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Forum: OpenFOAM Running, Solving & CFD

May 4, 2005, 15:17

Replies: 12

TurbFoam

Views: 4,530

Posted By henry

2) As far as possible we try t

2) As far as possible we try to write codes which represent reality and operate with physical initial and boundary conditions. I do not know if Fluent is designed to operate in the same way.

Forum: OpenFOAM Running, Solving & CFD

May 4, 2005, 15:14

Replies: 12

TurbFoam

Views: 4,530

Posted By henry

1) No, the cavity case has ini

1) No, the cavity case has inifinte shear at the moving wall which does not introduce a continuity error.

3) I do not understand why you insist on starting from an unphysical condition when it...

Forum: OpenFOAM Running, Solving & CFD

May 4, 2005, 13:36

Replies: 12

TurbFoam

Views: 4,530

Posted By henry

This is not a continuity voila

This is not a continuity voilation it's an issue of definition. How do you think the continuity error should be defined for a steady-state case where the time-step is irrelevant?

Forum: OpenFOAM Running, Solving & CFD

May 4, 2005, 11:46

Replies: 12

TurbFoam

Views: 4,530

Posted By henry

The continuity error is scaled

The continuity error is scaled with the time-step (see continuityErrs.H) which is appropriate for transient flow but not for steady-state. We should probably use a different definition for...

Forum: OpenFOAM Running, Solving & CFD

May 4, 2005, 09:45

Replies: 12

TurbFoam

Views: 4,530

Posted By henry

I don't understand your use of

I don't understand your use of deltaT with simpleFoam. simpleFoam is a steady-state solver and doesn't use deltaT, at least not if you choose the steadyState time discretisation scheme in fvSchemes...

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