Hello,
I am using bigParticle voidFraction model. For that grid size and particle size are equivalent. In couplingDictionary parameters are gives as:
porosity 64.0
weight 0.051625
cfdemCoupling runs nicely but per cell voidfraction doesn't change that much. When I have looked inside the source code, particle volume is multiplied by weight. I didn't get why volume is weighted by weight parameter? For the weight I am giving it reduces the particle volume so I have tried with weight of 64 but with this simulation doesn't run, courant number reaches very high.
Regards,
Govind Sharma