parabolic velocity with unsteady simulation

mona_zooghool · March 16, 2010, 07:42

Hello,

could anyone possibly guide me how to run unsteady simulation using aparabolic velocity inlet please?
my equation is :

2*u*(1-(r^2/R^2))

I think i have to creat a field function which is time dependant but so far i have not been successful...

Thanks a lot

Vinicius · March 17, 2010, 08:08

I´m not seeing the time in your equation, and what you mean with r and R. You have to create field functions, and probably a local coordinate system to set the r and R properly. Can you explain better your equation ?

mona_zooghool · March 18, 2010, 07:43

Thanks a lot for your reply, I believe I have to use the navier stokes equation in the Star ccm+. but my problem is that the software gives me error when i put the code in the new field.

March 16, 2010, 07:42	parabolic velocity with unsteady simulation	#1
mona_zooghool New Member MONA Join Date: Mar 2010 Posts: 2 Rep Power: 0	Hello, could anyone possibly guide me how to run unsteady simulation using aparabolic velocity inlet please? my equation is : 2u(1-(r^2/R^2)) I think i have to creat a field function which is time dependant but so far i have not been successful... Thanks a lot

March 18, 2010, 07:43	Thank you	#3
mona_zooghool New Member MONA Join Date: Mar 2010 Posts: 2 Rep Power: 0	Thanks a lot for your reply, I believe I have to use the navier stokes equation in the Star ccm+. but my problem is that the software gives me error when i put the code in the new field.

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March 17, 2010, 08:08		#2
Vinicius Member Vinicius Girardi Join Date: Mar 2009 Location: Sao Paulo, Brazil Posts: 80 Rep Power: 17	I´m not seeing the time in your equation, and what you mean with r and R. You have to create field functions, and probably a local coordinate system to set the r and R properly. Can you explain better your equation ?