Reply To: Coarse graining in Rocky

[Jackson Gomes]

Dear Saeed,

The final parcel size is what Rocky will use to perform the averaging calculations to send the Solid Volume Fraction to the CFD solver.

CGM is always a trade-off between computational speed and accuracy. Please check whether your CGM factor is too large - general recommendation is for the smallest scaled up particle to be still at least an order of magnitude smaller than the smallest characteristic length of the domain.

The porosity defined in Rocky’s particle tab refers to the internal porosity of the particles (proportion of empty space within a material).