CFD Online Discussion Forums - oscillatingRotatingMotion: simulation time change with omega and amplitude values

hello,

I work on a simulation with pimpleDyMFoam for an oscillating and rotating motion.
I have choose these parameters in the controlDict

Code:

application     pimpleDyMFoam;



startFrom       startTime;



startTime       0;



stopAt          endTime;



endTime         1;



deltaT          1e-2;

writeControl    adjustableRunTime;

writeInterval   0.01;



////- For testing with moveDynamicMesh

//deltaT          0.01;

//writeControl    timeStep;

//writeInterval   1;



purgeWrite      0;



writeFormat     binary;



writePrecision  6;



writeCompression off;



timeFormat      general;



timePrecision   6;



runTimeModifiable false;



adjustTimeStep  no;



maxCo           2;

when I run pimpleDyMFoam, the run is interrupted with this kind of error:

Code:

Courant Number mean: 616728 max: 3.53165e+09

Time = 0.07                                 



AMI: Creating addressing and weights between 19452 source faces and 19984 target faces

AMI: Patch source sum(weights) min/max/average = 0.50888, 1.3735, 1.00185             

AMI: Patch target sum(weights) min/max/average = 0, 1.38576, 0.995279                 

PIMPLE: iteration 1                                                                   

smoothSolver:  Solving for Ux, Initial residual = 0.61257, Final residual = 0.0523612, No Iterations 2

smoothSolver:  Solving for Uy, Initial residual = 0.944341, Final residual = 0.0355865, No Iterations 2

smoothSolver:  Solving for Uz, Initial residual = 0.781761, Final residual = 0.0242732, No Iterations 2

#0  Foam::error::printStack(Foam::Ostream&) in "/Software/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so"                                                                                                                   

#1  Foam::sigFpe::sigHandler(int) in "/Software/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so" 

#2  ? in "/lib64/libc.so.6"                                                                                                 

#3  Foam::divide(Foam::Field<double>&, double const&, Foam::UList<double> const&) in "/Software/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so"                                                                             

#4  ? in "/Software/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/pimpleDyMFoam"                              

#5  Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> > Foam::operator/<Foam::fvPatchField, Foam::volMesh>(Foam::dimensioned<double> const&, Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> > const&) in "/Software/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/pimpleDyMFoam"                                   

#6  ? in "/Software/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/pimpleDyMFoam"                              

#7  __libc_start_main in "/lib64/libc.so.6"                                                                                 

#8  ? in "/Software/OpenFOAM/OpenFOAM-v1606+/platforms/linux64GccDPInt32Opt/bin/pimpleDyMFoam"                              

Floating point exception (core dumped)

my first question is: someone know what's does this error means?

and after if I change the omega and the amplitude values in the dynamicMeshDict

Code:

dynamicFvMesh   solidBodyMotionFvMesh;



motionSolverLibs ( "libfvMotionSolvers.so" );



solidBodyMotionFvMeshCoeffs

{

    cellZone        capsule_zone;



    solidBodyMotionFunction  oscillatingRotatingMotion;

    oscillatingRotatingMotionCoeffs

    {

        origin      (0 0 0);

        amplitude        (1.5 0 0);

        omega       2; // rad/s

    }

}

this error appears at a different simulation time. For example for amplitude = 1.5 and omega =2 the error appears at 0.07 time step. For amplitude = 3 and omega =6 the error appears at 0.03.

so my second question is: someone know why the omega and amplitude values have an impact on the time simulation?

Thanks in advance for your help