[soup]

I have spent quite a while looking at openFoam's different solvers and I think icoDyMFOAM will do what I want. However I can't find anything on how to use it.

I hope i'm just missing something but is there someone who could tell me where to look for documentation on icoDyMFOAM. I would also like to know more about dynamicMeshDict. Where can I find out what options are available and what the options do?

Any help is greatly appreciated.

[soup]

Could someone even point me in the direction of the source code that reads in dynamicMeshDict? I have been looking at the source for icoDyMFoam and trying to follow all the #includes but I haven't been able to track it down.

[hjasak]

Not that it's going to do you any good, but the piece of code you are looking for is:

OpenFOAM-1.3/src/dynamicFvMesh/dynamicFvMesh/newDynamicFvMesh.C, line 39.

It then does run-time selection from available dynamic meshes and the story continues in the selected mesh type.

Enjoy,

Hrv

[soup]

Thank you for your reply.

As far as I can tell no documentation exists for icoDyMFoam. Could you please confirm this or do I need to look harder?

You're right that line of code doesn't do me much good. Is there a better way for me to find out how to use dynamicMeshDict to set up a dynamic mesh?

Thanks again

[irc]

Bryan - unfortunately I don't think there is any real documentation - this takes time to produce, I guess, and everyone's busy. As a fellow initiate to dynamic meshes under OF, I can only suggest that you spend some time reviewing the tutorial cases and trawling through the threads on this message board related to dynamic/moving meshes - you should then begin to put the pieces together. When you have a more specific question on how a certain bit works, then you may get more of a response. Good luck!

[dmoroian]

Hello everybody,
I am trying the icoDyMFoam on a very simple case, a solid cube rotating inside a sphere:

From the first time step I get the following error:
lap08 mjukvara-1.3/run> ~/OpenFOAM/OpenFOAM-1.3/applications/bin/linuxAMD64Gcc4DPDebug/icoDyMFoam ./ sliding
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.3 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : /lap08/soft/OpenFOAM/OpenFOAM-1.3/applications/bin/linuxAMD64Gcc4DPDebug/icoDyMF oam ./ sliding
Date : Nov 23 2006
Time : 16:50:24
Host : lap08
PID : 29131
Root : /lap08/soft/OpenFOAM/mjukvara-1.3/run/
Case : sliding
Nprocs : 1
Create time

Create mesh

Selecting dynamicFvMesh mixerFvMesh
void mixerFvMesh::addZonesAndModifiers() : Zones and modifiers already present. Skipping.
Mixer mesh:
origin: (0 0 0)
axis: (0 0 1)
rpm: 10
Reading transportProperties

Reading field p

Reading field U

Reading/calculating face flux field phi


Starting time loop

Courant Number mean: 0 max: 0
deltaT = 5.99995e-06
Time = 5.99995e-06

ICCG: Solving for pcorr, Initial residual = 1, Final residual = 7.39948e-09, No Iterations 91
ICCG: Solving for pcorr, Initial residual = 0.779809, Final residual = 9.59514e-09, No Iterations 85
time step continuity errors : sum local = 3.36793e-19, global = -1.16263e-34, cumulative = -1.16263e-34
BICCG: Solving for Ux, Initial residual = 1, Final residual = 1.48658e-11, No Iterations 1
BICCG: Solving for Uy, Initial residual = 1, Final residual = 1.55559e-11, No Iterations 1
BICCG: Solving for Uz, Initial residual = 1, Final residual = 1.45563e-11, No Iterations 1
ICCG: Solving for p, Initial residual = 1, Final residual = 9.0969e-07, No Iterations 72
ICCG: Solving for p, Initial residual = 0.565172, Final residual = 7.47717e-07, No Iterations 69
time step continuity errors : sum local = 2.05296e-19, global = 4.27936e-34, cumulative = 3.11673e-34


--> FOAM FATAL ERROR : Continuity error cannot be removed by adjusting the outflow.
Please check the velocity boundary conditions and/or run potentialFoam to initialise the outflow.
fixedMassOut: 0.465426 massIn: 0.465426 diff: 3.44336e-12

From function
adjustPhi(surfaceScalarField& phi, const volVectorField& U,const volScalarField& p
in file cfdTools/general/adjustPhi/adjustPhi.C at line 108.

FOAM exiting

How 3.4e-12 can be too large error? Any sugestions on how to proceed further?

Dragos

[vinz]

Hi Dragos,

I'm also trying to use icoDymFOAM solver at this time.
As far as I know, such errors are occuring because of boundary conditions problems, especialy for the pressure. So check that way, andd try different possibilities.
Hope it was helpful,

Vincent

[dmoroian]

Hmm,
This is strange, because I have only wall boundaries. So the only pressure condition I can think of is zeroGradient.

Dragos