Part II: Theoretical Analysis.
Three phenomena involved in the perikinetic coagulation process were studied with regard to their ability to account for the influence of gravity on the coagulation rate: (1) surface charge effects on the pressure in the gap between two approaching particles, through the streaming potential generated by the squeezing flow; (2) free convection induced by temperature changes in the surroundings; (3) surface roughness and hydration force effects on the interaction force between two particles. In a separate paper flow interactions between two identical spheres are shown to be insufficient to explain the influence of gravity on coagulation rate. Of these phenomena studied, a combination of surface roughness and free convection can explain the influence of gravity on coagulation. Copyright 1998 Academic Press.
Department of Chemical Engineering, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
R
Folkersma
HN
Stein