KEpsilon and KOmega

larry · June 28, 2006, 02:53

Hello,

I am fairly new to CFD and I've just finished installing OpenFOAM on my laptop. For my research, I have to study a problem with a relatively simple geometry (two flows mixing at the entrance of a cylinder. The cylinder has a diaphragm [circular corona] generating turbulence. The Reynolds range from 13000 to 90000. The system has a cylindrical symmetry.).
I wonder: are the K-Epsilon and K-Omega models implemented in OpenFOAM? Are they any difficult to use?
Many thanks

Larry

msrinath80 · June 28, 2006, 20:48

Q) Is k-epsilon implemented?

A) http://www.opencfd.co.uk/openfoam/tu...tml#turbulence

I believe that k-omega has more or less the same structure as k-epsilon. If you are strong in C++, it would be nice if you could implement it and pass it upstream. If I remember correctly, there was a discussion about it sometime back. Search this forum using 'omega' as the keyword.

Regarding the difficulty in usage, I don't think any model is very difficult to use. For instance, you could very easily follow the lid-driven cavity tutorial and get started quickly.

rmorgans · June 28, 2006, 21:57

I'm new to OF as well, but have had a very small experience implementing the k-omega model in CFX quite a few years ago

http://www.cfd.com.au/cfd_conf99/papers/068MORG.PDF

If I can be of any assistance, please contact me.

It might be a good way to learn OF

Cheers

Rick

larry · June 29, 2006, 02:38

Alright. Thanks both of you for your advice. I have to do some reading first. I'll post again for sure later on.
Cheers

Lorenzo

June 28, 2006, 02:53	Hello, I am fairly new to C	#1
larry New Member larry Join Date: Mar 2009 Posts: 3 Rep Power: 17	Hello, I am fairly new to CFD and I've just finished installing OpenFOAM on my laptop. For my research, I have to study a problem with a relatively simple geometry (two flows mixing at the entrance of a cylinder. The cylinder has a diaphragm [circular corona] generating turbulence. The Reynolds range from 13000 to 90000. The system has a cylindrical symmetry.). I wonder: are the K-Epsilon and K-Omega models implemented in OpenFOAM? Are they any difficult to use? Many thanks Larry

June 28, 2006, 20:48	Q) Is k-epsilon implemented?	#2
msrinath80 Senior Member Srinath Madhavan (a.k.a pUl\|) Join Date: Mar 2009 Location: Edmonton, AB, Canada Posts: 703 Rep Power: 21	Q) Is k-epsilon implemented? A) http://www.opencfd.co.uk/openfoam/tu...tml#turbulence I believe that k-omega has more or less the same structure as k-epsilon. If you are strong in C++, it would be nice if you could implement it and pass it upstream. If I remember correctly, there was a discussion about it sometime back. Search this forum using 'omega' as the keyword. Regarding the difficulty in usage, I don't think any model is very difficult to use. For instance, you could very easily follow the lid-driven cavity tutorial and get started quickly.

June 28, 2006, 21:57	I'm new to OF as well, but hav	#3
rmorgans New Member Richard Morgans Join Date: Mar 2009 Posts: 16 Rep Power: 17	I'm new to OF as well, but have had a very small experience implementing the k-omega model in CFX quite a few years ago http://www.cfd.com.au/cfd_conf99/papers/068MORG.PDF If I can be of any assistance, please contact me. It might be a good way to learn OF Cheers Rick

June 29, 2006, 02:38	Alright. Thanks both of you fo	#4
larry New Member larry Join Date: Mar 2009 Posts: 3 Rep Power: 17	Alright. Thanks both of you for your advice. I have to do some reading first. I'll post again for sure later on. Cheers Lorenzo

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