[RainMoonCloud]

Hello everyone,

I'm a newcomer to OpenFOAM, and I'm planning to simulate the 2D Vortex-Induced Vibration (VIV) phenomenon of an ellipse using the overPimpleDyMFoam solver in OpenFOAM V2306. In my setup, I want to allow the ellipse to freely oscillate in the vertical inflow direction and simultaneously apply a constant rotational angular velocity to the ellipse. I plan to use sixDoFRigidBodyMotion to simulate the free oscillation and rotatingMotion under solidBody to simulate the constant rotational angular velocity. However, I'm struggling to integrate these two motions seamlessly.

Below is my dynamicMeshDict file settings:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2306                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dynamicFvMesh       dynamicOversetFvMesh;

solver          multiSolidBodyMotionSolver;

solvers
{
    viv
    {
        motionSolver sixDoFRigidBodyMotion;
        patches         (cylinder);
        innerDistance   100;
        outerDistance   101;
        report          on;

        mass            2;
       centreOfMass    (0.0 0.0 0.0);
       momentOfInertia (1 1 1);

       g               (0 0 0);
       rho             rhoInf;
       rhoInf          1;

       solver
       {
           type Newmark;
       }

     constraints
     {

      yLine
      {
         sixDoFRigidBodyMotionConstraint   line;
         direction ( 0 1 0);
      }

      rotation
      {
          // sixDoFRigidBodyMotionConstraint orientation;
          sixDoFRigidBodyMotionConstraint axis;
          // centreOfRotation (0 0 0);
          axis (0 0 1);
      }
     }
    }
    overset_internal
    {
        motionSolver solidBody;
        solidBodyMotionFunction rotatingMotion;
        rotatingMotionCoeffs
        {
            origin      (0. 0. 0.);
            axis        (0 0 1);
            omega       1.570;
        }
    }
}

Any guidance or suggestions on how to combine sixDoFRigidBodyMotion for free oscillation and rotatingMotion for constant rotational motion in my case would be greatly appreciated.

Thank you!