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Forum: OpenFOAM Running, Solving & CFD

April 8, 2014, 11:11

Replies: 10

Same case run twice I got different results, what's going wrong?

Views: 1,810

Posted By alexeym

And case blows-up only when run on more than one...

And case blows-up only when run on more than one node? (i.e. 4 and 16 core variants converge).

Forum: OpenFOAM Running, Solving & CFD

April 8, 2014, 11:02

Replies: 10

Same case run twice I got different results, what's going wrong?

Views: 1,810

Posted By alexeym

OK. - What decomposition method do you use? ...

OK.

- What decomposition method do you use?
- Does 4 and 16 core decomposition mean that you're running the case on a single node?

Forum: OpenFOAM Running, Solving & CFD

April 8, 2014, 10:40

Replies: 10

Same case run twice I got different results, what's going wrong?

Views: 1,810

Posted By alexeym

Well, In the first part of the answer you've...

Well,

In the first part of the answer you've used GAMG solver, can you show your settings for this solver? As it will do interpolation between coarse and fine meshes and maybe the difference in...

Forum: OpenFOAM Running, Solving & CFD

April 8, 2014, 02:03

Replies: 10

Same case run twice I got different results, what's going wrong?

Views: 1,810

Posted By alexeym

Hi, it seems you've got rather strange...

Hi,

it seems you've got rather strange settings in fvSolution. 1000 is a default value for maximum number of iterations for linear system solvers, and as GAMG can't fulfill your tolerance settings...

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