Explanation for terms like RAS turbulence, kEpsilon,...

tH3f0rC3 · March 15, 2011, 06:36

Hi there,

I want to understand the meaning of those terms used from OpenFoam like for example RAS turbulence.
The following is written in the userguide:
RASModel
uses Reynolds-averaged stress (RAS) modelling; But what does that mean? Does someone know where I can find the explanation to that?
under this link there is a list, but also no explanation of what is ment with for example: kEpsilon
Standard high-

model

In the RASproperties there are lises many keywords like kEpsilonCoeffs. Where can I find their meaning?

Regards,
tH3f0rC3

vatavuk · March 16, 2011, 07:10

Hi,
You are asking basic questions about turbulence models. Look up in search sites and you will find a lot of information about this.

tH3f0rC3 · March 16, 2011, 10:16

Quote:

Originally Posted by vatavuk

Hi,
You are asking basic questions about turbulence models. Look up in search sites and you will find a lot of information about this.

Aaaaaaah, OK.
Thank you. I thought this would be names created for turbulencemodels from the one who programmed this files.
But these files are named to their scientific background.

Thank you!

Regards,
tH3f0rC3

March 15, 2011, 06:36	Explanation for terms like RAS turbulence, kEpsilon,...	#1
tH3f0rC3 Senior Member Join Date: Mar 2011 Posts: 158 Rep Power: 15	Hi there, I want to understand the meaning of those terms used from OpenFoam like for example RAS turbulence. The following is written in the userguide: RASModel uses Reynolds-averaged stress (RAS) modelling; But what does that mean? Does someone know where I can find the explanation to that? under this link there is a list, but also no explanation of what is ment with for example: kEpsilon Standard high- model In the RASproperties there are lises many keywords like kEpsilonCoeffs. Where can I find their meaning? Regards, tH3f0rC3

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March 16, 2011, 07:10		#2
vatavuk Senior Member Paulo Vatavuk Join Date: Mar 2009 Location: Campinas, Brasil Posts: 200 Rep Power: 18	Hi, You are asking basic questions about turbulence models. Look up in search sites and you will find a lot of information about this.