Gran cohesion washino/capillary/viscous implementation

Hi All,

I want to use cohesion model washino/capillary/viscous for the simulation.

I have four different types of particles in the simulation. And, I want to apply cohesion to only two types of particles. For the remaining two types of particles, I want to apply only gran model hertz (without cohesion).

Can someone please help me, how to implement this?

Any help will be much appreciated.

Thanks,
Narendra