Publication Date

6-1-2020

Document Type

Article

Publication Title

Environmental Engineering Research

Volume

25

Issue

3

DOI

10.4491/eer.2019.058

First Page

439

Last Page

445

Abstract

In the estimation of the aerosol single fiber efficiency using fibrous filters, there is a size range, where the particles penetrate most effectively through the fibrous collectors, and corresponding minimum single fiber efficiency. For small particles in which the diffusion mechanism is dominant, the Cunningham slip correction factor (Cc) affects the single fiber efficiency and the most penetrating particle size (MPPS). Therefore, for accurate estimation, Cc is essential to be considered. However, many previous studies have neglected this factor because of its complexity and the associated difficulty in deriving the appropriate parameterization particularly for the MPPS. In this study, the expression for the MPPS, and the corresponding expression for the minimum single fiber efficiency are analytically derived, and the effects of Cc are determined. In order to accommodate the slip factor for all particle-size ranges, Cc is simplified and modified. Overall, the obtained analytical expression for the MPPS is in a good agreement with the exact solution.

Funding Number

NRF-2016M1A5A1901786

Funding Sponsor

Ministry of Education

Keywords

Aerosol single fiber efficiency, Cunningham slip correction factor, Fibrous collector, Minimum single fiber efficiency, Most penetrating particle size

Comments

This is the Version of Record and can also be read online here.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 3.0 License

Department

Meteorology and Climate Science

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