Vorticity

az_f · October 11, 2010, 20:32

Hi
I'm using ANSYS12.1 and in CFX post I know that the velocity.curl give the magnitude of the vorticity. I was wondering what's the phisical meaning of areaint(velocity.curl ) or areaAve(velocity.curl ).

csmith_PADT · October 12, 2010, 15:58

The mathematical meaning of areaInt(velocity.curl) in CFX-Post is simply the sum of the vorticity magnitude over a specified surface, while areaAve(velocity.curl) is the average vorticity magnitude on that surface. Physically, it may give you an idea of the amount of rotation that is present in the fluid structures or vortex tubes passing through the surface in question. It will not give you any information about the direction of rotation or the orientation of the flow structures as they pass through your surface.

October 11, 2010, 20:32	Vorticity	#1
az_f Member Join Date: Mar 2009 Posts: 48 Rep Power: 17	Hi I'm using ANSYS12.1 and in CFX post I know that the velocity.curl give the magnitude of the vorticity. I was wondering what's the phisical meaning of areaint(velocity.curl ) or areaAve(velocity.curl ).

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October 12, 2010, 15:58		#2
csmith_PADT New Member Join Date: Sep 2010 Posts: 12 Rep Power: 15	The mathematical meaning of areaInt(velocity.curl) in CFX-Post is simply the sum of the vorticity magnitude over a specified surface, while areaAve(velocity.curl) is the average vorticity magnitude on that surface. Physically, it may give you an idea of the amount of rotation that is present in the fluid structures or vortex tubes passing through the surface in question. It will not give you any information about the direction of rotation or the orientation of the flow structures as they pass through your surface.