[Pieter van Halem]

Hi all I currently have a working setup of a block oscillating in a fluid. I rotate the block with a dynamicMeshDict. I am intrested to get the forces that result from the oscillation on the block. However the oscillation starts directly. This results in unrealistic start-up effects. To counter this I want to gradually build up the forced motion. Does anybody know how to do that?

I rotate my entire mesh with the following dynamicMeshDict:

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1806 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dynamicFvMesh dynamicMotionSolverFvMesh;
motionSolver solidBody;
solidBodyMotionFunction oscillatingRotatingMotion;
oscillatingRotatingMotionCoeffs
{
origin (0 0 0);
amplitude (5.73 0 0);
omega 4.1888;
}
motionSolverLibs ( "libfvMotionSolvers.so" );

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