Effect of mesoscale inhomogeneity and fibers size distribution on the initial stage of deep-bed filtration process

Rafał Przekop , Anna Izabella Jackiewicz-Zagórska

Abstract

Aerosol filtration in fibrous filters is one of the principal methods of accurate removal of particulate matter from gas stream. The classical theory of depth filtration in fibrous structures is based on the assumption of existence of single fiber efficiency, which may be used for calculation of overall efficiency of the filter. There are several reasons for inappropriate estimation of the single fiber efficiency including assumption of negligible effect of presence of neighbouring fibers and perpendicular orientation of the homogenous fibers in filter structure. The aim of this work is to investigate influence of mesoscale inhomogeneity on fibrous filters performance using Digital Fluid Dynamics in models of filters differed by internal structure and to compare obtained results with experimental data. The influence of both, irregularity of structure and fiber size distribution on macroscopic filter performance (initial fractional efficiency, initial pressure drop and their time evolutions) is presented. The neglection of fiber size distribution in theoretical models of filtration efficiency leads to the underestimation of both, filtration efficiency and pressure drop.
Author Rafał Przekop (FCPE / CIPE)
Rafał Przekop,,
- Chair of Integrated Process Engineering
, Anna Izabella Jackiewicz-Zagórska (FCPE / CIPE)
Anna Izabella Jackiewicz-Zagórska,,
- Chair of Integrated Process Engineering
Journal seriesJournal of Aerosol Science, ISSN 0021-8502, e-ISSN 1879-1964
Issue year2020
Vol142
Pages1-13
Publication size in sheets0.6
Article number105522
Keywords in Englishfiltration, lattice Boltzmann, Brownian dynamics, multi-phase flows, porous media
ASJC Classification2304 Environmental Chemistry; 2310 Pollution; 2500 General Materials Science
DOIDOI:10.1016/j.jaerosci.2020.105522
URL https://www.sciencedirect.com/science/article/pii/S0021850220300112
Languageen angielski
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Przekop R., Jackiewicz-Zagórska A.I. - Effect of mesoscale...pdf 1.52 MB
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 07-08-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.039; WoS Impact Factor: 2018 = 2.24 (2) - 2018=2.285 (5)
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