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.
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Showing 1 to 20 of 48 for “"Pore network"”.
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Predicting Flow in Firebrand Pile using Pore Network Model
… more accurate in the porosity range of interest. Pore network models were developed for the simulation of flow profiles utilizing the permeability data collected. The non-uniform network, which better represents a randomly stack firebrand pile, resulted in a more complex multidimensional flow …
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Analysis of Pore -Scale Nonaqueous Phase Liquid Dissolution in Etched Silicon Pore Network
… these mass transfer coefficients varied with pore and NAPL blob geometry. Specifically, the mass transfer coefficient decreased with increasing blob size because larger blobs had more NAPL-water interfacial area not adjacent to flowing water, and with decreasing pore throat width to pore …
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Extraction of physically-realistic pore network properties from three-dimensional synchrotron microtomography images of unconsolidated porous media
… were developed to extract physically-realistic pore-network structure from unconsolidated porous media systems imaged using synchrotron microtomography. The structure can be used to correlate pore-scale phenomena with the pore structure and can also be incorporated into a pore-network model to …
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Impacts of Rock-Brine Interactions on Petrophysical Properties of a Sandstone Reservoir, Utilizing Geochemical and Pore Network Modeling
… reactions are anticipated. Results show that the pore space volume change is negligible. Feldspar transformation to clay minerals, however, has been observed as a mineral conversion process which is expected to impact permeability. Pore Network Modeling has been utilized to investigate the impact …
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Three-Dimensional Reconstruction of Marine Clay Nano- and Microstructure By Transmission Electron Microscopy: Analysis of Fabric and Pore Network
… I created 3-D reconstructions of clay fabric and pore pathways from serial sections and photographic mosaics obtained using transmission electron microscopy. These reconstructions show aggregations of clay domains, surrounding OM, and pore networks. I examined a Model sample (laboratory …
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Extracting Physically Realistic Pore Network Features from XCT Data and Investigating the Impact of Pore Topology on Flow in Porous Media
… transport properties via image processing and pore scale simulations through XCT image data sets of porous media. This study also shows how XCT imaging, coupled with pore topological and morphological measures can be utilized in quantifying the differences, and/or similarities between a 2.5D …
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Investigating the adsorption and transport of water in MFI zeolite pores for water desalination
… salt rejection. Zeolites provide a model porous network which is capable of performing this type of molecular sieve separation. However, a lack of understanding of the mechanisms that govern transport within the zeolite pore network as well as an insufficient control of membrane synthesis has …
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Experimentelle und theoretische Ansätze zur Entschwefelung eines mit Kohlenwasserstoffen beladenen Gases
… and mass transfers has been considered using a pore network.
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Experimental and computational analysis of random cylinder packings with applications
… void space in the packings was expressed as a pore network, which retains topological and geometrical information. The significance of this approach is that any irregular continuous porous space can be approximated as a mathematically tractable pore network, thus allowing for efficient …
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The effect of calcium and magnesium on carbonate mineral precipitation during reactive transport in a model subsurface pore structure
… result in physical and chemical changes in the pore network. This can affect the effectiveness of various applications including carbon sequestration and in situ remediation. In this work we evaluate the precipitation kinetics of carbonates in a microfluidic pore network when carbonate in water …
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Experimental and Modelign of Foam Physics in Porous Media
… develop ultimately a mechanistic, physical-based pore network model to improve the understanding of multiple pore-level mechanisms involved during foam propagation in porous media. To this aim, a pore network model is developed to simulate foam propagation as a drainage process of gas invasion …
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tle:43042b35-20c6-4eb2-a026-32c858dd4679:d6bd9758-527a-46cd-bfe2-c433766e8fca:1
… has been accomplished through the use of modern pore network extraction (PNE) techniques to characterise the pore space within the meniscus, a soft tissue situated inside the knee which is fundamental for the correct functioning of the joint. While these PNE techniques were not primarily designed …
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Osteogenic and chondrogenic differentiation of rat bone marrow stromal cells in 3D culture with novel PCL-TCP scaffolds
… 3D structures with a completely interconnected pore network and custom-tailored porosity and pore size. After expansion in vitro, BMSCs were enzymatically lifted and then seeded with fibrin glue as cell suspensions into PCL-TCP scaffolds. The cell-scaffold constructs were cultured for 3 weeks in …
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Improving capabilities of pore-scale modeling of multiphase flow for geological storage of CO2
… 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 storage capacity to host injected CO2 for long-term …
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Quantification of short term interactions between soil and fungi
… soil bulk-density on key descriptors of the soil pore network. Finally, a fungal growth model was used to quantify to what extent soil structure mediated by bulk-density affected fungal growth dynamics.<br/> The experimental work showed that despite high fungal biomass content there was no effect …
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Image-Based Quantification and Coupled PNM-FEM of Architecture, Deformation, and Fluid Dynamics in Biological Porous Media Under Mechanical Loading
… describes an image-based method that integrates Pore Network Modeling (PNM), Finite Element Method (FEM), and statistical image analysis to study the involvement of fluid on the mechanical responses of load-bearing connective tissues. The extracellular matrix (ECM), a porous scaffold filled with …
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Micromechanical study of two-phase flow during air sparging
… between injected air and contaminated soil and pore fluid. Hence, characterizing the mechanisms governing movement of air through saturated porous media is therefore critical to the design of an effective cleanup treatment. However, in spite of the success of air sparging as a remediation …
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Design and Development of Biocompatible MOFS and Silica-Based Nanocarriers with Controlled Pharmacokinetics for Drug Delivery Applications
… high surface area and highly structured porous network. The overall goal of this research was to optimize the pharmacokinetic behavior of several highly porous biocompatible drug carriers that have the potential to carry Ibuprofen, 5-Fluorouracil, and Curcumin to the desired tissue without …
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Finite Element Modeling of Steel Corrosion in Concrete Structures
… of chemical species through the concrete pore network. Reliable and robust analytical tools are required to allow multi-physics simulations of steel corrosion. This study has developed a nonlinear finite element analysis program, called VT-MultiPhys, to enable multi-physics simulations, …
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Long-term response of soils subjected to repetitive geoenvironmental loads
… the effect of the crystallization force. Pore network topology and surface wetting characteristics govern crystal growth patterns. Pore fluid chemistry cycles in fine-grained soils alter particle level electrical forces and particle-particle associations. The soil fabric evolves with …
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