The aerosol penetration through an electret fibrous filter
Jiang Wei(姜伟)a) b)†, Cheung Chun-Shun(张镇顺)a), Chan Cheong-Ki(陈昌麒)c), and Zhu Chao(朱超)d)
a Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China; b College of Sciences, Shenyang University of Technology, Shenyang 110023, China; c Department of Applied Mathematics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, SAR, China; d Department of Mechanical Engineering, New Jersey Institute of Technology, USA
Abstract The aim of this paper is to present a theoretical study of the aerosol penetration through an electret fibrous filter, using a numerical approach. The aerosol sizes considered in this study were in the submicron range, and in the numerical model, the conventional mechanical mechanisms (impaction, interception, diffusion and gravitationally settling) were taken into consideration along with the electrostatic mechanisms, including the Coulombic and dielectrophoretic effects. The aerosol penetration through an electret fibrous filter is heavily dependent on the aerosol penetration of a single fibre. The aerosol penetration through a single electret fibre under various filtration conditions was calculated. The effects of aerosol diameter, aerosol and fibre charge state, face velocity, packing density and aerosol dielectric constant on the aerosol penetration were investigated.
Received: 19 January 2006
Revised: 02 March 2006
Accepted manuscript online:
Fund: Project supported by the Hong Kong Polytechnic University (Grant No GU-037).
Cite this article:
Jiang Wei(姜伟), Cheung Chun-Shun(张镇顺), Chan Cheong-Ki(陈昌麒), and Zhu Chao(朱超) The aerosol penetration through an electret fibrous filter 2006 Chinese Physics 15 1864
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