The experimental and simulation investigation of the dynamic characteristic of submicron-scale aerosol in high-voltage electric field by a visualization method

Yong Zhu; Shanlong Tao; Chen Chen; Jiahua Liu; Mingxia Chen; Wenfeng Shangguan

doi:10.1016/j.jhazmat.2021.126227

The experimental and simulation investigation of the dynamic characteristic of submicron-scale aerosol in high-voltage electric field by a visualization method

J Hazard Mater. 2021 Aug 15:416:126227. doi: 10.1016/j.jhazmat.2021.126227. Epub 2021 May 26.

Authors

Yong Zhu¹, Shanlong Tao¹, Chen Chen¹, Jiahua Liu¹, Mingxia Chen¹, Wenfeng Shangguan²

Affiliations

¹ Research Center for Combustion and Environmental Technology, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
² Research Center for Combustion and Environmental Technology, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China. Electronic address: shangguan@sjtu.edu.cn.

PMID: 34492981
DOI: 10.1016/j.jhazmat.2021.126227

Abstract

The high-voltage electric field can effectively capture charged aerosols and has the effect of killing microbial aerosols simultaneously. In this article, an innovative visualization method for investigating the dynamic characteristic of submicron-scale aerosol particles in the high-voltage electric field is developed. Based on reasonable working principles and reliable experimental schemes, the movement of submicron-scale aerosol particles is observed and visualization images in different working conditions are photographed. Besides, with the aid of numerical method and solution of related equations, simulation researches on flow field distribution, electrostatic field characteristics, particle charging and motion behavior characteristics are also carried out. Visualization results prove the linear motion law of aerosol particles in an electric field of 0-3 kV/cm unit. As for 1 µm diameter particle, its migration velocity in 1 kV/cm electric field is measured as 0.016 m/s and 0.019 m/s after positive and negative charging of 1.5 kV voltage, respectively. A reliable calculation formula (η=(V_jq_pL_j)/(3πμD²u_xd_p)) for predicting collection efficiency is derived and established based on actual particle migration velocity. The researches on the migration and capture law of submicron-scale aerosol in the high voltage electric field gives a key reference for the development and design of efficient removal of microbial aerosol and air purification equipment.

Keywords: Calculation formula; Dynamic characteristic; High-voltage electric field; Submicron-scale aerosol; Visualization method.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Aerosols
Electricity*
Particle Size
Static Electricity

Substances

Aerosols