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Showing 1 to 20 of 34 for “"transport in porous media"”.
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Stochastic modelling of contaminant transport in porous media
The stochastic model of solute transport describes the motion of fluid elements in a porous medium as stochastic variation of the fluid velocity, produced by pore wall impacts. This gives a stochastic differential equation for fluid displacements, and solute transport is obtained as the cumulative …
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Pore Scale Simulation of Transport in Porous Media
When performing solute transport in porous media one often observes an asymmetric break-through curve with a very slow decline of the concentration. This phenomenon even appears with non-sorbing solutes and is known as tailing. There are several hypotheses to explain this phenomenon. The modelling …
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Simulation of filtration for suspension transport in porous media
… and application of a novel method for analyzing the filtration of particles transported through a granular porous medium. The proposed analysis considers the deposition of particles through discrete simulations of particle-laden flow in a cylindrical model pore. The pore model assumes that …
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Stabilization of Magnetite Nanofluid and its Transport in Porous Media
The objective of the research is to test the transportability of magnetic (magnetite, Fe3O4) nanoparticles in porous media and evaluate its application as a subsurface monitoring tool. The unique properties of magnetic nanoparticles make them a strong contrast agent against reservoir rocks and …
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Structure-Preserving High Performance Computational Methods for Transport in Porous Media
This dissertation aims at developing a novel and robust high performing paral- lel computational framework that can enhance the current predictive capabilities of numerical methods for large-scale subsurface transport applications. With increasing capacity and complexity of processors and memory …
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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 …
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Upscaling reactive transport in porous media : laboratory visualization and stochastic models
Solute transport models are essential tools for understanding and forecasting chemical concentrations in groundwater. Advection-dispersion based models can adequately predict spatial averages of conservative solute concentrations without using explicit maps of pore structures or variations in …
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Bottom-up theoretical frameworks for upscaling transient mass transport in porous media
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Developing NMR/MRI Techniques for Characterisation of Reactive Transport in Porous Media
Reactive flow in porous media is a complex transport phenomenon which involves the simultaneous flow and reaction of a fluid in a porous medium and plays a critical role in improving our understanding of carbon sequestration. When CO<sub>2</sub> is introduced into a storage site, which might be a …
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Deep neural networks as data-driven models for flow and transport in porous media
… è presente nell'allegato / the abstract is in the attachment
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Discrete particle transport in porous media : discrete observations of physical mechanisms influencing particle behavior
An understanding of how discrete particles in the micron to submicron range behave in porous media is important to a number of environmental problems. Discrete particle behavior in the interior of a porous medium is complex and influenced by various physical and chemical factors. This work aimed to …
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A fast characteristic finite difference method for fractional advection-diffusion equations with non-linear reaction.
Contaminant transport in porous media can be modeled with fractional differential equations. This approach results in early arrival of contaminants and heavy-tail distributions observed in field experiments. The implicit finite difference scheme with the shifted Grunwald approximation discritizing …
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Modeling the flow of non-Newtonian fluids in packed beds at the pore scale
Flow and transport in porous media are important in many science and engineering applications such as composite materials, subsurface water contamination, packed-bed reactors, and enhanced oil recovery. The general approach to modeling such processes is at the continuum scale. Semi-empirical …
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Analysis of Flow and Transport in Refractive Index Matched Porous Media
In the present work a novel method for the measurement of flow and transport in porous media has been developped. Through the employment of particularly applicative solids, liquids and fluorescent dyes and the application of a method for the highly precise matching of refractive indices, the …
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Experimental Investigations on Multiphase Phenomena in Porous Media
Modeling of waterflow and solute transport in porous media is typically based on the water dynamics only, while the gaseous phase is neglected. Since the two fluids share the same pore space a particular investigation of the gaseous phase is mandatory to understand its influence on the basic …
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THE MOBILITY OF ENGINEERED MULTI-WALLED CARBON NANOTUBES IN POROUS MEDIA
Nanotechnology has become the focus of intense interest and excitement over the last 20 years. The unique physical, chemical, and electronical properties of nanomaterials make them one of the most promising novel classes of materials with many potential applications. However, these materials will …
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A locally conservative variational multiscale method for the simulation of porous media flow with multiscale source terms
Multiscale phenomena are ubiquitous to flow and transport in porous media. They manifest themselves through at least the following three facets: (1) effective parameters in the governing equations are scale dependent; (2) some features of the flow (especially sharp fronts and boundary layers) …
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Patterns and mechanisms of heat transport in the northern Denver Basin Nebraska, South Dakota and Wyoming
Finite difference simulations of the hydrothermal system of the northern Denver Basin are suggestive of a correlation between anomalous heat flux and the presence of faults and structural lineaments mapped in the region. Geothermal, hydrogeological, lithological, and structural data available for …
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Experimental investigation of the effects of upstream perturbations in the near-wall and core of a high porosity random-wire porous medium.
Experiments were conducted on a high-porosity porous medium to investigate the influences of upstream perturbations. The porous medium was fabricated by stacking stainless steel wire-mesh screens in a container of circular cross-section. A step change in porosity is considered a perturbation to the …
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Terahertz Methods for Investigating the Liquid Transport Characteristics in Porous Media
Liquid transport in porous media is an important phenomenon in many scientific and engineering fields. Investigating the liquid transport process is crucial for gaining a better understanding of various important industrial processes, such as the disintegration of pharmaceutical tablets as well as …
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