An approach for evaluating aerosol particle deposition from a natural convection flow onto a vertical flat plate.
An approach through numerical integration for evaluating aerosol particle deposition onto a vertical flat plate is proposed. The airflow was based on the assumption of a two-dimensional, incompressible and steady state laminar flow driven by a buoyancy force. The mechanisms of particle deposition were coupled from natural convection, Brownian diffusion, thermophoresis and electrophoresis due to constant electric strength. This approach demonstrated an easier method of prediction and produced a very good agreement with the thermophoresis exact solution. Results described the role of thermophoretic and electrophoretic forces on particle deposition. The thermophoresis effect was predicted to be particularly important for particles of d(p)>/=0.1 microm moving toward a cold surface or away from a hot surface at a given temperature gradient. The electrophoresis effect dominates the deposition of submicron particles.
Tsai
R
R
Department of Mechanical Engineering, Chung Yuan Christian University, Chung Li 320, Taiwan. rueyyih@cycu.edu.tw
Lin
Z Y
ZY
D000336:Aerosols / Q000493:pharmacokinetics*; D016902:Air Pollution, Indoor / Q000032:analysis*; D004586:Electrophoresis; D004784:Environmental Monitoring / Q000379:methods; D008962:Models, Theoretical; D013696:Temperature
D000336:Aerosols