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-   -   HELP !In relaxtion factor converge is taken or not (http://www.cfd-online.com/Forums/fluent/37919-help-relaxtion-factor-converge-taken-not.html)

MANOJ KUMAR September 16, 2005 04:52

HELP !In relaxtion factor converge is taken or not
 
hi i doing combustion problem. it converge but at the low solution parameter means relaxtaion factor.it taken or not. i started at low value like pressure,energy,tarbulent,and moment and going to default value but in some case like energy it converge at low value but other converge at default vale is this converge is taken or not. please help

Manoj Kumar September 16, 2005 07:38

Re: HELP !In relaxtion factor converge is taken or
 
Hi

You are able to reach convergence of residuals, isn't it? If so, then whats the problem?

Regards,

Manoj

MANOJ KUMAR September 17, 2005 07:20

Re: HELP !In relaxtion factor converge is taken or
 
thanks for reply but convrge at lower than default value is it accept ? it converge but the flue gas temperature is so high. the temperature of combustion at nozzle is 3700 K and flue gas is 3500 K so it is accept as converge solution or not


Manoj Kumar September 18, 2005 13:41

Re: HELP !In relaxtion factor converge is taken or
 
Yes. Convergence at lower than default value is acceptable. I would suggest you to go though fluent guide or any text to understand what under-relaxation is.

As far as accuracy of your results are concerned, that is dependent on the flow model and other algorithms that u select , as well as on the grid size and parameters that you input.

Manoj

MANOJ KUMAR September 20, 2005 05:18

Re: HELP !In relaxtion factor converge is taken or
 
Thanks for reply Can u please give me ur e-mail so i can give detail description of my problem.

Manoj Kumar September 22, 2005 04:16

Re: HELP !In relaxtion factor converge is taken or
 
U can mail me at manoj.me@gmail.com


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