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roughness in interFoam

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Old   September 1, 2013, 02:47
Default roughness in interFoam
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sajad
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hi,
I want use Surface roughness in interFoam.Can I do it?????
I have laminar multiphase flow close to wall with Surface roughness.
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Old   May 5, 2014, 10:02
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Anastasios Stampoultzoglou
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Hello,

I have the same problem about the roughness in interFoam. Specifically, i want to put roughness to the bottom. Did you find the answer to your question? If yes, please let me know.

Regards,
Tasos.
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Old   May 5, 2014, 17:27
Question roughness in interFoam
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Anastasios Stampoultzoglou
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Hallo to everyone,

Can anyone tell me how to put roughness in interFoam to the bottom of a dam break tutorial?

Specifically, i have to solve this problem and i only know that the roughness is 2mm.

If anyone has an information which may help me, please let me know!!!

Regards
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Old   May 9, 2014, 09:18
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Eysteinn Helgason
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Quote:
Originally Posted by Tasos View Post
Hallo to everyone,

Can anyone tell me how to put roughness in interFoam to the bottom of a dam break tutorial?

Specifically, i have to solve this problem and i only know that the roughness is 2mm.

If anyone has an information which may help me, please let me know!!!

Regards
I think this might help

/Eysteinn
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Old   May 9, 2014, 15:50
Question roughness help!
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Anastasios Stampoultzoglou
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Hello all,

In order to put wall-roughness in RANS k-ε model, i put it in nut folder, instead of nutkWallFunction to the walls ,nutkRoughWallFunkion.Is that enough?Do i need to change and another boundary condition in nut folder (or to another folder) in order to put correct the roughness.
In addition, i put the roughness height at Ks.But i don't know what is the Cs coefficient.
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Old   May 10, 2014, 09:00
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Anastasios Stampoultzoglou
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Thank you very much for your reply!I have a new question about roughness up here!Do you know the answer
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Old   May 12, 2014, 05:44
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Eysteinn Helgason
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Quote:
Originally Posted by Tasos View Post
In addition, i put the roughness height at Ks.But i don't know what is the Cs coefficient.
I have not used this myself, but there is some information regarding the choice of Cs on page 28 in the paper given in post #36 in the link I posted.

/Eysteinn
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