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|Title:||Numerical study of particle collection by single water droplets||Authors:||Viswanathan, S.||Issue Date:||Nov-1999||Citation:||Viswanathan, S. (1999-11). Numerical study of particle collection by single water droplets. Industrial and Engineering Chemistry Research 38 (11) : 4433-4442. ScholarBank@NUS Repository.||Abstract:||Particle collection efficiencies of water droplets were calculated by considering thermophoresis, diffusiophoresis, inertial impaction, wake capture, and effects of drop deformation. The computations were carried out for a droplet temperature of 10 °C with saturated gas temperatures of 20, 35, 65, and 95 °C. The temperature, water vapor, and velocity distributions around the collector were determined by direct numerical integration of the appropriate governing partial differential equations using a convenient orthogonal grid generation technique. The investigation shows the following: deposition of fine particles can be significantly enhanced by phoretic forces; flux deposition of fine particles can be related to Reynolds number through the proportionality, E(flux) ∞ Re-0.78; the flux deposition of fine particles on the rear of the collector is significant for low Reynolds numbers; wake capture is relatively insignificant; drop deformation can improve the collection of larger particles by inertial impaction and of smaller particles as a result of increased hydrodynamic effects on such particles.||Source Title:||Industrial and Engineering Chemistry Research||URI:||http://scholarbank.nus.edu.sg/handle/10635/92181||ISSN:||08885885|
|Appears in Collections:||Staff Publications|
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