Abstract
where h is the rate of shear. This study may be used to analyze particle motion in the viscous sublayer in turbulent flows, with application to particle deposition. The results show that the lift force has a strong effect on the deposition of aerosol particles from turbulent flows onto surfaces (Fichman et al, 1988). The motion of a particle in vertical flow is subject to centrifugal forces in addition to drag and lift. These centrifugal forces modify the condition for the instability of particle motion. The analysis of vertical flow assumes locally simple shear flow, and the criterion for instability is (Pnueli et al, 1997):
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