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Numerical Heat Transfer, Part B: Fundamentals
An International Journal of Computation and Methodology
Volume 43, 2003 - Issue 3
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Original Articles

AN IMPROVED SIMPLEC METHOD ON COLLOCATED GRIDS FOR STEADY AND UNSTEADY FLOW COMPUTATIONS

Wen Zhong Shen Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark
,
Jess A. Michelsen Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark
,
Niels N. Sørensen Wind Energy Department, RISØ National Laboratory, Roskilde, Denmark
&
Jens Nørkær Sørensen Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark
Pages 221-239 | Published online: 02 Feb 2011
 
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Abstract

A modified SIMPLEC scheme for flow computations on collocated grids has been developed. It is demonstrated that the standard SIMPLEC scheme [1] is inconsistent when applied on collocated grids. Hence, for steady computations the computed solution depends on the velocity underrelaxation parameter f u , 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.

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