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Velocity spikes at interfase (interFoam)

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Old   October 27, 2009, 14:27
Default Velocity spikes at interfase (interFoam)
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Santiago Marquez Damian
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Hello all, I'm running interFoam under a OpenFoam-1.5 distro. Actually I'm facing problems described by Henry in #27 (http://www.cfd-online.com/Forums/ope...-solver-6.html)

Quote:
Look carfully at where the velocity is causing the maximum Courant number and why. I guess there is some level of numerical instability causing spikes in the velocity field which need to be delt with. Are these spikes at boundaries? near the interface? near corners? Are they reduced or removed by using upwind? Also how good is the mesh? Try running checkMesh on it if you are unsure about the quality
namely velocity spikes, they are near the boundaries and persists even using upwind schemes for U and gamma, by the way mesh quality is excellent. Ratio between Co_max and Co_mean is 250, in a quasi uniform mesh, it implies near a ratio of 250 in velocities too.
This spikes causes spurious deformations in the free surface that ought to be sinusoidal (is a mass pendulum, sloshing problem).

Any clues in solving?, I've been working in this for several weeks, without success...

Thanks in advance.
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