Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"Pore-scale modeling"”.
-
Multiphysics Transport in Heterogeneous Media: from Pore-Scale Modeling to Deep Learning
… of these applications. In this dissertation, nanoscale transport phenomena in porous media are studied through physics-based simulations, and the effective solution of forward and inverse transport phenomena problems in heterogeneous media is tackled using data-driven, deep learning approaches. …
-
Image-Based Pore-Scale Modeling of Inertial Flow in Porous Media and Propped Fractures
… flow and fundamentally understanding the pore-scale inertial flow is important to oil and gas production in hydraulic fractures. Image-based pore-scale modeling is a powerful approach to obtain macroscopic transport properties of porous media, which are traditionally obtained from …
-
Improving capabilities of pore-scale modeling of multiphase flow for geological storage of CO2
This dissertation presents a computational modeling framework to address current challenges in pore-scale modeling of two-phase flow with applications to sequestration of carbon dioxide (CO2) in deep saline geological formations. These formations are widely available and have relatively high …
-
Analysis of Solute Mixing at the Pore-Scale Using Micromodels and Lattice -Boltzmann Finite Volume Modeling
… bi-molecular reaction utilizing a combination of pore scale modeling and high-resolution 2D micromodels. To evaluate reactive transport, two reactive substrates are introduced into a network of pores via two separate and parallel fluid streams. The substrates mix within the porous media via …
-
Micro-Scale Simulation of Evaporation, Condensation and Transport in Porous Media
Sub-pore scale modeling of flow in porous media is gaining momentum. The concept of Digital Core Analysis deals with measurements of virtual core and the purpose of such modeling is to replace conventional and special core analysis when the latter are not feasible. One of the challenging concepts …
-
Analytical Modeling of Bentonite Swelling and Numerical Reactive Transport Modeling in Nuclear Waste Disposal Systems
… are able to be exchanged by K+ in pore fluid at high temperature and form illite. This illitization process would reduce the amount of montmorillonite in the bentonite. Since illite is an unexpansive clay mineral, illitization may result in cracking on the barrier and subsequently …
-
Modeling the flow of non-Newtonian fluids in packed beds at the pore scale
… enhanced oil recovery. The general approach to modeling such processes is at the continuum scale. Semi-empirical expressions, such as Darcy's law, are substituted for velocity in the continuity equation, which is then coupled with a momentum, mass, and energy balance. While a continuum approach …
-
Transport and seismoelectric properties of porous permeable rock : numerical modeling and laboratory measurements
… of rock transport properties, together with pore geometry, can aid us to better quantify the frequency dependence of its SE coupling coefficient. With the development of micro-CT (pCT) scanners, microstructure of the sedimentary rock can now be obtained in three dimensions at micron level …
-
Modeling single-phase flow and solute transport across scales
… to kilometers) and time (nanoseconds to years) scales, and frequently arise in applications of CO₂ sequestration, pollutant transport, and near-well acid stimulation. Reliable field-scale predictions depend on our predictive capacity at each individual scale as well as our ability to accurately …
-
Numerical studies of flow in porous media using an unstructured approach
… an inability to accurately describe the internal pore-structure has prevented detailed study of the role of pore structure on transport. In recent decades however, the combination of high resolution imaging technologies with computational modeling has seen the development of fundamental pore-scale …
-
Geometry-based finite volume methods for modelling transport on micro-CT images
… additional flow mechanisms. In this Thesis, a Pore-scale Finite Volume Solver (PFVS) is proposed that solves an elliptic diffusion equation to obtain the spatial pressure distribution on the entire micro-CT image. The flow results have 11% error compared to other solvers such as Stokes solver …
-
Nonequilibrium Phenomena in Multiphase Flow, Transport, and Phase Change in Porous Media: Pore-Level Physics, Network Modeling, and Upscaling
… complex physical processes requires quantitative modeling approaches across scales---from pore-scale (e.g., nanometer to millimeter), to representative-elementary-volume (REV)-scale (e.g., centimeter to meter), to field-scale (e.g., meter to kilometer). To date, most field-scale models are built …
-
Approximating three-dimensional fluid flow in a microfluidic device with a two-dimensional, depth-averaged lattice Boltzmann method
… channels with regular or irregular interior pore structure. The success of these reactive transport models is dependent on accurate determination of the velocity field, because reaction is coupled to solute transport. The small aspect ratio of these devices has led to their approximation as …