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anisotropic-porous-media
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Convective stability of carbon sequestration in anisotropic porous media
, Article Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences ; Vol. 470, Issue. 2170 , 2014 ; ISSN: 13645021 ; Morad, M. R ; Sharif University of Technology
Abstract
The stability of convection in an anisotropic porous medium, where the solute concentration is assumed to decay via a first-order chemical reaction, is studied. This is a simplified model for the interactions between carbon dioxide and brine in underground aquifers; the instability of which is essential in reducing reservoir mixing times. The key purpose of this paper is to explore the role porous media anisotropy plays in convective instabilities. It is shown that varying the ratio of horizontal to vertical solutal diffusivites does not significantly affect the behaviour of the instability. This is also the case for changes of permeability when the diffusion rate dominates the solute...
Design and Implementation of a Parallel Algorithm for FPS-MPFA Scheme to Simulate Flow in Anisotropic Porous Media
, M.Sc. Thesis Sharif University of Technology ; Taghizadeh Manzari, Mehrdad (Supervisor)
Abstract
Continuous approximation of pressure and flux fields is one of main goals of simulating flow in porous media. To compute the pressure field in heterogeneous and anisotropic media using minimum memory and time, it is necessary to use a conservative flux-continuous scheme. Nowadays, one of the most efficient approaches to minimize the solving time of large-scale problems is parallel computing. In this research, a parallel algorithm for flux-continuous multi-point flux approximation (MPFA) scheme with full pressure support (FPS) is designed and implemented on unstructured triangular grids by cell-centered approach. In this work, 2D single phase flows are investigated. The results are presented...
Modeling of Hydraulic Fracture Propagation in Porous Media by Applying a Damage Model in the Extended Finite Element Method
, M.Sc. Thesis Sharif University of Technology ; Khoei, Amir Reza (Supervisor) ; Broumand, Poyan (Co-Advisor)
Abstract
In the last decades, Hydraulic Fracturing has been found widespread applications. One of its main applications is fracture producing in hydrocarbon reservoirs and increasing the outflow of oil and gas. Thus, control and prediction of crack path is really necessary. One of the major parts in any model is an appropriate crack propagation criteria. Many criterion has been proposed in literature. These models often assume some simplifying assumptions. They often consider isotropic media. In fact, this assumption is not applicable in geo-mechanics. In other words, there are many inhomogenities such as micro-cracks and microdefects. These appear in the flow characteristics (e.g. permeability) and...
Modeling of Non-Darcy flow through anisotropic porous media: Role of pore space profiles
, Article Chemical Engineering Science ; Volume 151 , 2016 , Pages 93-104 ; 00092509 (ISSN) ; Hassani, A. H ; Ghazanfari, M. H ; Sharif University of Technology
Elsevier Ltd
Abstract
Excess pressure drop induced by inertial effects limits the applicability of Darcy's law for modeling of fluid flow through porous media at high velocities. It is expected such additional pressure drop is influenced by pore/morphology of porous media. This work concerns with fundamental understanding of how throat curvature affects intrinsic properties of porous media at non-Darcy flow conditions using network modeling. Conical, parabolic, hyperbolic, and sinusoidal capillary ducts with three types of imposed anisotropy are used to construct the network in a more realistic manner. Solutions of one dimensional Navier-Stokes equation for incompressible fluid flow through converging/diverging...