THEORETICAL SIMULATION OF THE COLLECTION EFFICIENCIES OF BROWNIAN PARTICLES

The deposition problem of colloidal particles onto the collector surfa ce in two-dimensional flows is studied using the Brownian dynamics sim ulation method. With the Kuwabara model for characterizing the flow fi eld, the effects of the total interaction energy curves of various sha pes on the collection efficiencies of Brownian particles are examined. Comparing with the experimental data of measuring the deposition rate s of Brownian particles, it is found that the deposition model of the present paper can give a better simulation result than the previous co nvective diffusion model for the experiment of the repulsive double la yer interactions IM. Elimelech and R.C. O'Melia, Langmuir, 6 (1990) 11 53], and an opposite result is obtained for the experiment of the attr active double layer interactions EM. Elimelech, J. Colloid Interface S ci., 146 (1991) 337]. (C) 1997 Elsevier Science B.V.