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    Particle Collection Mechanisms Pertinent to Granular Bed Filtration

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    Flow fields and particle collection mechanisms in the maximum penetration regime are reviewed. Simple equations are introduced for predicting the size of the aerosol particles that most effectively penetrate a granular bed, and the corresponding minimum collection efficiency. Influences of filter operating velocity and granule size are also discussed. The results show that the most penetrating particle size for a granular bed filter exists as a result of either the Brownian diffusion mechanism combined with gravitation or Brownian diffusion with the interceptional mechanism.


    granular beds, filtration, dust collection, most penetrating particle size

    Author Information:

    Lee, Ken W.
    Associate Manager, Environmental Physics and Chemistry Section of Battelle's Columbus Division, Columbus, Ohio

    Committee/Subcommittee: F21.20

    DOI: 10.1520/STP42080S