[Engineers]

Hello all,

I've been trying for a while to combine the pitching and heaving motion using either icoDyMIbFoam or icoDyMFoam solvers with little success. I'm using Foam-ext-3.2 and I have successfully ran the pitching and heaving cases separately.

Here's what I have tried:

[[1]] Case I

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | foam-extend: Open Source CFD |
| \\ / O peration | Version: 3.2 |
| \\ / A nd | Web: http://www.foam-extend.org |
| \\/ M anipulation | For copyright notice see file Copyright |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dynamicFvMesh solidBodyMotionFvMesh;

solidBodyMotionFvMeshCoeffs
{
solidBodyMotionFunction multiMotion;
motionFunctions
(
trisurf
{

solidBodyMotionFunction multiMotion;
multiMotionCoeffs
{
PitchingMove
{
solidBodyMotionFunction rotatingOscillation;
rotatingOscillationCoeffs
{
origin (0 0 0);
amplitude (0 0 8);
amplitude0 (0 0 0);
period 1.3918;
}
}
FlappingMove
{
solidBodyMotionFunction linearOscillationCoeffs;
linearOscillationCoeffs
{
origin (0 0 0);
amplitude (0 0.15 0);
amplitude0 (0 0 0);
period 1.3918;
}
}
}
}
);
motionSolverLibs ( "libfvMotionSolvers.so" );
}



// ************************************************** *********************** //

However, this fails with the error that:

--> FOAM FATAL ERROR:
Unknown solidBodyMotionFunction type multiMotion

Valid solidBodyMotionFunctions are :

5
(
SDA
SKA
linearOscillation
rotatingOscillation
translation
)


From function solidBodyMotionFunction::New( const dictionary& SBMFCoeffs, const Time& runTime)
in file solidBodyMotionFunction/newSolidBodyMotionFunction.C at line 54.

FOAM exiting

[[2]] Case II

I've tried using SDA to run this, but I cannot get the Roll to be zero. I would only need pitching (sway) and heaving motion.

I am for sure doing something wrong, but I don't seem to be getting anywhere with trial and error here. Any help would be greatly appreciated.

Thanks,

AH

[amirhosseintaran]

Hi AH,
Did you found any solution for it so far ?
Regards.
Amir

[GrpOne123]

Hello, I make the icoDyMIbFoam from pimpleDyMIbFoam but when I calculate a toturial it will take some problem about pcorr solution singularity.
Can you tell me how did you make the icoDyMIbFoam?