NEW PERSPECTIVES ON REBOUND AND REENTRAINMENT PROCESSES

Rebound and reentrainment processes are briefly reviewed. They are dis cussed in light of a new simulation of incomplete particle bounces. Zn the simulation, particle trajectories are follow-ed after bouncing wi th insufficient energy to escape the surface adhesion well. A hypothes ized process, rebound-reentrainment, is predicted to be important only for large particles (>10 mu m radius), or even larger sized particles if the coefficients of restitution are small compared to glass (i.e., much less than 0.95). The Reeks ct al. (1988) theory does not appear well supported for small (micrometer size) particles.