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 fu, 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 th 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.
|Journal||Numerical Heat Transfer Part B: Fundamentals|
|Publication status||Published - 2003|