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Forum: STAR-CCM+

August 11, 2014, 08:29

Replies: 8

Under-relaxation factors

Views: 3,189

Posted By dai549592484

do you use skype? You should first make sure...

do you use skype?

You should first make sure your interation is finished in 1 time step, that means time is not marching so that you can judge whether solution is converged in one time step.

Forum: STAR-CCM+

August 11, 2014, 07:46

Replies: 8

Under-relaxation factors

Views: 3,189

Posted By dai549592484

I mean you should plot the pressure against...

I mean you should plot the pressure against number of iteration. and check the pressure variation within 1 time step. Ideally, when the impact happened. How did you monitor the pressure?

Forum: STAR-CCM+

August 11, 2014, 05:55

Replies: 8

Under-relaxation factors

Views: 3,189

Posted By dai549592484

Hi jcamilleri Have you done grid independent...

Hi jcamilleri

Have you done grid independent test?
Are you using first order time discritization method or second order?
If second order is used you need to make sure your maximum CFL is not...

Forum: STAR-CCM+

August 11, 2014, 04:38

Replies: 8

Under-relaxation factors

Views: 3,189

Posted By dai549592484

are you sure that for transient cases, the CFL...

are you sure that for transient cases, the CFL has to be greater than 5?

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