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-   -   Corrugated pipe, accelerated flow (http://www.cfd-online.com/Forums/openfoam-solving/84518-corrugated-pipe-accelerated-flow.html)

kjetil February 1, 2011 10:55

Corrugated pipe, accelerated flow
 
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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.

Thanks.


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