimation for saturated (unsaturated) porous media. [Thesis]. University of Queensland; 2019. Available from: https://espace.library.uq.edu.au/view/UQ:c383017/s4372310_final_thesis.pdf ; https://espace.library.uq.edu.au/view/UQ:c383017

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

22. Shabro, Vahid. Pore-scale numerical modeling of petrophysical properties with applications to hydrocarbon-bearing organic shale.

Degree: PhD, Petroleum Engineering, 2013, University of Texas – Austin

URL: http://hdl.handle.net/2152/22902

► The main objective of this dissertation is to quantify petrophysical properties of conventional and unconventional reservoirs using a mechanistic approach. Unconventional transport mechanisms are described… (more)

▼ The main objective of this dissertation is to quantify petrophysical properties of conventional and unconventional reservoirs using a mechanistic approach. Unconventional transport mechanisms are described from the pore to the reservoir scale to examine their effects on macroscopic petrophysical properties in hydrocarbon-bearing organic shale. Petrophysical properties at the pore level are quantified with a new finite-difference method. A geometrical approximation is invoked to describe the interstitial space of grid-based images of porous media. Subsequently, a generalized Laplace equation is derived and solved numerically to calculate fluid pressure and velocity distributions in the interstitial space. The resulting macroscopic permeability values are within 6% of results obtained with the Lattice-Boltzmann method after performing grid refinements. The finite-difference method is on average six times faster than the Lattice-Boltzmann method. In the next step, slip flow and Knudsen diffusion are added to the pore-scale method to take into account unconventional flow mechanisms in hydrocarbon-bearing shale. The effect of these mechanisms is appraised with a pore-scale image of Eagle Ford shale as well as with several grain packs. It is shown that neglecting slip flow in samples with pore-throat sizes in the nanometer range could result in errors as high as 2000% when estimating permeability in unconventional reservoirs. A new fluid percolation model is proposed for hydrocarbon-bearing shale. Electrical conductivity is quantified in the presence of kerogen, clay, hydrocarbon, water, and the Stern-diffuse layer in grain packs as well as in the Eagle Ford shale pore-scale image. The pore-scale model enables a critical study of the [delta]LogR evaluation method commonly used with gas-bearing shale to assess kerogen concentration. A parallel conductor model is introduced based on Archie's equation for water conductivity in pores and a parallel conductive path for the Stern-diffuse layer. Additionally, a non-destructive core analysis method is proposed for estimating input parameters of the parallel conductor model in shale formations. A modified reservoir model of single-phase, compressible fluid is also developed to take into account the following unconventional transport mechanisms: (a) slip flow and Knudsen diffusion enhancement in apparent permeability, (b) Langmuir desorption as a source of gas generation at kerogen surfaces, and (c) the diffusion mechanism in kerogen as a gas supply to adsorbed layers. The model includes an iterative verification method of surface mass balance to ensure real-time desorption-adsorption equilibrium with gas production. Gas desorption from kerogen surfaces and gas diffusion in kerogen are the main mechanisms responsible for higher-than-expected production velocities commonly observed in shale-gas reservoirs. Slip flow and Knudsen diffusion marginally enhance production rates by increasing permeability during production. Advisors/Committee Members: Torres-Verdín, Carlos (advisor), Sepehrnoori, Kamy, 1951- (advisor).

Subjects/Keywords: Pore-scale model; Finite-difference; Shale-gas; Hydrocarbon-bearing shale; Electrical resistivity; Permeability; FIB-SEM; Lattice-Boltzmann method; Knudsen diffusion; Langmuir desorption; Diffusion in kerogen; Organic matter

…cellular automaton (Rothman, 1988); the Lattice-Boltzmann method (LBM) (… …The Lattice-Boltzmann method (Arns et al., 2004; Guo and Zhao, 2002; Jin et al., 2007… …and Patzek, 2009). Two-phase lattice Boltzmann implementations in porous materials are… …estimating permeability in unconventional reservoirs. A new fluid percolation model is proposed for… …pore-scale image. The pore-scale model enables a critical study of the ΔLogR evaluation…

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APA (6^th Edition):

Shabro, V. (2013). Pore-scale numerical modeling of petrophysical properties with applications to hydrocarbon-bearing organic shale. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/22902

Chicago Manual of Style (16^th Edition):

Shabro, Vahid. “Pore-scale numerical modeling of petrophysical properties with applications to hydrocarbon-bearing organic shale.” 2013. Doctoral Dissertation, University of Texas – Austin. Accessed April 17, 2021. http://hdl.handle.net/2152/22902.

MLA Handbook (7^th Edition):

Shabro, Vahid. “Pore-scale numerical modeling of petrophysical properties with applications to hydrocarbon-bearing organic shale.” 2013. Web. 17 Apr 2021.

Vancouver:

Shabro V. Pore-scale numerical modeling of petrophysical properties with applications to hydrocarbon-bearing organic shale. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2013. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/2152/22902.

Council of Science Editors:

Shabro V. Pore-scale numerical modeling of petrophysical properties with applications to hydrocarbon-bearing organic shale. [Doctoral Dissertation]. University of Texas – Austin; 2013. Available from: http://hdl.handle.net/2152/22902

23. Zhang, Steven. Formation Mechanism and Computational Modelling of Isle of Rum Plagioclase Stellates .

Degree: 2013, University of Ottawa

URL: http://hdl.handle.net/10393/24068

► We propose a hypothesis and a numerical model for the formation of branching plagioclase textures visible at both macroscopic (∼cm to ∼m) and microscopic scale… (more)

Subjects/Keywords: plagioclase stellate; Rum; plagioclase stellates; Lattice Boltzmann; Immiscible; spinodal decomposition; epitaxy; phase transition; phase transitions; stochastic; formation hypothesis; plagioclase rays; plagioclase networks; macroscopic pattern; pattern formation; twinning; numerical model; unmixing; nucleation; crystallization

…space to eventually produce the Lattice Boltzmann equation. The equilibrium distribution… …limits of the model and discusses the lattice parameters and their (if extant)… …numerical model is proposed and the results are analyzed and discussed. This thesis has five main… …the model and the last two presenting the results and supporting discussions. Chapter 2… …synthesize a corresponding numerical simulation proposition based on a combination of Lattice…

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APA (6^th Edition):

Zhang, S. (2013). Formation Mechanism and Computational Modelling of Isle of Rum Plagioclase Stellates . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/24068

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):

Zhang, Steven. “Formation Mechanism and Computational Modelling of Isle of Rum Plagioclase Stellates .” 2013. Thesis, University of Ottawa. Accessed April 17, 2021. http://hdl.handle.net/10393/24068.

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

MLA Handbook (7^th Edition):

Zhang, Steven. “Formation Mechanism and Computational Modelling of Isle of Rum Plagioclase Stellates .” 2013. Web. 17 Apr 2021.

Vancouver:

Zhang S. Formation Mechanism and Computational Modelling of Isle of Rum Plagioclase Stellates . [Internet] [Thesis]. University of Ottawa; 2013. [cited 2021 Apr 17]. Available from: http://hdl.handle.net/10393/24068.

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

Council of Science Editors:

Zhang S. Formation Mechanism and Computational Modelling of Isle of Rum Plagioclase Stellates . [Thesis]. University of Ottawa; 2013. Available from: http://hdl.handle.net/10393/24068

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

Open Access Theses and Dissertations