Particle deposition behavior simulated by the stochastic method

The deposition of colloidal particles onto the collector surface in two-dim ensional flows is studied using the Brownian dynamics simulation method. By using the Kuwabara model to characterize the flow field, the effects of th e total interaction energy curves of various shapes on the collection effic iencies of Brownian particles are examined. The simulation results are test ed against published experimental data of the deposition rates of Brownian particles, for the cases of the repulsive double layer interactions (Elimel ech, M., O'Melia, R.C., 1990. Effect of particle size on collision efficien cy in the deposition of Brownian particles with electrostatic energy barrie rs. Langmuir, 6 (6) 1153-1163.) and of the attractive double layer interact ions (Elimelech, M., 1991. Kinetics of capture of colloidal particles in pa cked beds under attractive double layer interactions. J. Colloid Interface Sci., 146 (2), 337-352). The simulation results with the Brownian diffusion taken into account in the particle deposition mechanisms give a better fit with these experimental data than that obtained without considering the Br ownian diffusion. (C) 1999 Elsevier Science B.V. All rights reserved.