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Forum: OpenFOAM Running, Solving & CFD

July 30, 2007, 09:49

Replies: 13

Convergence in sonicFoamforwardStep

Views: 1,401

Posted By lasb

Hi, Thanks. This may not be

Hi,

Thanks. This may not be the correct place to pose this question, but I'm very curious:

Are you just very helpful or do you work for openFoam?

Either way, I appreciate your help.
...

Forum: OpenFOAM Running, Solving & CFD

July 30, 2007, 04:02

Replies: 13

Convergence in sonicFoamforwardStep

Views: 1,401

Posted By lasb

Hi, I think you're right. I

Hi,

I think you're right. I just don't know where the solver equations are. If I look in the fvSolution it says PBiCG and PBC under solvers for p, U, etc.

Is PBiCG and PBC another way to...

Forum: OpenFOAM Running, Solving & CFD

July 27, 2007, 08:16

Replies: 13

Convergence in sonicFoamforwardStep

Views: 1,401

Posted By lasb

Hi, You're right about fvm

Hi,

You're right about fvm is implicit and fvc is explicit. But where do you see that Euler is fvm?

I can only see the sonicFoam.C file where all the ddt are fvm. Maybe that's the place to...

Forum: OpenFOAM Running, Solving & CFD

July 27, 2007, 04:29

Replies: 13

Convergence in sonicFoamforwardStep

Views: 1,401

Posted By lasb

Hi, I just thought that Eul

Hi,

I just thought that Euler automatically meant forward (explicit) Euler. And you made it backward Euler (implicit) by typing backward instead of euler. Therefore it would be more stable. ...

Forum: OpenFOAM Running, Solving & CFD

July 26, 2007, 10:54

Replies: 13

Convergence in sonicFoamforwardStep

Views: 1,401

Posted By lasb

Hi, I'm using foam 1.4. And

Hi,

I'm using foam 1.4. And I ran it with the settings you told me. I'm pretty sure I didn't change any of the default settings, but I'll have to dobbelcheck that one.

I'll let you know if...

Forum: OpenFOAM Running, Solving & CFD

July 26, 2007, 09:40

Replies: 13

Convergence in sonicFoamforwardStep

Views: 1,401

Posted By lasb

Hi Stephan, I expected a de

Hi Stephan,

I expected a decrease in \delta(t) would result in a decrease in the Courant number (a slower divergence, (I found the opposite)).

Backward is ofcourse more stable. But the...

Forum: OpenFOAM Running, Solving & CFD

July 26, 2007, 07:03

Replies: 13

Convergence in sonicFoamforwardStep

Views: 1,401

Posted By lasb

Hi, I tried to run the forw

Hi,

I tried to run the forwardStep tutorial, but the Courant number is getting very big fast. So I tried to decrease the timestep. This resulted in bigger Courant numbers faster than before. How...

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