Modeling of fibrous filter media for ultrafine particle filtration

Seungkoo Kang, Handol Lee, Seong Chan Kim, Da Ren Chen, David Y.H. Pui

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Fibrous filter media are widely applied to remove aerosol particles. The modeling and prediction of filtration performance of fibrous media is of importance to design filter media targeted for specific applications. In this work, we successfully developed a 2-D numerical modeling for fibrous filter media. In our modeling, the flow field and fates of particles were calculated in model filter media having the fiber size distribution, average solidity, and thickness the same as those of real media. An excellent agreement was obtained between the numerical and experimental particle collection efficiencies of two commercially available fibrous filter media for particles in the sizes ranging from 3 to 500 nm. We also investigated the effect of fiber size polydispersity (both in the unimodal and bimodal fiber size distributions) on the particle collection efficiency of fibrous media. It was found that the particle capture in fibrous media is noticeably influenced by the polydispersity of fibers in a unimodal distribution, especially for particles in the sizes ranging from 10 to 100 nm, and further effected by the peak size and volume fraction in each mode of a bimodal fiber size distribution.

Original languageEnglish (US)
Pages (from-to)461-469
Number of pages9
JournalSeparation and Purification Technology
Volume209
DOIs
StatePublished - Jan 31 2019

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

  • Collection efficiency
  • Fibrous filter media
  • Nanoparticle filtration
  • Polydisperse fibers

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