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Annular flume simulation:how to edit two rotating cell zones in dynamicMeshDict?

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Old   March 22, 2023, 03:01
Smile Annular flume simulation:how to edit two rotating cell zones in dynamicMeshDict?
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mil tang
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Dear Foamers,

I'm using OF v9 multiSolidBodyMotionSolver for simulating the annular flume, what I want to do is simulate the sheer ring and annular flume spin at the same time, I referred to what OpenFOAM wiki suggested in section 2.8 multiMotion:https://openfoamwiki.net/index.php/P...sh#multiMotion.
Following what wiki suggested, I setup the dynamicMeshDict as follows, which has been modified slightly in OF v9 style.
code:
dynamicFvMesh dynamicMotionSolverFvMesh;

motionSolver multiSolidBodyMotionSolver;


solidBodyMotionFunction multiMotion;
{

upper_rotation;
{
solidBodyMotionFunction rotatingMotion;
rotatingMotionCoeffs
{
origin (0 0 0);
axis (0 0 1);
omega 3.86; // rad/s
}


bottom_rotation;
{
solidBodyMotionFunction rotatingMotion;
rotatingMotionCoeffs
{
origin (0 0 0);
axis (0 0 1);
omega -1; // rad/s
}

}

then I run pimpleFoam and I found that the Kurang number is completely 0, which looks like the shear ring and the sink are completely stationary and not rotating at the speed I set. Could you please tell me why this happens and how do I set it correctly
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