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-   -   Coefficienct in the oodles (http://www.cfd-online.com/Forums/openfoam-solving/57794-coefficienct-oodles.html)

loneboard February 12, 2009 06:31

Now I start to try to use oodl
 
Now I start to try to use oodles to solve the flow in a constricted tube.

But in fact, I don't know the meaning of the coefficients in the folder of 0. what is the meaning of B,nuSgs, nuTilda? who would like to tell me?

I also don't know the meaning of the coefficients in the file of LESProperties?

Who could tell me how I could know it?

su_junwei February 12, 2009 18:53

Hi Xiaoguang B is sub-g
 
Hi Xiaoguang

B is sub-grid stress tensor
nuSgs is sub-grid viscosity
NuTilda is kinematic turbulent viscosity

The coefficients are model-dependent

See the model implementation of sgs model in

/home/sujunwei/OpenFOAM/OpenFOAM-1.5.x/src/turbulenceModels/LES/incompressible/

Su Junwei

loneboard February 13, 2009 03:58

Thanks for your response. I wi
 
Thanks for your response. I will check it.

loneboard February 13, 2009 04:29

Thanks for your response. I wi
 
Thanks for your response. I will check it. In addition, for the treatment of flow near the wall, do I need to handle it additionally? Does it include in the sgs model?

lakeat March 12, 2009 22:18

It depends. Try to start from
 
It depends. Try to start from channelOodles, pay attention to LESproperties file, there near wall treatment is specfied.

Anyway, it is also model-dependent. http://www.cfd-online.com/OpenFOAM_D...part/happy.gif


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