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-   -   How to define the wall roughness in FLOW-3D ? (http://www.cfd-online.com/Forums/flow-3d/27310-how-define-wall-roughness-flow-3d.html)

Marco December 19, 2008 04:31

How to define the wall roughness in FLOW-3D ?
 
I'm researching about open channel flow, and the roughness is an important role in open channel. But I don't find where can I set the roughness in FLOW-3D. May Someone help me to solve the problem ?

Thanks a lot.

Armen A. Ghirghidov December 19, 2008 09:43

Re: How to define the wall roughness in FLOW-3D ?
 
You may use rough(1)=0.001 (roughness in meters) for example in $obs part of the prepin.inp or use Geometry->component->surface properties->surface roughness and remember that roughness in meters (if you use si system of course). FLOW-3D help has full information about this.

Regards, Armen

AMP December 19, 2008 16:15

Re: How to define the wall roughness in FLOW-3D ?
 
It is very easy, F3D get these datas where you define a new obstacle with special material properties in geometry menu.

Marco December 20, 2008 02:26

Re: How to define the wall roughness in FLOW-3D ?
 
Very grateful everyone. I'll try again, thanks.


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