A unified stabilized method for Stokes’ and Darcy's equations
Artikel i vetenskaplig tidskrift, 2007

We use the lowest possible approximation order, piecewise linear, continuous velocities and piecewise constant pressures to compute solutions to Stokes equation and Darcy's equation, applying an edge stabilization term to avoid locking. We prove that the formulation satisfies the discrete inf-sup condition, we prove an optimal a priori error estimate for both problems. The formulation is then extended to the coupled case using a Nitsche-type weak formulation allowing for different meshes in the two subdomains. Finally, we present some numerical examples verifying the theoretical predictions and showing the flexibility of the coupled approach.

Stokes’ equation

Stabilized methods

Interior penalty method

Nitsche's method

Domain decomposition

Darcy's equation

Inf–sup condition

Finite element

Författare

Erik Burman

Ecole Polytechnique Federale de Lausanne

Peter F G Hansbo

Beräkningsteknik

Journal of Computational and Applied Mathematics

0377-0427 (ISSN)

Vol. 198 35-51

Ämneskategorier

Beräkningsmatematik

Strömningsmekanik och akustik

DOI

10.1016/j.cam.2005.11.022