CFX-post, how to change torque reference point

air_fun · September 21, 2011, 08:44

Hi,

I'm a student doing a final project using CFD. I'm currently new with CFX-post and i'm having difficulties searching for the aerodynamic moment value for my wing.
I have learned that the the torque value showed in the function calculator is using the (0,0,0) coordinate as the reference point, but my aerodynamic center isnt on the (0,0,0) coordinate. Is it possible to change the reference point for torque?
Changing the geometry to make the (0,0,0) as the aerodynamic center isnt an option for me because it means having to change the blocking/mesh which is quite complex. I have and still searching for this in the helps and tutorial documentation, but having no luck finding a solution.

Thanks

singer1812 · September 21, 2011, 09:09

Create a new coord frame. Hit the icon that looks like a coord, and place it where you want, oriented how you want.

Then in the function calc, this coord frame will be available.

air_fun · September 21, 2011, 10:56

Hi,
Thank you very much for your answer. It helped alot

.
now i have a chance to finish my work ontime.

September 21, 2011, 08:44	CFX-post, how to change torque reference point	#1
air_fun New Member irfan Join Date: Sep 2011 Posts: 10 Rep Power: 14	Hi, I'm a student doing a final project using CFD. I'm currently new with CFX-post and i'm having difficulties searching for the aerodynamic moment value for my wing. I have learned that the the torque value showed in the function calculator is using the (0,0,0) coordinate as the reference point, but my aerodynamic center isnt on the (0,0,0) coordinate. Is it possible to change the reference point for torque? Changing the geometry to make the (0,0,0) as the aerodynamic center isnt an option for me because it means having to change the blocking/mesh which is quite complex. I have and still searching for this in the helps and tutorial documentation, but having no luck finding a solution. Thanks

September 21, 2011, 09:09		#2
singer1812 Senior Member Edmund Singer P.E. Join Date: Aug 2010 Location: Minneapolis, MN Posts: 511 Rep Power: 20	Create a new coord frame. Hit the icon that looks like a coord, and place it where you want, oriented how you want. Then in the function calc, this coord frame will be available. hamed623 likes this.

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September 21, 2011, 10:56		#3
air_fun New Member irfan Join Date: Sep 2011 Posts: 10 Rep Power: 14	Hi, Thank you very much for your answer. It helped alot . now i have a chance to finish my work ontime.