eulerian-eulerian or eulerian granular
 

Hello all,

I'm trying to simulate gas-solid and liquid-solid flow with Euerian-Euerian approach. The solid phase is the secondary phase.

However, I get confused when I setting the secondary phase which is when do we need to click the granular option under the phase material. What will happen if I don't click the granular option and run the simulation.

Also, what about the packed bed under the granular option?

Thanks