Volume 56, Number 2, March-April 2022
|Page(s)||727 - 742|
|Published online||13 April 2022|
Analysis of the Stokes–Darcy problem with generalised interface conditions
Institute of Applied Analysis and Numerical Simulation, University of Stuttgart, Stuttgart, Germany
2 Department of Mathematical Sciences, Loughborough University, Loughborough, UK
* Corresponding author: firstname.lastname@example.org
Accepted: 2 March 2022
Fluid flows in coupled systems consisting of a free-flow region and the adjacent porous medium appear in a variety of environmental settings and industrial applications. In many applications, fluid flow is non-parallel to the fluid–porous interface that requires a generalisation of the Beavers–Joseph coupling condition typically used for the Stokes–Darcy problem. Generalised coupling conditions valid for arbitrary flow directions to the interface are recently derived using the theory of homogenisation and boundary layers. The aim of this work is the mathematical analysis of the Stokes–Darcy problem with these generalised interface conditions. We prove the existence and uniqueness of the weak solution of the coupled problem. The well-posedness is guaranteed under a suitable relationship between the permeability and the boundary layer constants containing geometrical information about the porous medium and the interface. We study the validity of the obtained results for realistic problems numerically and provide a benchmark for numerical solution of the Stokes–Darcy problem with generalised interface conditions.
Mathematics Subject Classification: 35Q35 / 65N08 / 76D03 / 76D07 / 76S05
Key words: Stokes equations / Darcy’s law / interface conditions / well-posedness
© The authors. Published by EDP Sciences, SMAI 2022
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