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Robust Globally Divergence-Free Weak Galerkin Methods for Stationary Incompressible Convective Brinkman-Forchheimer Equations
Xiaojuan Wang and Xiaoping Xie

Numer. Math. Theor. Meth. Appl. DOI: 10.4208/nmtma.OA-2024-0007

Publication Date : 2024-09-23

  • Abstract

This paper develops a class of robust weak Galerkin methods for stationary incompressible convective Brinkman-Forchheimer equations. The methods adopt piecewise polynomials of degrees $m (m ≥ 1)$ and $m − 1$ respectively for the approximations of velocity and pressure variables inside the elements and piecewise polynomials of degrees $k$ ($k = m − 1$,$m$), and $m$ respectively for their numerical traces on the interfaces of elements, and are shown to yield globally divergence-free velocity approximation. Existence and uniqueness results for the discrete schemes, as well as optimal a priori error estimates, are established. A convergent linearized iterative algorithm is also presented. Numerical experiments are provided to verify the performance of the proposed methods.

  • Copyright

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