Convergence UDF

L3munoz · July 26, 2009, 06:06

Hi!!!

I had another question...Convergence in my simulation case is obtained when Cm (moment coefficient) is uniformed. I wanted to do somehow a program to check the difference of Cm value in the last X iterations and see if it changed a lot or not in order to see convergence...

Shall I do it via UDF?? or is there any other way?? In case UDF is the answer, does anybody have idea of how to do it?? Do u know of any place where to have a look to know it better??

Thanks in advance!

Jorge.

gubarrani · January 4, 2011, 03:17

hi Jorge !!!

do you have any progress with your problem? How did you solve it? I have also similar problem to check the convergence during iteration with the ca, cd or cm values.

guba...

L3munoz · January 4, 2011, 09:04

Hi gubarrani,

the only thing i can tell u is use monitors to check convergence. Not only residuals but also Cd values can be plotted and shown in Fluent. Moreover, you can get a .txt file where these values are written, helping you for checking it!

Regards,

L3munoz.

July 26, 2009, 06:06	Convergence UDF	#1
L3munoz Member Jorge Muñoz Join Date: Apr 2009 Posts: 56 Rep Power: 17	Hi!!! I had another question...Convergence in my simulation case is obtained when Cm (moment coefficient) is uniformed. I wanted to do somehow a program to check the difference of Cm value in the last X iterations and see if it changed a lot or not in order to see convergence... Shall I do it via UDF?? or is there any other way?? In case UDF is the answer, does anybody have idea of how to do it?? Do u know of any place where to have a look to know it better?? Thanks in advance! Jorge.

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January 4, 2011, 03:17		#2
gubarrani New Member osman Join Date: Jan 2011 Posts: 3 Rep Power: 15	hi Jorge !!! do you have any progress with your problem? How did you solve it? I have also similar problem to check the convergence during iteration with the ca, cd or cm values. guba...

January 4, 2011, 09:04		#3
L3munoz Member Jorge Muñoz Join Date: Apr 2009 Posts: 56 Rep Power: 17	Hi gubarrani, the only thing i can tell u is use monitors to check convergence. Not only residuals but also Cd values can be plotted and shown in Fluent. Moreover, you can get a .txt file where these values are written, helping you for checking it! Regards, L3munoz.