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Old   April 7, 2009, 01:39
Default Wall roughness
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Nestor Rueda
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Hello
I知 simulating a mine tunnel where the walls are very rough (0.55 m rough in a 6 m Dia. tunnel). In CFX I just set up wall roughness under the K-epsilon model in the wall boundary condition. However I want to run a comparison in Openfoam but I don稚 know how to setup such a roughness? I知 using simpleFoam for this simulation.
Any help?
Thanks, Nestor
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Old   April 7, 2009, 05:30
Default Wall Roughness
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Hi Nestor,

I think this link can help you: http://openfoamwiki.net/index.php/Ho...eWallRoughness

In this case the roughness would be constant for every wall. If you wanted to have a different roughness for each wall I think you should add the roughness as a boundary condition.
I hope it is helpful,
Xabi

Quote:
Originally Posted by ruedavallejo View Post
Hello
I知 simulating a mine tunnel where the walls are very rough (0.55 m rough in a 6 m Dia. tunnel). In CFX I just set up wall roughness under the K-epsilon model in the wall boundary condition. However I want to run a comparison in Openfoam but I don稚 know how to setup such a roughness? I知 using simpleFoam for this simulation.
Any help?
Thanks, Nestor
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Old   April 17, 2009, 00:10
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Nestor Rueda
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Hi Xabi
Thanks for your answer. I have another question: how can I set up the wall roughness as a boundary condition?
Regards.
Nestor

Last edited by ruedavallejo; April 17, 2009 at 00:27. Reason: Adition of comment
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