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Forum: FLUENT

April 2, 2012, 03:19

Replies: 19

under-relaxation factors -> level of residuals

Views: 40,569

Posted By Zigainer

Hi, I guess that is my problem .... I...

Hi,

I guess that is my problem .... I would like to avoid using unsteady solver ... but it actually seems that you described the problem perfectly!
I only have this problem with the highest...

Forum: FLUENT

March 29, 2012, 07:34

Replies: 19

under-relaxation factors -> level of residuals

Views: 40,569

Posted By Zigainer

So I could manage to increase the under...

So I could manage to increase the under relaxation factors (not to the default values, but around 2/3 of them).
So now I am at the point where residuals do not decrease any more, they oscillate...

Forum: FLUENT

March 21, 2012, 14:30

Replies: 19

under-relaxation factors -> level of residuals

Views: 40,569

Posted By Zigainer

But as long as my distribution is changing, I...

But as long as my distribution is changing, I have to continue ..... right
What I just wanted to say, if my residuals are at one level the distribution should not change any more, right. OItherwise...

Forum: FLUENT

March 21, 2012, 14:21

Replies: 19

under-relaxation factors -> level of residuals

Views: 40,569

Posted By Zigainer

But if I reach my limit, my solution should not...

But if I reach my limit, my solution should not be change any more, right. So just to be safe, if I reach the limit of my simulation I can be sure that the distribution does not change any more,...

Forum: FLUENT

March 21, 2012, 13:57

Replies: 19

under-relaxation factors -> level of residuals

Views: 40,569

Posted By Zigainer

Hi LuckyTram, thanks for this answer!!!...

Hi LuckyTram,

thanks for this answer!!! Really good explanation.

That is one very important point I am facing right now. I do iterate until my residuals do not change any more (problem...

Forum: FLUENT

March 20, 2012, 09:16

Replies: 19

under-relaxation factors -> level of residuals

Views: 40,569

Posted By Zigainer

under-relaxation factors -> level of residuals

Hi,

I have a question regarding the under-relaxation factors.
If I use the default values I can’t get convergence so I started to decrease the under-relaxation values (to about 1/3 of...

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