BROWNIAN PARTICLE DEPOSITION IN A DIRECTLY SIMULATED TURBULENT CHANNEL FLOW

Diffusion of submicron particles in a simulated turbulent channel flow field is studied. The turbulent flow velocity field is generated by a direct numerical integration of the Navier-Stokes equation with the p seudospectral method. The equation of motion of particles including th e Brownian effects is used and ensembles of particle trajectories are numerically evaluated and statistically analyzed. A uniform initial co ncentration of particles is used in the analysis. Effects of size on p article dispersion and wall deposition processes are studied. The resu lts are compared with the existing models for the submicron particle d eposition rate.