Abstract
In this study, we present an efficient coupled method for modeling fluid flow in fractured porous media. The proposed model is developed based on the coupling of the boundary element and finite element methods. The fracture network, treated as planar sinks and sources embedded in the matrix, is solved via the boundary element method and the flow within the fracture networks is unidirectional and it is solved via the finite element method. The proposed methodology is capable of generating both transient flow and steady-state flow responses which are solved in the Laplace domain. With a simple direct discretization of the fractures and boundaries, the proposed coupled model it is shown to accurately capture the flow behavior with high computational efficiency and stability compared to traditional methods. The proposed model is validated against both analytical solutions and a full-scale numerical simulation. Synthetic case studies with different fracture structures are presented to show the robustness, applicability and computational convenience of the proposed coupled approach for fractured porous media.
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