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Forum: OpenFOAM Running, Solving & CFD

June 19, 2010, 21:42

Replies: 17

non zero divergence for incompressible flow!

Views: 5,924

Posted By rieuk

Thanks Patricio, I forgot about the way it's...

Thanks Patricio, I forgot about the way it's calculating div in the discrete space.

Forum: OpenFOAM Running, Solving & CFD

June 18, 2010, 23:00

Replies: 17

non zero divergence for incompressible flow!

Views: 5,924

Posted By rieuk

But U_f and U should the same velocity...

But U_f and U should the same velocity distributions (or almost since U_f is just the interpolated U at cell surfaces) so why should the divergence be different for each of them?

Forum: OpenFOAM Running, Solving & CFD

June 18, 2010, 08:06

Replies: 17

non zero divergence for incompressible flow!

Views: 5,924

Posted By rieuk

Hey Pascal, Have you checked for...

Hey Pascal,

Have you checked for convergence at each time-step (like looking at the initial residuals)? Maybe you need to increase your nCorr (number of PISO corrector steps)? Just guessing...

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