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摘要:
In this paper, we present a discontinuous Galerkin (DG) method for the simulation of incompressible and immiscible two-phase flow in fractured porous media with capillary pressure. The hybrid-dimensional fracture models are considered in which fractures are treated as (d - 1)-dimensional interfaces in the d-dimensional domain and fluid exchange between fractures and surrounding matrix is taken into account. The approximation schemes combining the DG method with the fully implicit backward Euler time discretization are formulated for models with a single fracture and intersecting fractures network, and the stability and unique solvability are established. Optimal error estimates in the discrete H1-norm for saturation and pressure are derived. Numerical experiments in two-dimensional geometry are conducted to verify the accuracy of our theoretical analysis. In addition to the backward Euler formulation, we also implement the algorithm with a kind of conventional IMplicit Pressure Explicit Saturation (IMPES) method. & COPY; 2023 Elsevier Inc. All rights reserved.
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来源 :
JOURNAL OF COMPUTATIONAL PHYSICS
ISSN: 0021-9991
年份: 2023
卷: 488
4 . 1 0 0
JCR@2022
ESI学科: PHYSICS;
ESI高被引阀值:17
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