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Bylund November 19, 2011 21:24

icoFoam crash with unreasonable velocity.
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A question from an inexperienced OpenFOAM user.

I am playing around with a simple manifold design and icoFoam.

After 10 time steps everything looks more or less ok, but then suddenly the velocity increases to unreasonable values. :confused:

I increased the resolution of the mesh with unchanged results.

I have this problem generally with icoFoam that U increases until icoFoam crashes with a floating point error.

I understand I am doing something wrong, so if someone could point me in the right direction I would appreciate it.

Thank you.

Bylund November 20, 2011 19:38

I think I found the reason for this problem.

After decreasing deltaT from 0.1 to 0.005 it seems to work good.

Could be useful for anyone else who stumbles upon this problem.

alberto November 20, 2011 21:48

Hint: Check that the Courant number is < 1. If you need large time-steps, use pimpleFoam.

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