Dynamic Mesh

Moving Cell Zone

The dynamicMeshDict file for the Moving Cell Zone is as follows.

dynamicFvMesh    dynamicMotionSolverListFvMesh;
motionSolverLibs  ( fvMotionSolvers );
solvers
{
    anyName
    {
        motionSolver solidBody;
        solidBodyCoeffs
        {
             solidBodyMotionFunction multiMotion;
             multiMotionCoeffs
             {
                  motion_name
                  {
                      solidBodyMotionFunction anyMotionFunction];
                      ...
                  }
            }
        }
        cellZone "(anyCellZoneName)";
    }
}

Moving Boundary

The dynamicMeshDict file for the Moving Boundary is as follows.

dynamicFvMesh    dynamicMotionSolverFvMesh;
motionSolverLibs  ( fvMotionSolvers );
motionSolver        displacementLaplacian;
displacementLaplacianCoeffs
{
    diffusivity inverseDistance  
    (
        anyBoundaryName
    );
}

Rigid Body Dynamics

The dynamicMeshDict file for Rigid Body Dynamics is as follows.

dynamicFvMesh    dynamicMotionSolverFvMesh;
motionSolverLibs  ( rigidBodyMeshMotion );
motionSolver        rigidBodyMotion;
rigidBodyMotionCoeffs
{
    solver
    {
        type Newmark; //CrankNicolson;//symplectic;
    }
    accelerationRelaxation 0.1;
    accelerationDamping 1.0;
    bodies
    {
        anyName
        {
            type    rigidBody;
            parent root;
            mass 15.0;
            centreOfMass (0 0 0.25);
            inertia (0.3625 0 0 0.0425 0 0.1625);
            transform  (1 0 0 0 1 0 0 0 1) (0.5 0.45 0.1);
            patches     ( floatingObject );
            innerDistance 0.05;
            outerDistance 0.35;
            joint
            {
            }
        }
    }
}        
restraints
{
}

Motion Functions of dynamicMeshDict

Rotating motion

The motion definition of dynamicMeshDict is as follows.

multiMotionCoeffs
{
    anyMotionName
    {
        solidBodyMotionFunction rotatingMotion;
        rotatingMotionCoeffs
        {
            origin   (0 0 0);
            axis     (0 0 1);
            omega 2;
        }
    }
}

Rotating Oscillation motion

The motion definition of dynamicMeshDict is as follows.

multiMotionCoeffs
{
    anyMotionName
    {
        solidBodyMotionFunction oscillatingRotatingMotion;
        oscillatingRotatingMotionCoeffs
        {
            origin           (0 0 0);
            amplitude    (0 0 1);
            omega         2;
        }
    }
}

Linear Translation motion

The motion definition of dynamicMeshDict is as follows.

multiMotionCoeffs
{
    anyMotionName
    {
        solidBodyMotionFunction linearMotion;
        linearMotionCoeffs
        {
            velocity    (0 0 1);
        }
    }
}

Linear Oscillation motion

The motion definition of dynamicMeshDict is as follows.

multiMotionCoeffs
{
    anyMotionName
    {
        solidBodyMotionFunction oscillatingLinearMotion;
        oscillatingLinearMotionCoeffs
        {
            amplitude    (0 0 1);
            omega         2;
        }
    }
}

Manual Position

The motion definition of dynamicMeshDict is as follows.

multiMotionCoeffs
{
    anyMotionName
    {
        solidBodyMotionFunction tabulated6DoFMotion;
        tabulated6DoFMotionCoeffs
        {
            CofG    (0 0 1);
            timeDataFileName "<constant>/fileName";
        }
    }
}

Prescribed Motion

When it is a Moving Boundary, the prescribed motion is defined as follows in the pointDisplacement file in folder 0.

anyBoundaryName
{
    type            solidBodyMotionDisplacement;
    value           uniform (0 0 0);
    solidBodyMotionFunction multiMotion;
    multiMotionCoeffs
    {
           .... 
    }
}