Draw the tangential, axial and radial velocity for flow section

Al-Hashimi · August 11, 2013, 16:23

Hello everyone,

I’m trying to draw the tangential, axial and radial velocity for flow section, the velocity profiles I got is not symmetric while it should be symmetric on axis … I found in other post in cfd-online that they say “In cfx post go to turbo mode then define your rotation axis next click calculate velocity components. Now you can plot the variables you need”

Kindly how can I change the rotation axis in cfd post? Do you think this will solve the problem?

Kind regards

Tang. Velocity.jpg

Axial v.jpg

Radial v.jpg

Jim87 · August 11, 2013, 17:33

Hope I understand you in the right way.

You can define new perspictive of your results in contours, vectors etc.

You can only use displaying of component x or y or z. (If you use x and y you have the radial components of you vector

You can export your cell velocity values with file-interpolate and marking the vectors and the region

Or was your question to redefine the coordiante system from carthesian to cylindrical coordinate system?

mjgraf · August 11, 2013, 22:23

when you click the Turbo tab there is a button at the bottom to Define the global Rotation Axis.

Al-Hashimi · August 12, 2013, 01:16

Thank you very much for the advice, but kindly why i get the error in the pic below?
I'm trying to define the rotation to be on Y axis ... should i change other components other than the global axis?

Failed.jpg

August 11, 2013, 16:23	Draw the tangential, axial and radial velocity for flow section	#1
Al-Hashimi Member Osamah Ali Al-Hashimi Join Date: Jul 2012 Posts: 44 Rep Power: 13	Hello everyone, I’m trying to draw the tangential, axial and radial velocity for flow section, the velocity profiles I got is not symmetric while it should be symmetric on axis … I found in other post in cfd-online that they say “In cfx post go to turbo mode then define your rotation axis next click calculate velocity components. Now you can plot the variables you need” *Kindly how can I change the rotation axis in cfd post? Do you think this will solve the problem?* Kind regards Tang. Velocity.jpg Axial v.jpg Radial v.jpg

August 11, 2013, 17:33		#2
Jim87 Member Stephan Langenberg Join Date: Sep 2011 Location: Germany Posts: 73 Rep Power: 14	Hope I understand you in the right way. You can define new perspictive of your results in contours, vectors etc. You can only use displaying of component x or y or z. (If you use x and y you have the radial components of you vector You can export your cell velocity values with file-interpolate and marking the vectors and the region Or was your question to redefine the coordiante system from carthesian to cylindrical coordinate system? Al-Hashimi likes this.

August 11, 2013, 22:23		#3
mjgraf Senior Member Join Date: Dec 2009 Posts: 131 Rep Power: 19	when you click the Turbo tab there is a button at the bottom to Define the global Rotation Axis. Al-Hashimi likes this.

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August 12, 2013, 01:16		#4
Al-Hashimi Member Osamah Ali Al-Hashimi Join Date: Jul 2012 Posts: 44 Rep Power: 13	Thank you very much for the advice, but kindly why i get the error in the pic below? I'm trying to define the rotation to be on Y axis ... should i change other components other than the global axis? Failed.jpg