This paper presents a finite element algorithm for solving quasi-static Biot poroelasticity model. By introducing a total pressure, we reformulate the Biot system into a coupled Stokes-parabolic equation. To efficiently solve it, we propose a parallel splitting approach. The coupled system is decomposed into a Stokes subproblem and a parabolic subproblem. These subproblems are then solved in parallel using a stabilization technique. This parallel splitting approach different from sequential or iterative decoupling. The algorithm is proven to be unconditionally stable and theoretical results are validated through numerical experiments.

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An Unconditionally Stable Parallel Splitting Algorithm for the Coupled Stokes-Parabolic Equation Based on the Three-Field Biot Model

  • Jijing Zhao,
  • Shuyu Sun

摘要

This paper presents a finite element algorithm for solving quasi-static Biot poroelasticity model. By introducing a total pressure, we reformulate the Biot system into a coupled Stokes-parabolic equation. To efficiently solve it, we propose a parallel splitting approach. The coupled system is decomposed into a Stokes subproblem and a parabolic subproblem. These subproblems are then solved in parallel using a stabilization technique. This parallel splitting approach different from sequential or iterative decoupling. The algorithm is proven to be unconditionally stable and theoretical results are validated through numerical experiments.