Searched for: subject:"Porous%5C+Media"
(1 - 20 of 26)

Pages

document
de Geus, Julia (author)
A CFD study is made to get more insight in the flow, temperature and heat distribution in a side heated cavity filled with coarse grained porous media. This was investigated for 105≤Ra≤107 and 0.01≤Ri≤100. The question is how the solid beads influence the heat transfer. It was found that the spheres dampen the flow, influence the local heat...
master thesis 2018
document
de Zeeuw, Wessel (author)
Even though negative effects on the use of crude oil have surfaced over the past years, our energy matrix still largely relies on this energy source. The production of oil, therefore, plays an important role in our society. Unfortunately, the process of oil production is highly uncertain. There are uncertainties associated on the production...
master thesis 2018
document
Sokolova, Irina (author)
We propose a multiscale finite volume method (MSFV) for simulation of coupled flow-deformation in heterogeneous porous media under elastic deformation (i.e., poroelastic model). The fine-scale fully resolved system of equations is obtained based on a conservative finite-volume method in which the displacement and pore pressure unknowns are...
master thesis 2018
document
Morito Mansur, Gabriella (author)
Coupling between porous media and free flow is widely present in many applications. In fractured reservoirs, fractures are often treated as parallel (smooth) plates, between which the flow is assumed to be steady state fully developed, with no-slip boundary condition. Under these assumptions, the Darcy law is employed inside fractures with...
master thesis 2018
document
Murtaza, Ali (author)
Water injection is a core element of geothermal, petroleum and waste water management industries where water is injected into the subsurface after treatment and filtration to comply with environmental regulations and water quality requirements. Some impurities still remain in the water even after the filtration process. It has been widely...
master thesis 2017
document
Boitcov, Dmitrii (author)
Existing multiscale solvers use a sequence of aggressive restriction, coarse-grid correction and prolongation operators to handle low-frequency modes on the coarse grid. High-frequency errors are resolved by employing a smoother on the fine grid. Deflation preconditioning improves matrix properties, i.e., damps slowly varying errors,...
master thesis 2017
document
Praditia, Timothy (author)
Modern geoscience challenges motivate the development of advanced simulation methods for large-scale geothermal fields, where single- or multi-phase flow is coupled with heat transfer equation in heterogeneous fractured formations. The state-of-the-art multiscale formulation for fractured media (F-AMS; Tene et al., JCP, 2016) develops an...
master thesis 2017
document
Postma, T.J.W. (author)
Over the past decade, a steep increase in the number of seismic events has been observed in the Groningen gas producing region of the Northern Netherlands. It is generally accepted that these are induced by compaction of the reservoir rock due to extensive field depletion, causing a buildup of strain energy which may be released seismically when...
master thesis 2017
document
Bosma, S.B.M. (author)
A novel multiscale method for discrete fracture modeling on unstructured grids (MS-DFM) is developed. To this end, the DFM fine-scale discrete system is constructed using unstructured conforming cells for the matrix with lower-dimensional fracture elements placed at their interfaces. On this unstructured fine grid, MS-DFM imposes independent...
master thesis 2017
document
Markensteijn, A.S. (author)
Reservoir simulation is a widely used means for prediction and optimization of oil recovery from a reservoir and it is based on the multiphase porous media flow model. For one dimensional, incompressible, immiscible three-phase flow in a homogeneous medium without gravity and capillary pressure, loss of strict hyperbolicity can occur for certain...
master thesis 2016
document
Kaltsas, D. (author)
The pressuremeter test is one of the most popular in-situ soil testing methods. Developed in the 1950s in France, the test has evolved throughout the past decades and was built into a cone resulting in a cone pressuremeter device (CPM). A proposed extension of the test involves time dependent pressurisation of the device resulting in wave...
master thesis 2016
document
Laskaris, G. (author)
Foams find many applications in the oil industry with their uses ranging from fracturing stimulation treatments to enhanced oil recovery processes. Many of these applications concern the reduction of injected gas mobility which can be induced by a strong foam. However, foam behavior inside a porous medium is complex and a fully predictive model...
master thesis 2015
document
Kardale, M. (author)
In this work, the non-linear behaviour of saturation transport equations in sequential implicit simulation strategy for multi-phase, immiscible and incompressible displacements are investigated. In reservoir simulation, use of explicit time schemes can lead to severe time-step size restrictions, specially when strong nonlinear terms exist. For...
master thesis 2015
document
Shah, S.Y. (author)
This thesis proposes a novel multiscale method for simulating fluid flow in fractured porous media. Broadly speaking, this pertains to oil, gas and geothermal energy reservoirs.
master thesis 2015
document
Van der Neut, E.M. (author)
When designing a rubble mound breakwater, one would like to predict the stability of the armour layer of the breakwater. For this purpose several armour layer stability formula are developed. The most reliable is considered to be the stability formula of Van der Meer (1988). With this method, the armour layer stability is predicted based on...
master thesis 2015
document
Blokker, N.C.M. (author)
Alginate-like exopolysaccharides (ALE) can be extracted from granular sludge, which is produced during aerobic granular sludge waste water treatment as a waste product. Processing the waste is a costly operation. It is believed that ALE consist mostly of alginates. The chemical and mechanical properties of alginates are potential for the...
master thesis 2014
document
Bent van der, V.J. (author)
The oil recovery from a reservoir can be enhanced by gas injection. Creating a foam with the injected gas can improve the sweep efficiency. For an efficient foam displacement process the foam films must remain stable in the presence of oil. Unfortunately, most foams are destabilised by oil. It is therefore important to select an foaming agent...
master thesis 2014
document
Van der Linden, J.H. (author)
Extreme and isolated eigenvalues are known to be harmful to the convergence of the iterative solver. These eigenvalues are produced by strong heterogeneity in the underlying physics. We can improve the quality of the spectrum by ‘deflating’ the harmful eigenvalues. In this thesis, deflation is applied to linear systems in reservoir simulation....
master thesis 2013
document
Janmahomed, F.R. (author)
The Stochastic Bubble Population (SBP) model invented in 2006 by Prof. Dr. Zitha has been improved to take in account for the oil presence in the porous medium through which foam flows. The assumptions of the SBP model are that foam flow in porous media is a complex fluid and bubble generation is a stochastic process. The SBP model is a simple...
bachelor thesis 2013
document
Dharma, A.S. (author)
In gas-injection enhanced oil recovery (EOR), foam is a promising method to improve sweep. We studied foam for EOR through analytical modeling and simulations in two cases: the ability of foam to prevent gravity override over large distances and the effect of oil on foam processes. Shan and Rossen (2004) present a simple model for SAG ...
master thesis 2013
Searched for: subject:"Porous%5C+Media"
(1 - 20 of 26)

Pages