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Forum: OpenFOAM Running, Solving & CFD

June 4, 2007, 10:29

Replies: 13

Stability issue while running buoyantFoam

Views: 1,947

Posted By fandall

Thanks for thinking aloud. Out

Thanks for thinking aloud. Out of these two, I would also go for the boundary conditions as the computation runs great for a rather big number of time steps. I'll reconsider my choice of b.c.'s...

Forum: OpenFOAM Running, Solving & CFD

June 4, 2007, 08:56

Replies: 13

Stability issue while running buoyantFoam

Views: 1,947

Posted By fandall

So, setting up every divergenc

So, setting up every divergence scheme with upwind, the last one described as above, I end up with the same explosion of the temperature solution with which I started: The computation runs smoothly...

Forum: OpenFOAM Running, Solving & CFD

June 4, 2007, 08:25

Replies: 13

Stability issue while running buoyantFoam

Views: 1,947

Posted By fandall

Perhaps I found the missing ar

Perhaps I found the missing argument:
If I want to use an upwind scheme on the term on line 46, it seems that I have to specify to which reference the upwind direction is identified. So I guess...

Forum: OpenFOAM Running, Solving & CFD

June 4, 2007, 08:01

Replies: 13

Stability issue while running buoyantFoam

Views: 1,947

Posted By fandall

I'm running Version 1.2 on thi

I'm running Version 1.2 on this machine.
If I try it without the limiter, I still get the same error message...

Forum: OpenFOAM Running, Solving & CFD

June 4, 2007, 07:40

Replies: 13

Stability issue while running buoyantFoam

Views: 1,947

Posted By fandall

I still can't find any errors

I still can't find any errors :-(
I deposited my fvschemes file here:
http://n.ethz.ch/student/rohnerth/download/fvSchemes
All the other files in the system folder haven't been altered (except...

Forum: OpenFOAM Running, Solving & CFD

June 4, 2007, 03:41

Replies: 13

Stability issue while running buoyantFoam

Views: 1,947

Posted By fandall

I can't figure out why it show

I can't figure out why it shows this error message. "Attempt to read beyond EOF" means, that it attempts to read beyond the end of the file if I'm not mistaken, but I haven't forgotten a semicolon or...

Forum: OpenFOAM Running, Solving & CFD

June 4, 2007, 03:20

Replies: 13

Stability issue while running buoyantFoam

Views: 1,947

Posted By fandall

Wow thanks! Altough I learne

Wow thanks!
Altough I learned about the stability of upwind schemes in my lectures, it didn't occur to me to use them (*D'oh*). I somehow thought this didn't apply to turbulent flow :-) Will...

Forum: OpenFOAM Running, Solving & CFD

June 1, 2007, 05:01

Replies: 13

Stability issue while running buoyantFoam

Views: 1,947

Posted By fandall

I'm experiencing some trouble

I'm experiencing some trouble running the buoyantFoam solver. During computation, while the Courant Numbers are still below 1, the following message, even if I employed a smaller timestep, appeared...

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