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Forum: OpenFOAM Running, Solving & CFD

May 3, 2006, 12:21

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi Kumar, the SpalartAllmar

Hi Kumar,

the SpalartAllmaras model did a good job. The lift prediction was ok.

As far as I understood the SpalartAllmaras model, it is like a low-Re formulation. The formulation has no...

Forum: OpenFOAM Running, Solving & CFD

March 24, 2006, 05:33

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi! I think, I've got the p

Hi!

I think, I've got the problem now.

As I wrote in the start post, I used two definitions of epsilon at the inlet. The first one gave a small and the second (CFX) a great epsilon. As I...

Forum: OpenFOAM Running, Solving & CFD

March 22, 2006, 13:42

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi! I tried a run with the

Hi!

I tried a run with the "fixed value" boundary conditions. But there was no difference.

So I did a calculation with 0° angle of attack. Even there the flow "seperates", means there is an...

Forum: OpenFOAM Running, Solving & CFD

March 22, 2006, 08:53

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi! First I want to thank y

Hi!

First I want to thank you all for your help!!

Yes, the boundary conditions were zero gradient, so I'll try fixed value. But why could this matter with turbulence model laminar? k and...

Forum: OpenFOAM Running, Solving & CFD

March 22, 2006, 08:14

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi! I checked the mass cont

Hi!

I checked the mass continuity, but everthing is like it should be. And I checked the mesh by hand and found no mistake.

Andreas

Forum: OpenFOAM Running, Solving & CFD

March 21, 2006, 11:07

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi, again! I use an own wri

Hi, again!

I use an own written mesh generator. I just give the profil coordinates and the mesh is autogenerated. Perhaps there is something wrong. But checkMesh doesn't throw any error.
...

Forum: OpenFOAM Running, Solving & CFD

March 21, 2006, 11:02

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi! I tried the easiest cas

Hi!

I tried the easiest case I can think of with simpleFoam. Coarse mesh with no turbulence model (exactly laminar dummy model) and upwind scheme where possible.
There are still seperation...

Forum: OpenFOAM Running, Solving & CFD

March 20, 2006, 09:45

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi! I think completly ident

Hi!

I think completly identical is not possible. I used the Hiresolution scheme in CFX which, as I understood, should be equal to the gamma scheme in OpenFOAM.
So it should be equal.
You...

Forum: OpenFOAM Running, Solving & CFD

March 20, 2006, 08:39

Replies: 18

Too much turbulence

Views: 3,904

Posted By andimb

Hi! I'm still calculating a

Hi!

I'm still calculating a flow around a NACA airfoil and compare it to a CFX solution.
I use the LaunderSharmaKE turbulence model with an yplus near 1.
If I start a calculation with the...

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