An Upwind Mixed Finite Element Method on Changing Meshes for Positive Semi-Definite Oil-Water Displacement of Darcy-Forchheimer Flow in Porous Media
Year: 2020
Author: Yirang Yuan, Huailing Song, Changfeng Li, Tongjun Sun
Advances in Applied Mathematics and Mechanics, Vol. 12 (2020), Iss. 5 : pp. 1196–1223
Abstract
An upwind mixed finite element method is proposed on changing meshes for solving a positive semi-definite miscible displacement problem of Darcy-Forchheimer flow in three-dimensional porous media. The pressure and velocity could be obtained together by using a mixed finite element, and the computational accuracy of velocity is improved. The concentration equation is solved by the upwind mixed finite element scheme on changing meshes, where the upwind approximation and an expanded mixed finite element are adopted for the convection and diffusion, respectively. It solves the convection-dominated diffusion problem well and has the following improvements. First, the conservation of mass, an important physical nature, is preserved. Second, it has high order computational accuracy. An optimal-order error estimates is concluded. Numerical experiments illustrate the efficiency and application of the presented scheme.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/aamm.OA-2019-0256
Advances in Applied Mathematics and Mechanics, Vol. 12 (2020), Iss. 5 : pp. 1196–1223
Published online: 2020-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 28
Keywords: Darcy-Forchheimer flow positive semi-definite problem adaptive changing meshes upwind mixed finite element method convergence analysis.
Author Details
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