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Parallel Finite Element Algorithms Based on Two-grid Discretizations for the Steady Navier-Stokes Equations with Damping Term
Guoliang WANG, Bo ZHENG, Yueqiang SHANG
Chinese Journal of Computational Physics    2023, 40 (5): 535-547.   DOI: 10.19596/j.cnki.1001-246x.8646
Abstract212)   HTML9)    PDF (10112KB)(783)      

Based on two-grid discretizations and domain decomposition techniques, this paper presents three parallel finite element algorithms for numerically solving the steady Navier-Stokes equations with damping term. The basic idea of the present algorithms is to first solve a fully nonlinear problem on a coarse grid to get a coarse grid solution, then solve Stokes, Oseen, and Newton linearized residual problems in parallel in overlapping local fine grid subdomains, and finally update the approximate solution in non-overlapping fine grid subdomains. The effectiveness of the proposed algorithms is demonstrated by some numerical examples.

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