Filtration Efficiency of Non-Uniform Fibrous Filters

Dahua Shou, Jintu Fan, Heng Zhang, Xiaoming Qian, Lin Ye

    Research output: Journal article publicationJournal articleAcademic researchpeer-review

    26 Citations (Scopus)

    Abstract

    Although theoretical models of the filtration efficiency of fibrous filters are typically based on a single type of fiber in an ordered array, many actual fibrous filters comprises fibers that are inherently randomly distributed. It is desirable to be able to estimate the filtration efficiency of such non-uniform fibrous filters from their composition arrangement and the filtration property of individual fibers. Toward that end, we approximate the filter system as a series of cells comprising individual fibers with random distribution, deviating from the homogeneity assumption in the classical models. With better characterization of the filter structure based on the Voronoi diagram, we theoretically revisit filtration efficiency by the top-down (TD) approach and the bottom-up approach. The proposed models are compared with the existing experimental and numerical results under different fiber volume fractions, indicating the high accuracy of the TD model for the filtration of submicron aerosol particles. The influence of the degree of randomness of fiber distribution on filtration efficiency is also quantified.Copyright 2015 American Association for Aerosol Research

    Original languageEnglish
    Pages (from-to)912-919
    Number of pages8
    JournalAerosol Science and Technology
    Volume49
    Issue number10
    DOIs
    Publication statusPublished - 3 Oct 2015

    ASJC Scopus subject areas

    • Environmental Chemistry
    • General Materials Science
    • Pollution

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