WIAS Preprint No. 1521, (2010)

A numerical method for mass conservative coupling between fluid flow and solute transport



Authors

  • Fuhrmann, Jürgen
    ORCID: 0000-0003-4432-2434
  • Langmach, Hartmut
  • Linke, Alexander
    ORCID: 0000-0002-0165-2698

2010 Mathematics Subject Classification

  • 76V05 76D05 65N08 65N30

2008 Physics and Astronomy Classification Scheme

  • 47.10.ad 47.11.Fg 47.11.Hj 82.20.Wt

Keywords

  • Incompressible Navier-Stokes Equations, Convection-Diffusion Equation, Finite Element Method, Finite Volume Method, Electrochemical Flow Cell, Limiting Current

Abstract

We present a new coupled discretization approach for species transport in an incompressible fluid. The Navier-Stokes equations for the flow are discretized by the divergence-free Scott-Vogelius element on barycentrically refined meshes guaranteeing LBB stability. The convection-diffusion equation for species transport is discretized by the Voronoi finite volume method. In accordance to the continuous setting, due to the exact integration of the normal component of the flow through the Voronoi surfaces, the species concentration fulfills discrete global and local maximum principles. Besides of the the numerical scheme itself, we present important aspects of its implementation. Further, for the case of homogeneous Dirichlet boundary conditions, we give a convergence proof for the coupled scheme. We report results of the application of the scheme to the interpretation of limiting current measurements in an electrochemical flow cell with cylindrical shape.

Appeared in

  • Appl. Numer. Math., 61 (2011) pp. 530--553.

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