For filtration/separation-type applications, phenomena of particle deposition and buildup on selected surfaces are implemented based on the critical impact velocity algorithm. If the particle velocity is below the user-specified critical impact velocity, the particle will adhere to the wall upon impact. If the particle velocity is above the critical impact velocity, the particle will rebound off the wall. The deposited particles are assigned zero velocities and accelerations.

The deposition model also allows for detachment of the particle if the fluid force exceeds a critical user-specified limit.