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Forum: OpenFOAM Running, Solving & CFD

February 16, 2011, 17:44

Replies: 44

Pressure instability with rhoSimpleFoam

Views: 26,345

Posted By aerothermal

OK. I am downloading it now to take a look.

OK. I am downloading it now to take a look.

Forum: OpenFOAM Running, Solving & CFD

February 16, 2011, 17:11

Replies: 44

Pressure instability with rhoSimpleFoam

Views: 26,345

Posted By aerothermal

One thing that helped a lot was to mirror the...

One thing that helped a lot was to mirror the mesh.
In case of cylinder I mirrored it at mid plane from top to bottom.
So the numerical disturbances did not cause any further symmetry issues.

Forum: OpenFOAM Running, Solving & CFD

February 16, 2011, 14:48

Replies: 44

Pressure instability with rhoSimpleFoam

Views: 26,345

Posted By aerothermal

Hi Alberto, I do not know yet the causes but...

Hi Alberto,

I do not know yet the causes but I am still investigating.

The mesh is tetra based with one region and a prism layer around the cylinder. From wikki site I saw that 1.6-ext has some...

Forum: OpenFOAM Running, Solving & CFD

February 16, 2011, 13:28

Replies: 44

Pressure instability with rhoSimpleFoam

Views: 26,345

Posted By aerothermal

my case converged

Dear ptbs,

My low Mach cylinder case in a small tunnel (almost a duct) converged. The waves still does appear but they are not as critical as before.

I used the OF1.6-ext instead of OF1.7.1. It...

Forum: OpenFOAM Running, Solving & CFD

February 12, 2011, 09:35

Replies: 44

Pressure instability with rhoSimpleFoam

Views: 26,345

Posted By aerothermal

Hi Patty, Try to use divSchemes div(phi,U)...

Hi Patty,

Try to use divSchemes div(phi,U) Gauss limitedLinearV 1.0
Usually it helps to stabilize.

I manage to converge my case but the results are not good.
I will posto some results here...

Forum: OpenFOAM Running, Solving & CFD

December 5, 2010, 20:52

Replies: 44

Pressure instability with rhoSimpleFoam

Views: 26,345

Posted By aerothermal

Hi Alberto, The last post is from 2006 but...

Hi Alberto,

The last post is from 2006 but the user joined in 2009!
Certainly I will open a new thread. Thanks.

Regards,

Guilherme

Forum: OpenFOAM Running, Solving & CFD

December 5, 2010, 06:59

Replies: 44

Pressure instability with rhoSimpleFoam

Views: 26,345

Posted By aerothermal

Hi Daniel, Did you solve your issue? If...

Hi Daniel,

Did you solve your issue?
If not, I will post my issue here. If affirmatively, I will try your solution.

Regards,

Guilherme

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