Roughness vs NoSlip in walls

adrianaday · October 23, 2023, 17:06

Hi,

I'm trying to understand how the NoSlip condition allows the program to read roughness, in this case, I'm assuming it reads roughness from the nut folder.

Are my assumptions correct? if not how do these two parameters relate to one another?
How does 0 velocity at wall translate to "there is some roughness here"

esma · October 23, 2023, 19:12

I think if you need to assign roughness to your wall boundaries you'd need to use nutkRoughWallFunction assign to the walls in the nut file

checkout this if that's what you need

https://www.openfoam.com/documentati...lFunction.html

https://develop.openfoam.com/Develop...lMoving/0.orig

October 23, 2023, 17:06	Roughness vs NoSlip in walls	#1
adrianaday New Member Default Join Date: Oct 2023 Posts: 1 Rep Power: 0	Hi, I'm trying to understand how the NoSlip condition allows the program to read roughness, in this case, I'm assuming it reads roughness from the nut folder. Are my assumptions correct? if not how do these two parameters relate to one another? How does 0 velocity at wall translate to "there is some roughness here"

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October 23, 2023, 19:12		#2
esma Member Join Date: May 2016 Posts: 40 Rep Power: 10	I think if you need to assign roughness to your wall boundaries you'd need to use nutkRoughWallFunction assign to the walls in the nut file checkout this if that's what you need https://www.openfoam.com/documentati...lFunction.html https://develop.openfoam.com/Develop...lMoving/0.orig