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Search took 0.00 seconds. Search: Posts Made By: Bernhard
Forum: OpenFOAM August 27, 2012, 05:26
Replies: 33
Views: 4,998
Posted By Bernhard
Computational resources often dictate what kind...

Computational resources often dictate what kind of treating turbulence you use. It also depends on what you want to know. I don't advise against Large Eddy Simulations, but you have to realize that...
Forum: OpenFOAM August 27, 2012, 04:45
Replies: 33
Views: 4,998
Posted By Bernhard
Niaz is referring to the Kolmogorov scales:...

Niaz is referring to the Kolmogorov scales: http://en.wikipedia.org/wiki/Kolmogorov_microscales
It your mesh is as fine as the smallest scales in the flow, there is no need for modelling the...
Forum: OpenFOAM August 24, 2012, 10:24
Replies: 33
Views: 4,998
Posted By Bernhard
Transient RANS, I think in general they refer to...

Transient RANS, I think in general they refer to the same thing. However, long ago I have seen a paper with a triple decomposition with a third, periodic term.
Forum: OpenFOAM August 24, 2012, 10:19
Replies: 33
Views: 4,998
Posted By Bernhard
Maybe T-RANS?

Maybe T-RANS?
Forum: OpenFOAM August 24, 2012, 09:37
Replies: 33
Views: 4,998
Posted By Bernhard
Then you need to switch to RANS (which for your...

Then you need to switch to RANS (which for your case is also quite heavy), or make a compromise for the quality of your LES simulation. In any case you need to perform the calculation on a huge...
Forum: OpenFOAM August 24, 2012, 06:59
Replies: 33
Views: 4,998
Posted By Bernhard
This is not a simple case. Yes, the formulation...

This is not a simple case. Yes, the formulation is simple, but that is about it.
But you can run this code on multiple processors. Also, you can initialize the fine mesh with the results from the...
Forum: OpenFOAM August 21, 2012, 04:10
Replies: 33
Views: 4,998
Posted By Bernhard
With respect to your last question, I would like...

With respect to your last question, I would like to refer you to section 4.2.3 in Eugene de Villiers thesis http://foamcfd.org/resources/theses.html
Forum: OpenFOAM August 21, 2012, 03:06
Replies: 33
Views: 4,998
Posted By Bernhard
What are your boundary conditions on the far...

What are your boundary conditions on the far sides? You also did not mention what solver you are using?

I am quite sure the inlet section is too short. If you really apply a uniform inlet...
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