Implementation of slip boundary conditions in the finite volume method: new techniques
Article first published online: 26 DEC 2012
Copyright © 2012 John Wiley & Sons, Ltd.
International Journal for Numerical Methods in Fluids
Volume 72, Issue 7, pages 724–747, 10 July 2013
How to Cite
Ferrás, L.L., Nóbrega, J.M. and Pinho, F.T. (2013), Implementation of slip boundary conditions in the finite volume method: new techniques. Int. J. Numer. Meth. Fluids, 72: 724–747. doi: 10.1002/fld.3765
- Issue published online: 3 JUN 2013
- Article first published online: 26 DEC 2012
- Manuscript Accepted: 18 NOV 2012
- Manuscript Revised: 8 OCT 2012
- Manuscript Received: 25 JAN 2012
- slip boundary condition;
- finite volume method;
- implicit method
Two different techniques for the implementation of the linear and nonlinear slip boundary conditions into a finite volume method based numerical code are presented. For the linear Navier slip boundary condition, an implicit implementation in the system of equations is carried out for which there is no need for any relaxation, especially when handling high slip coefficients. For three different nonlinear slip boundary conditions, two different methods are devised, one based on solving a transcendental equation for the boundary and the other on the linearization of the slip law. For assessment purposes, comparison is made between these new methods and the usual iterative process. With these new methods, the convergence difficulties, typical of the iterative procedure, are eliminated, and for some of the test cases, the convergence rate even increased with the slip velocity. The details of these implementations are given first for a simple geometry using orthogonal meshes and Cartesian coordinates followed by their generalization to non-Cartesian coordinates and nonorthogonal meshes. The developed code was tested in the benchmark slip-stick and 4:1 contraction flows, evidencing the robustness of the proposed procedures. Copyright © 2013 John Wiley & Sons, Ltd.