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Forum: FLUENT

July 22, 2013, 04:41

Replies: 11

Unsteady problems - under-relaxation factors

Views: 2,688

Posted By openfoammaofnepo

OK, thank you very much. if I just use one...

OK, thank you very much. if I just use one iteration for each time step, but the convergence is reached for that iteration. So the under-relaxation is still can be used for unsteady time marching.

Forum: FLUENT

July 22, 2013, 04:32

Replies: 11

Unsteady problems - under-relaxation factors

Views: 2,688

Posted By openfoammaofnepo

Because, for example, when i use the time step is...

Because, for example, when i use the time step is 1.0d-04, and then I use under-relaxation factor is 0.1, in terms of time marching, does it mean that the effective time step will be reduced? In...

Forum: FLUENT

July 21, 2013, 15:29

Replies: 11

Unsteady problems - under-relaxation factors

Views: 2,688

Posted By openfoammaofnepo

Thank you very much. But I think this is a...

Thank you very much. But I think this is a general CFD problem. Does anybody know something about this?

Forum: FLUENT

July 21, 2013, 15:09

Replies: 11

Unsteady problems - under-relaxation factors

Views: 2,688

Posted By openfoammaofnepo

Hi All, Is it reasonable to use an...

Hi All,

Is it reasonable to use an under-relaxation factor for unsteady simulation? I think it is not, but I found that some of the Openfoam tutorials still have the options for under-relaxation...

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