Vorticity-pressure formulations for the Brinkman-Darcy coupled problem

Author: 

Anaya, V
Mora, D
Reales, C
Ruiz-Baier, R

Publication Date: 

March 2019

Journal: 

NUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS

Last Updated: 

2019-04-26T18:37:41.807+01:00

Issue: 

2

Volume: 

35

DOI: 

10.1002/num.22312

page: 

528-544

abstract: 

© 2018 Wiley Periodicals, Inc. We introduce a new variational formulation for the Brinkman-Darcy equations formulated in terms of the scaled Brinkman vorticity and the global pressure. The velocities in each subdomain are fully decoupled through the momentum equations, and can be later recovered from the principal unknowns. A new finite element method is also proposed, consisting in equal-order Nédélec and piecewise continuous elements, for vorticity and pressure, respectively. The error analysis for the scheme is carried out in the natural norms, with bounds independent of the fluid viscosity. An adequate modification of the formulation and analysis permits us to specify the presentation to the case of axisymmetric configurations. We provide a set of numerical examples illustrating the robustness, accuracy, and efficiency of the proposed discretization.

Symplectic id: 

894245

Download URL: 

Submitted to ORA: 

Submitted

Publication Type: 

Journal Article