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Forum: OpenFOAM Running, Solving & CFD October 5, 2010, 08:26
Replies: 55
Views: 20,490
Posted By herbert
I think directMappedVelocityFluxFixedValue...

I think directMappedVelocityFluxFixedValue recyles the velocity and the flux whereas directMappedFixedValue (which we are using here) only patches velocity in this case.

The biggest disadvantage...
Forum: OpenFOAM Running, Solving & CFD October 5, 2010, 07:14
Replies: 55
Views: 20,490
Posted By herbert
Hi Mad, sorry it was my fault. The definiton...

Hi Mad,

sorry it was my fault. The definiton in the boundary file is correct, but in your U file the BC-type must be directMapped (not directMappedFixedValue).

Sorry again,
Stefan
Forum: OpenFOAM Running, Solving & CFD October 5, 2010, 05:56
Replies: 55
Views: 20,490
Posted By herbert
Yes. It is not used as a boundary condition.

Yes. It is not used as a boundary condition.
Forum: OpenFOAM Running, Solving & CFD October 5, 2010, 04:22
Replies: 55
Views: 20,490
Posted By herbert
I'd would do it vice versa: fanOutlet =...

I'd would do it vice versa:


fanOutlet = domain inlet

U: directMappedFixedValue, setAverage: massFlowRate/Area
p: zeroGradient


fanInlet = domain outlet
Forum: OpenFOAM Running, Solving & CFD October 5, 2010, 03:49
Replies: 55
Views: 20,490
Posted By herbert
Even it is not included explictly it should be...

Even it is not included explictly it should be predicted correctly. Having non-zero velocities in your domain will always cause a pressure gradient. Therefore you should find a pressure difference...
Forum: OpenFOAM Running, Solving & CFD October 5, 2010, 03:43
Replies: 55
Views: 20,490
Posted By herbert
I've used a similar approach some time ago and I...

I've used a similar approach some time ago and I rember some problem with doing the additional pressure coupling. For a first shot I'd try to couple only the velocity.

Regards,
Stefan
Forum: OpenFOAM Running, Solving & CFD October 5, 2010, 03:21
Replies: 55
Views: 20,490
Posted By herbert
Hi, i just came around this post and like to...

Hi,

i just came around this post and like to make a suggestion. If I understood you well, you know about the mass flow and your simulation is incompressible.

If so, you can use directMapped-BC...
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