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-   -   Setting a surface roughness on a wall (http://www.cfd-online.com/Forums/fluent/39463-setting-surface-roughness-wall.html)

Sandile Peta February 1, 2006 02:57

Setting a surface roughness on a wall
 
Hi,

I'm modelling a solar car in a wind tunnel in fluent and I'd like to know how I can create a surface roughness for one of the walls(ie. the bottom wall of the wind tunnel to simulate the road surface).

kharicha February 1, 2006 03:57

Re: Setting a surface roughness on a wall
 
If you use any turbulence model, you will see in the boundary condition panel a line with "wall roughness"...fill it.


Sandile Peta February 1, 2006 05:39

Solution-Solve-Initialise
 
when clicking Solution-Solve-Initialise-compute from what is the best value of compute from to select, for instance in a wind tunnel model the options are: all-zones, car, velocity inlet, wall. Which would be the best for me to select in this case?

thanks sandile

Ravi Duggirala February 1, 2006 09:14

Re: Solution-Solve-Initialise
 
hi initialize from the velocity inlet. It seems the initialization might change your result and also the convergence rate. I will try initializing the velocity inlet to inlet velocity Ravi


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