Gradient calculation in CFX

appu · May 27, 2011, 16:41

Hi

I am working on a CFD problem in which i have to calculate the gradient of circumfernetial velocity on a plane inside the model. i tried using Circumferential Velocity.Gradient X,Y,Z options but the issue is the X,Y and Z values are calculated based on the global coordinate system.So it will not serve my purpose, as i require the gradient about a point in that plane. So how to get this done. Do i have to apply some transformation on the coordinate system.

Guys please suggest some ways of doing this. Thanks in advane.

ghorrocks · May 28, 2011, 07:48

You should be able to do a simple transformation of the Circ. Velocity.Gradient components to get the gradient components in a different direction.

May 27, 2011, 16:41	Gradient calculation in CFX	#1
appu New Member appu Join Date: May 2011 Posts: 3 Rep Power: 15	Hi I am working on a CFD problem in which i have to calculate the gradient of circumfernetial velocity on a plane inside the model. i tried using Circumferential Velocity.Gradient X,Y,Z options but the issue is the X,Y and Z values are calculated based on the global coordinate system.So it will not serve my purpose, as i require the gradient about a point in that plane. So how to get this done. Do i have to apply some transformation on the coordinate system. Guys please suggest some ways of doing this. Thanks in advane.

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May 28, 2011, 07:48		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	You should be able to do a simple transformation of the Circ. Velocity.Gradient components to get the gradient components in a different direction.