[seju]

hi,
I want use Surface roughness in interFoam.Can I do it?????
I have laminar multiphase flow close to wall with Surface roughness.

[Tasos]

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.

[Tasos]

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

[eysteinn]

Originally Posted by Tasos

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

[Tasos]

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.

[Tasos]

Thank you very much for your reply!I have a new question about roughness up here!Do you know the answer

[eysteinn]

Originally Posted by Tasos

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