[Yassin]

Hey,

I am trying to include particle-particle interaction in DPM by using UDF.

The collision model is based on preserving momentum between particles. The model is simplified by saying that the angular velocity of the particles is 0 and that the collisions are non-sliding. The velocities are then reduced to the following expressions (as mentioned in image 1).
up1,vp1,wp1: particle velocity for particle 1.
up2,vp2,wp2: particle velocity for particle 2.

The collision model is applied only for two particles that are in the same cell.


I can use macro TP_DIAM(p), TP_POS(p), and TP_VEL(p) for getting particle diameter, position, and velocity over all cells.

However, If I have two particles in the same cell, how do I differentiate between their position, velocity, and diameter.?.

Also, how do I know there are two particles in the same cell.

Any help Please.

Thanks.