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Corrugated pipe, accelerated flow

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Old   February 1, 2011, 10:55
Default Corrugated pipe, accelerated flow
Join Date: Mar 2009
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Dear foam folks,

I have created a wedge geometry for a corrugated pipe - and experience severe issues using simpleFoam when the corrugated section is long, say 20 diametres. As can be seen from attached screenshot, the velocity is "too high" at outlet - here 0.5m/s, while boundary at inlet is mere 0.1m/s. I have tried to keep BC's somewhat similar to pitzDaily. What may cause these problems? I have already tried to make mesh coarser, upwind and linearUpwind in fvSchemes, and ramp up relaxation parameters from ~0.2.

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accelerated, outlet, simplefoam, velocity

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