Bed roughness

cojua8 · November 20, 2017, 16:38

Hello,

I am working on bed load transport and I need to make a rough fllor by adding particles stuck to it (or something similar)
I already have the kinematicCloudProperties with the moving particles in it.

how can I achieve this?

Taataa · November 22, 2017, 18:20

In OF you can consider roughness through a boundary condition for nut. There are two:
nutURoughWallFunction
nutkRoughWallFunction

cojua8 · November 24, 2017, 14:52

but doest that roughness affect the saltation of the particles that hit the bed, or it works only for the fluid?

Taataa · November 24, 2017, 16:40

I am not sure, but I think it depends on the type of fluid particle interaction that the model solves, whether it's one way or two coupling.

November 20, 2017, 16:38	Bed roughness	#1
cojua8 Member Joaquín Neira Join Date: Oct 2017 Posts: 38 Rep Power: 9	Hello, I am working on bed load transport and I need to make a rough fllor by adding particles stuck to it (or something similar) I already have the kinematicCloudProperties with the moving particles in it. how can I achieve this?

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November 22, 2017, 18:20		#2
Taataa Senior Member Taher Chegini Join Date: Nov 2014 Location: Houston, Texas Posts: 125 Rep Power: 13	In OF you can consider roughness through a boundary condition for nut. There are two: nutURoughWallFunction nutkRoughWallFunction

November 24, 2017, 14:52		#3
cojua8 Member Joaquín Neira Join Date: Oct 2017 Posts: 38 Rep Power: 9	but doest that roughness affect the saltation of the particles that hit the bed, or it works only for the fluid?

November 24, 2017, 16:40		#4
Taataa Senior Member Taher Chegini Join Date: Nov 2014 Location: Houston, Texas Posts: 125 Rep Power: 13	I am not sure, but I think it depends on the type of fluid particle interaction that the model solves, whether it's one way or two coupling.