An improved SIMPLEC method on collocated grids for steady and unsteady flow computations

A modified SIMPLEC scheme for flow computations on collocated grids has been developed. It is demonstrated that the standard SIMPLEC scheme is inconsistent when applied on collocated grids. Hence, for steady computations the computed solution depends on the velocity underrelaxation parameter *au, wh...

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Bibliographic Details
Published in:Numerical heat transfer. Part B, Fundamentals Fundamentals, 2003-03, Vol.43 (3), p.221-239
Main Authors: Shen, W Zh, Michelsen, J A, Sorensen, N N, Sorensen, J N
Format: Article
Language:English
Online Access:Get full text
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Summary:A modified SIMPLEC scheme for flow computations on collocated grids has been developed. It is demonstrated that the standard SIMPLEC scheme is inconsistent when applied on collocated grids. Hence, for steady computations the computed solution depends on the velocity underrelaxation parameter *au, whereas the solutions of unsteady computations for small time steps are polluted by unphysical wiggles. A revised scheme is proposed that extends the capability of the SIMPLEC method to cope with collocated grids in a general and consistent way. The efficiency of the new scheme is demonstrated by computing flows past a circular cylinder and an airfoil.
ISSN:1040-7790
DOI:10.1080/10407790390122096