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Problems with increasing velocity with the time

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Old   April 8, 2011, 04:58
Default Problems with increasing velocity with the time
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Hi,

I think I have two problems with divergence.
One of them is that the solver crashed after a few time steps, but I don't want to discuss this one here. :-)

The other problem ist, that the solver solves the case, but the results are not very good.
I'm solving with chtMultiRegionSimpleFoam an switched turbulence on. Now I want to see how velocity is solved.

By setting the endTime to 100 there is a maximum velocity of about 30m/s.
By setting the endTime to 500 there is a maximum velocity of about 200m/s.

I have two inlets and two outlets. Inlet is set up with fixed value of u and outlet as zeroGradient.

Please note the files added to this post.

Maybe someone knows how to solve this problem.

Best Regards,
tH3f0rC3
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