Use UDF to change the attack angle of flow over 3D wing

nvtrieu · May 3, 2013, 03:07

Hi everyone,

I am a new with ANSYS FLUENT. I am doing simulation with the flow over 3Dwing (NACA0012). I want to change the attack angle by using UDF. Could anyone teach me how to use the UDF for this case?
thanks you!

Xavier

blackmask · May 3, 2013, 03:34

Are you studying the pitching motion of the wing or you simply want to study the flow at several angles of attack?

Ananthakrishnan · May 3, 2013, 05:55

Hi,
if it just the angle of attack which you want to change, you can do it directly by changing the x and y component of velocity in the velocity inlent boundary condition.
If you want to learn to do it in udf you have to do the same by writing this component inside a small c program..
this is an example of how the inlet velocity is changed according to the y distance to get a profile

http://combust.hit.edu.cn:8080/fluen...udf/node61.htm

Far · May 3, 2013, 14:42

You can also do it in workbench

May 3, 2013, 03:07	Use UDF to change the attack angle of flow over 3D wing	#1
nvtrieu Member nguyen van trieu Join Date: Jul 2009 Posts: 43 Rep Power: 5	Hi everyone, I am a new with ANSYS FLUENT. I am doing simulation with the flow over 3Dwing (NACA0012). I want to change the attack angle by using UDF. Could anyone teach me how to use the UDF for this case? thanks you! Xavier

May 3, 2013, 14:42		#4
Far Super Moderator Sijal Ahmed Memon (turboenginner@gmail.com) Join Date: Mar 2009 Location: Islamabad Pakistan Posts: 3,069 Blog Entries: 4 Rep Power: 30	You can also do it in workbench __________________ Best Regards Far http://cfd-consultancy.webs.com/

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May 3, 2013, 03:34		#2
blackmask Senior Member Join Date: Aug 2011 Posts: 117 Rep Power: 6	Are you studying the pitching motion of the wing or you simply want to study the flow at several angles of attack?

May 3, 2013, 05:55		#3
Ananthakrishnan Senior Member Ananthakrishnan.A.S Join Date: Feb 2012 Location: Paris, France Posts: 104 Rep Power: 5	Hi, if it just the angle of attack which you want to change, you can do it directly by changing the x and y component of velocity in the velocity inlent boundary condition. If you want to learn to do it in udf you have to do the same by writing this component inside a small c program.. this is an example of how the inlet velocity is changed according to the y distance to get a profile http://combust.hit.edu.cn:8080/fluen...udf/node61.htm