Hi everyone,
I'm studying the flow behind a bluff body and I have done a large eddy simulation in ANSYS-FLUENT 17.0. Now I would like to show the shedding vortices behind the bluff body in CFD-post; but I can't find vorticity in the list of parameters to plot the vorticity contour. Does anyone have idea?
Thank you,
Ali
Qcriterion or lambda criterion are standard options in cfd post. Im my opinion it is the best tool for visualization of vortex cores. I use it for visualization of different scale vortices in cyclones. It is flexible and very easy to use.
you can insert a plane in the position you interest and then insert vector in that plane, this will help you to see the velocity vector and if you interest about the vorticity you can export it from FLeunt and select it instead of vector
VELOCITY CURL IS OFTEN USED TO SEE VORTEX SHEDDING. WE HAVE TO CHOOSE THE COMPONENT WHICH IS NORMAL TO PLANE OF INTEREST. IF WE ARE VISULAIZING 2D FLOW AROUND A CYLINDER IN XY PLANE THEN VELOCITY CURL Z COMPONENT SHOULD BE USED IN CONTOUR PLOT.
voriticity and vorticiy contours (iso-surfaces) are a standard option in Fluent Post. In my opinion for visualisation of vorticity nature of flow beter and more useful is Q-crirerion (or lambda criterion). It is standard option in CFD Post (no Fluent Post) very easy to use. Interesting for visualisation of some structure of vortices is also helicity. Best regards Rysiek
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