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-   -   Q criteria (http://www.cfd-online.com/Forums/openfoam-post-processing/97451-q-criteria.html)

nima ba February 17, 2012 07:32

Q criteria
 
Hi everyone ..with all the best for all of you :)
I'm working on coherent structure(vortices) identification on the channel flow and for this propos I'm using Q criteria and lambda2. I have got a 2 big problem
1) how should I use these criteria correctly to capture a special vortex such as hair pine vortex among the lot of vortices?
2) how should I normalized Q?
Thanks.


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