New Perspectives on Rebound and Reentrainment Processes

Rebound and reentrainment processes are briefly reviewed. They are discussed in light of a new simulation of incomplete particle bounces. In the simulation, par· ticle trajectories are followed after bouncing with insufficient energy to escape the surface adhesion well. A hypothesized process, rebound-reentrainment, is pre-dicted to be important only for large particles (> 10 fLm radius), or even larger sized particles if the coefficients of restitution are small compared to glass (j.e., < 0.95). The Reeks et al. (1988) theory does not appear well supported for small (micrometer size) particles