convergence criterion in fluent

hotboy · December 8, 2014, 01:26

Hello friends! In the Residual Monitors of fluent ,the defalt convergence criterion is "absolute".Can I choose "none"? In some case ,it can not effect the result ,but in some others the result is not converged,that is why?

CeesH · December 8, 2014, 08:49

Hi Wanghuo,

I don't understand what you mean with in some cases it cannot effect the results, and in others it does not converge, can you elaborate?
I guess if you set convergence criterion to none it will not converge based on a certain value of the residuals - you disabled that - so you need to give other convergence criteria...

LuckyTran · December 9, 2014, 07:26

In the GUI, uncheck the boxes labeled under "Check"

Disabling this option disables the comparison of the residuals with the the criteria as a terminating condition and allows the simulation to keep iterating.

December 8, 2014, 01:26	convergence criterion in fluent	#1
hotboy Member wanghuo Join Date: Aug 2014 Posts: 89 Rep Power: 11	Hello friends! In the Residual Monitors of fluent ,the defalt convergence criterion is "absolute".Can I choose "none"? In some case ,it can not effect the result ,but in some others the result is not converged,that is why?

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December 8, 2014, 08:49		#2
CeesH Senior Member Cees Haringa Join Date: May 2013 Location: Delft Posts: 607 Rep Power: 0	Hi Wanghuo, I don't understand what you mean with in some cases it cannot effect the results, and in others it does not converge, can you elaborate? I guess if you set convergence criterion to none it will not converge based on a certain value of the residuals - you disabled that - so you need to give other convergence criteria...

December 9, 2014, 07:26		#3
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 66	In the GUI, uncheck the boxes labeled under "Check" Disabling this option disables the comparison of the residuals with the the criteria as a terminating condition and allows the simulation to keep iterating.