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Troubleshooting Unsteady Incompressible Flow Solver

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Old   November 15, 2010, 11:55
Default Troubleshooting Unsteady Incompressible Flow Solver
Join Date: Oct 2010
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Hi There,

I have written a 2 dimensional incopressible flow solver working on a finite volume cartesian grid, using a pressure correction algorithm.

I am trying to validate, against a bench mark solution for Re 100 flow over a submerged cylinder.

I know the flow is suposed to be unsteady, however my solver seems to keep converging on a stable soltion.

The resultant drag coefitiants agree well with the bench mark figures (+or- 15%-20%), however their is a distinct lack of instability.

Can anyone sugest possible reasons for my unwanted stability?

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