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Forum: OpenFOAM Running, Solving & CFD June 28, 2017, 11:17
Replies: 16
Views: 1,126
Posted By Kina
One more thing you can try to see if the solver...

One more thing you can try to see if the solver at least takes more iterations to blow up:

in the fvSolution, change the underrelaxation to:


relaxationFactors
{
fields
{
p ...
Forum: OpenFOAM Running, Solving & CFD June 28, 2017, 10:55
Replies: 16
Views: 1,126
Posted By Kina
Should be ok with the nut. Depending if you're...

Should be ok with the nut. Depending if you're using LowRe SST, you can set the nut for wall to type calculated; value 0;
In case you are allowed to share the case files, I'd be willing to have a...
Forum: OpenFOAM Running, Solving & CFD June 28, 2017, 07:38
Replies: 16
Views: 1,126
Posted By Kina
Without seeing a picture of your setup, I'd...

Without seeing a picture of your setup, I'd suggest the following:



In summary: your BCs don't make much sense
- You are specifying pressure and velocity outlet
- you are specifying k and...
Forum: OpenFOAM Running, Solving & CFD June 27, 2017, 10:54
Replies: 16
Views: 1,126
Posted By Kina
The maxIter stuff doesn't solve a problem. It's...

The maxIter stuff doesn't solve a problem. It's not supposed to. I'm just saying that if your solver takes more than 100 iterations to solve the matrix, there's something wrong with your setup.

I...
Forum: OpenFOAM Running, Solving & CFD June 27, 2017, 02:40
Replies: 16
Views: 1,126
Posted By Kina
In fvSolution, put for p: solver GAMG; ...

In fvSolution, put for p:

solver GAMG;
smoother GaussSeidel;
tolerance 1e-7;
relTol 0.01;
maxIter 100;

The rest looks fine. Of course, your skewness and non-orthogonality are pretty high...
Forum: OpenFOAM Running, Solving & CFD June 26, 2017, 09:34
Replies: 16
Views: 1,126
Posted By Kina
Can you post the checkMesh output? Also, I would...

Can you post the checkMesh output? Also, I would go for maxIter 100 on the velocity solver.
Forum: OpenFOAM Running, Solving & CFD June 25, 2017, 15:21
Replies: 16
Views: 1,126
Posted By Kina
Why are you using such fancy schemes? for...

Why are you using such fancy schemes?
for grad, I would start with "default linear"
for snGrad, I would stay with "default corrected"
for div(phi,U), I would start with "bounded Gauss upwind" and...
Forum: OpenFOAM Running, Solving & CFD June 22, 2017, 03:47
Replies: 16
Views: 1,126
Posted By Kina
please post fvSolution, fvSchemes and controlDict...

please post fvSolution, fvSchemes and controlDict as code.
Why is your timestep 0.001 (looks transient) but your solver seems to be simpleFoam (steady)?

cheers
alex
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