Question about udf. can we do it.

diamondx · August 20, 2012, 11:29

Good morning/evening:
Can i affect the velocity profil along y-direction using UDF.
I'm aware that we can customize the velocity profil in a boundary condition, for example if we want a parabolic profil for the velocity in a duct, but can i do that inside the duct ? Some of you may wanna know why.
I'm actually trying to simulate plasma, i tried placing source term next to the wall to get a velocity not equal to zero. and now i wanna do that by changing the velocity profil, is it possible ?

blackmask · August 21, 2012, 02:35

Yes, you can. Consult to the fluent UDF manual and look at the related sections on DEFINE_ADJUST and DEFINE_EXEC_AT_END.

August 20, 2012, 11:29	Question about udf. can we do it.	#1
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	Good morning/evening: Can i affect the velocity profil along y-direction using UDF. I'm aware that we can customize the velocity profil in a boundary condition, for example if we want a parabolic profil for the velocity in a duct, but can i do that inside the duct ? Some of you may wanna know why. I'm actually trying to simulate plasma, i tried placing source term next to the wall to get a velocity not equal to zero. and now i wanna do that by changing the velocity profil, is it possible ? __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

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August 21, 2012, 02:35		#2
blackmask Senior Member Join Date: Aug 2011 Posts: 421 Blog Entries: 1 Rep Power: 22	Yes, you can. Consult to the fluent UDF manual and look at the related sections on DEFINE_ADJUST and DEFINE_EXEC_AT_END.