Browsing Theses by Subject "porous media"
Now showing items 1-11 of 11
-
Additively-manufactured Deterministic Porous Structures for Transpiration Cooling
(University of Waterloo, 2023-07-17)Transpiration cooling is increasingly being studied as a method of thermal protection in hypersonic flight, rocket engine liners, and gas turbines. To date, materials for transpiration cooling have been restricted to porous ... -
Capacitive Storage of Ions Modelled in a Pore Network using Electrical Double Layer Theories: Helmholtz, Gouy-Chapman-Stern, and modified Donnan
(University of Waterloo, 2021-09-01)Capacitive Deionization (CDI) is an electro-driven water desalination technology that has been researched extensively over the last two decades. A CDI cell consists of a pair of charged porous electrodes separated by a ... -
Determination of Characteristic Transport Coefficients of Porous Media from Volumetric Images using the Diffuse Interface Method
(University of Waterloo, 2021-11-24)Transport in engineered materials such as electrodes, membranes, filters, and natural materials such as rock, sand, soil can be modeled as transport in porous media. Direct Numerical Simulations (DNS) on volumetric images ... -
Determining relaxation times for porous media: Theory, measurement, and the inverse problem
(University of Waterloo, 2007-08-03)This thesis provides an introduction to and analysis of the problem of determining nuclear magnetic resonance (NMR) relaxation times of porous media by using the so-called Carr-Purcell-Meiboom-Gill (CPMG) technique. We ... -
Development of a predictive model for the VAPEX process.
(University of Waterloo, 2019-01-11)Heavy oil in-situ recovery in Canada is largely achieved through energy intensive and en- vironmentally detrimental steam assisted gravity drainage (SAGD). By exchanging steam for a vapour solvent, it has been shown ... -
Emerging Contaminants: Artificial Sweetener Sample Preservation and Palladium Nanoparticle Transport in Porous Media
(University of Waterloo, 2017-04-25)Emerging contaminants are an increasing concern for regulatory bodies: artificial sweeteners and nanoparticles (NPs) included. Artificial sweeteners are found in domestic waste waters and can be used as tracers of anthropogenic ... -
Ethyl Cellulose Nanoparticles in Multiphase Systems: Foams, Emulsions, and Porous Media
(University of Waterloo, 2017-08-18)Adsorption-mediated self-assembly of ethyl cellulose (EC) nanoparticles at fluid interfaces, driven by reduction in interfacial energy, is shown to lead to stabilization of emulsions and foams. A multiscale approach is ... -
Mass Transfer to/from Distributed Sinks/Sources in Porous Media
(University of Waterloo, 2006-12-18)This research addresses a number of fundamental issues concerning convective mass transfer across fluid-fluid interfaces in porous media. Mass transfer to/from distributed sinks/sources is considered for i) the slow ... -
Multiphysics Modelling of Energy Storage Devices Using Pore Scale Approaches
(University of Waterloo, 2020-12-16)The advancement in high-resolution X-ray tomography image acquisition techniques has enabled imaged-based modelling of pore-scale transport processes to better understand structural performance relationship in porous media. ... -
Pore Network Modeling of Hydrodynamic Dispersion and Irreversible Adsorption of Nanoparticles in Partially Saturated Granular Media
(University of Waterloo, 2022-07-20)The transport of nanoparticles in porous media, whether deliberate or accidental, is of critical importance in several fields including migration of contaminants, wastewater clean-up, and enhanced oil recovery. Pore scale ... -
Simulated Annealing Reconstruction and Effective Transport Properties of PEM Fuel Cell Catalyst Layers
(University of Waterloo, 2023-11-15)A proton exchange membrane fuel cell (PEMFC) is an energy-conversion device that can be used in a wide variety of applications and is considered a promising alternative to gas and diesel engines for vehicular purposes. ...