Dear all,
I am a new comer in CFDEM, recently I just used CFDEM to simulate the suspended sediment transport, but I always get some particles' velocity larger than the fluid velocity, it that because the time step of DEM side, or I use a wrong model? And in most of time, how can we decide the time step of the DEM side?
Thank you for your help!
Best Wishes!
my couplingProperties is:
ModelType B; // A or B
couplingInterval 10;//CFD timestep 0.0001, DEM timestep 0.00001
voidFractionModel divided;//centre;//bigParticle;//
locateModel engine;//standard;
meshMotionModel noMeshMotion;
regionModel allRegion;
IOModel basicIO; //trackIO; //
probeModel off;
dataExchangeModel twoWayMPI;//twoWayFiles;//oneWayVTK;//
averagingModel dense;//dilute;//
clockModel off; //standardClock;//
smoothingModel constDiffSmoothing; //off;//
//useDDTvoidfraction;
forceModels
(
//DiFeliceDrag
SchillerNaumannDrag
//KochHillDrag
//MeiLift
//virtualMassForce
//gradPForce
//viscForce
Archimedes
);
momCoupleModels
(
implicitCouple
);
turbulenceModelType LESProperties;//RASProperties;//