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problem with torque using sixDoFRigidBodyMotion

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Old   February 18, 2015, 10:33
Default problem with torque using sixDoFRigidBodyMotion
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Dear all,

I'm using waveDyMFoam solver with sixDoFRigidBodyMotion option, to study a rotating device moving in water.
I would impose a constant torque to the shaft: I added the line with torque string in the "dynamicMeshDict" file , but it seems that the defined torque is used only as an initial condition and not as a constant value imposed.
Anyone know the reason of the error and how to fix it?

Many thanks in advanced.


Code:
sixDoFRigidBodyMotionCoeffs
{
    patches            (rotatingWalls);
    innerDistance           0.3;
    outerDistance           1;

    centreOfMass            (5.0 -0.14 0.0);
    mass                     0.000432;
    momentOfInertia         (0.0 0.00000023 0.00000023);
    orientation
   (
    1 0 0
    0 1 0
    0 0 1
    ); 

    torque             (0 0 1);
    rhoName                 rhoInf;
    rhoInf                  1000;
    report                  on;
    accelerationRelaxation     0.08; // 0.1;
    value                   uniform (0 0 0);
    g (0 -9.8 0);

    constraints
    {
    rotationAxis
        {
        sixDoFRigidBodyMotionConstraint axis;
        axis                      (0 0 1);
        }
    fixedPoint
    {
            sixDoFRigidBodyMotionConstraint point;
        centreOfRotation        (5.0 -0.1 0.0);
    }
    }
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