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Advice for waveFoam, using exported stl meshes

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Old   March 31, 2016, 00:03
Default Advice for waveFoam, using exported stl meshes
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Chia
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All is fine and running, BUT, when I double check my wave elevation results, the wave elevation results are fishy, and when I went to look at paraFoam, i found out that the wave doesn't move an inch.

Commands used
1) blockMesh
2) surfaceFeatureExtract
3) snappyHexMesh -overwrite
4) setWaveParameters
5) setWaveField
6) waveGaugesNProbes (to set wave probes)
7) decomposePar
8) nohup mpirun -np 60 waveFoam -parallel 2>&1 | tee log.waveFoam

Wavesproperties.input

seaLevel -24.0;

relaxationNames ( inlet outlet );

initializationName outlet;

inletCoeffs
{
waveType stokesFifth;
stokesDrift 0.0;
Tsoft 15;
depth 336;
period 15.56;
direction ( 1 0 0 );
phi 0;
height 30;
waveNumber (0.01574 0 0);
omega 0.4038;

relaxationZone
{
relaxationScheme Spatial;
relaxationShape Rectangular;
beachType Empty;
relaxType INLET;
startX (-800 -168 -360);
endX (-400 168 120 );
orientation ( 1 0 0 );
}
}

outletCoeffs
{
waveType stokesFifth;
stokesDrift 0.0;
Tsoft 15;
depth 336;
period 15.56;
direction ( 1 0 0 );
phi 0;
height 30;
waveNumber (0.01574 0 0);
omega 0.4038;

relaxationZone
{
relaxationScheme Spatial;
relaxationShape Rectangular;
beachType Empty;
relaxType OUTLET;
startX (400 -168 -360 );
endX (800 168 120 );
orientation ( 1 0 0 );
}
}

Any help is appreciated! thanks!
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Old   March 31, 2016, 22:08
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Maoyanjun
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Hello Chia:
sorry for can't help you.But I have a question ask for you.I change the default seaLevel 0.0 to 1.0. But it goes wrong.the error information is"keyword seaLevelAsReference is undefined in dictionary "/home/maozhuxi/OpenFOAM/maozhuxi-2.4.0/applications/utilities/waves2Foam/tutorials/waveFoam/wavestationstructure/constant/waveProperties". The second problem is when I use snappyHexMesh to create a 2D mesh, I create the stl model in negtive axis,but when I view it in paraFoam,It always in the positive axis. so if I set the seaLevel 0.0. I can't put the model in the water.
Have you ever meet these problems.or could you give me some suggestions.
Thanks

Last edited by Maoyanjun; March 31, 2016 at 22:18. Reason: replenish
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Old   April 3, 2016, 22:16
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Dear Mao,

Initially when i used starccm mesh to export to OpenFOAM, I have similar problems

The mesh in starCCM has different x,y,z orientation,

In my case, StarCCM mesh was set gravity at z level, and my default settings for openfoam, gravity was at y level, so the waves was in a wrong direction,
I would suggest going into paraFoam and look at the coordinates of the wave tank boundaries and as well as your stl mesh coordinates.. did you change your water depth accordingly when you change seaLevel?

P.S - Im a beginner in OpenFOAM , sorry if i cant help much
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Old   April 3, 2016, 22:18
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Chia
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Dear all,

After seeking some external help, its found that, my snappyHexMesh could have been not well defined,

Hence, guess I will have to redo my snappy.. if I could have some additional guidance, I would greatly appreciate it much! Thanks
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Old   April 12, 2016, 22:48
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Quote:
Originally Posted by chia87 View Post
Dear Mao,

Initially when i used starccm mesh to export to OpenFOAM, I have similar problems

The mesh in starCCM has different x,y,z orientation,

In my case, StarCCM mesh was set gravity at z level, and my default settings for openfoam, gravity was at y level, so the waves was in a wrong direction,
I would suggest going into paraFoam and look at the coordinates of the wave tank boundaries and as well as your stl mesh coordinates.. did you change your water depth accordingly when you change seaLevel?

P.S - Im a beginner in OpenFOAM , sorry if i cant help much
Dear Chia,
sorry for reply you late,thanks for your advice.After reading the src.I find in my dev 2.4.0 of Foam.It needs to define a referenceSeaLevel coefficient behind the seaLevel. So after defining it .It works well when I change the seaLevel,Hope that will be useful for other beginners, and hope we can keep in touch and exchange our experience.

Last edited by Maoyanjun; April 12, 2016 at 22:51. Reason: wrong spell
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Old   April 13, 2016, 01:23
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Welcomed! I also managed to solve my problem as well, seems that there is problem with my snappyhexmesh dict,
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