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Old   September 24, 2010, 22:55
Default pipe boundary
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NieYongguang
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Hello, everyone. I want to compute the flow of pipe as show in the picture below by pisoFoam, which include small inlet1 of 1.2m/s, big inlet2 of 0.5m/s and one outlet. Now I have two question. First how should I set the value of k and epsilon at wall boundary. Second what are nutilda and R in 0 file when using pisoFoam and how should I initialize them.

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Old   September 26, 2010, 06:23
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Nico T
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Hi,
I can not see any picture. However, take a look at the CFD-Wiki, the calculation of k and epsilon is explained there: http://www.cfd-online.com/Wiki/Turbu...ary_conditions

For a first try, set bc like in the piso or other ras tutorials.

Good luck,

Nico
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Old   September 27, 2010, 05:21
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Quote:
Originally Posted by deniggo View Post
Hi,
I can not see any picture. However, take a look at the CFD-Wiki, the calculation of k and epsilon is explained there: http://www.cfd-online.com/Wiki/Turbu...ary_conditions

For a first try, set bc like in the piso or other ras tutorials.

Good luck,

Nico
Thanks for your reply! Yesterday I have resolved the problem using simpleFoam with BC of fixed k and epsilon value. Then I will try to resolve the problem using other RAS solver.
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