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Forum: OpenFOAM Running, Solving & CFD

November 22, 2011, 05:15

Replies: 8

bubbleFoam - behavior on finer mesh

Views: 1,901

Posted By darai

Final Results

Hello All,

Thanks again for the recommendations. You were right... the Time step has quite influence on the convergence / divergence of the whole model.

I tried the "adjustTimeStep" switch...

Forum: OpenFOAM Running, Solving & CFD

November 15, 2011, 08:43

Replies: 8

bubbleFoam - behavior on finer mesh

Views: 1,901

Posted By darai

Time step

Hello Anton,

Thanks for the hint... No, I did not...
I know this:
\Delta t \cdot \sum_{i=1}^{n} \frac{u_{x_{i}}}{\Delta x_{i}}\leq C

The original model (crude) was:
dx = 0.01 m
max...

Forum: OpenFOAM Running, Solving & CFD

November 15, 2011, 05:30

Replies: 8

bubbleFoam - behavior on finer mesh

Views: 1,901

Posted By darai

fvSolution

Hello all,

In the next step, I am going to try to change the fvScheme file... but I have no clue which is good to modify first... I do know what the lines in fvScheme stand's for and I do know how...

Forum: OpenFOAM Running, Solving & CFD

November 15, 2011, 05:05

Replies: 8

bubbleFoam - behavior on finer mesh

Views: 1,901

Posted By darai

Convergence

So, in the first step I examined the convergence and it is as those attached graphs shows.
The most correct calculation, with the crude hexahedral mesh looks like this:
(convergence of p in...

Forum: OpenFOAM Running, Solving & CFD

November 15, 2011, 02:56

Replies: 8

bubbleFoam - behavior on finer mesh

Views: 1,901

Posted By darai

bubbleFoam - behavior on finer mesh

Hello foamers,

I am investigating a case of completely closed domain where a large bubble is rising and spreading across the ceiling. The domain is a cylinder "on side" and the calculation works...

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