Abstract
Abstract
The motion of particles induced by a pendant charged droplet was studied. Forces on particles during attraction were analyzed quantitatively. It was found that part of the particles bounced off the droplet surface after physical contact, which was related to their impact angle: nearly half of them rebounded when their impact angle was <85°. This could cause the decline of collection efficiency of the charged droplet. A two-dimensional numerical model was established to estimate the impact angle of particles influenced by the air flow. Numerical results showed that impact angle of particles increased by increasing the Coulomb number Kc or decreasing the Stokes number St. It was predicted that collection efficiency of a charged droplet was lower than an uncharged case at the conditions of Stokes number St > 6.1 and Coulomb number Kc = 1.
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