[Redrakham]

I am doing an OpenFoam case with two cylinders in tandem arrangement with overset mesh- a background mesh, one refinement zone and two cylinder mesh. I am using overPimpleDyMFoam but got this error: Attempt to cast type dynamicOversetFvMesh to type dynamicMotionSolverFvMesh.

This is my dynamicMeshDict:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: plus-overset |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

motionSolverLibs ("libsixDoFRigidBodyMotion.so");
dynamicFvMesh dynamicOversetFvMesh;
/*
dynamicOversetFvMeshCoeffs
{
// layerRelax 0.3;
}
*/

//motionSolverLibs ( "libfvMotionSolvers.so" );
//
//solver displacementLaplacian;
//
//displacementLaplacianCoeffs
//{
// diffusivity uniform 1;
//}


solver sixDoFRigidBodyMotion;

sixDoFRigidBodyMotionCoeffs
{
patches (cylinder1);
patches (cylinder2);


innerDistance 100.0;
outerDistance 101.0;

mass 1.5707963;
centreOfMass (0 0 0);
momentOfInertia (1 1 1);
orientation
(
1 0 0
0 1 0
0 0 1
);
velocity (0 0 0);
acceleration (0 0 0);
angularMomentum (0 0 0);
torque (0 0 0);

g (0 0 0);
rho rhoInf;
rhoInf 1;
accelerationRelaxation 0.9;
accelerationDamping 0.95;
report on;
reportToFile on;
solver
{
type Newmark;
}

constraints
{
yLine_1
{
sixDoFRigidBodyMotionConstraint line;
direction (0 1 0);
}

noAxis_1
{
sixDoFRigidBodyMotionConstraint orientation;
}
}

restraints
{
verticalSpring_1
{
sixDoFRigidBodyMotionRestraint linearSpring;

anchor (0 2 0);
refAttachmentPt (0 0 0);
stiffness 1.72257;
damping 0;
restLength 2;
}
}

}
************************************************** *********************** //

[Redrakham]

This is my case files..

[thanosniotis]

Hello there,

I do have the same problem with the overset. My case runs with version v1906 but not with version v1912. If you find any solution please post it.

Best regards,
Athanasios Niotis

[Redrakham]

You can refer to this thread: multiple patches in toposet and setfields overset problem for sixdofrigidbodymotion.
But the problem of writing the sixdofrigidbodystate still remains. I work around this problem by 'awk' command from log.solver.