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Forum: OpenFOAM Running, Solving & CFD November 1, 2014, 21:01
Replies: 21
Views: 3,928
Posted By huangxianbei
Hi, I make a further calculation and find that...

Hi, I make a further calculation and find that the two ways reach the same result. Maybe there is something wrong in my previous case.

wallShearStressLES -2.99E-006
wallGradU ...
Forum: OpenFOAM Running, Solving & CFD October 28, 2014, 19:48
Replies: 21
Views: 3,928
Posted By huangxianbei
Hi,Aylaisa: Sorry,that's actually not a LES...

Hi,Aylaisa:
Sorry,that's actually not a LES case, but a case without turbulence model, say "under-resolved DNS" or something else.
According to your discription, it may be right to compute...
Forum: OpenFOAM Running, Solving & CFD October 28, 2014, 04:52
Replies: 21
Views: 3,928
Posted By huangxianbei
Hi,Aylalisa: Thank you for your...

Hi,Aylalisa:
Thank you for your explaination. I'm a little confused about the Reff and Beff, is there any difference between them?

Xianbei
Forum: OpenFOAM Running, Solving & CFD October 27, 2014, 20:04
Replies: 21
Views: 3,928
Posted By huangxianbei
Hi,Aylalisa: Why it seems that Reff can be...

Hi,Aylalisa:
Why it seems that Reff can be used to calculate the LES case? As you wrote in the thread, you use Reff. Isn't it a RANS variant instead of LES? The latter 2 results are close...
Forum: OpenFOAM Running, Solving & CFD October 24, 2014, 05:22
Replies: 21
Views: 3,928
Posted By huangxianbei
Hi, I use the wallShearStressLES...

Hi,
I use the wallShearStressLES http://www.cfd-online.com/Forums/openfoam-post-processing/103304-calculate-wall-shear-stress-of210-les-simulation-2.html

You can see from the code that it's...
Forum: OpenFOAM Running, Solving & CFD October 22, 2014, 08:32
Replies: 21
Views: 3,928
Posted By huangxianbei
Hi,Aylalisa: If the fluid is...

Hi,Aylalisa:
If the fluid is incompressible, tau_wall should divide rho to get the right value. However, in my case, I compared the results with experiment's, the way that tau_wall=rho*nu*gradU...
Forum: OpenFOAM Running, Solving & CFD October 19, 2014, 08:29
Replies: 21
Views: 3,928
Posted By huangxianbei
Hi, if a turbulence model is used, the profile...

Hi, if a turbulence model is used, the profile may goes upon the analytical profile. I did a similar case with LES before and got similar results as yours. If no turbulence model is used ,then they...
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