Filtration model for polydisperse aerosols in gas‐solid flow using granule‐resolved direct numerical simulation. Issue 11 (1st July 2015)

• Record Type: Journal Article
• Authors: Kolakaluri, R.; Murphy, E.; Subramaniam, S.; Brown, R. C.; Fox, R. O.
• Is Part Of: AIChE journal. Volume 61:Issue 11(2015:Nov.)
• Page Start: 3594
• Page End: 3606
• Publication Date: 2015-07-01
• Subjects: Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.14901
• Languages: English
• ISSNs: 0001-1541

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>An analytical framework for calculating the filtration efficiency of polydisperse aerosols in a granular bed is developed for cases where inertial impaction and interception are the principal filtration mechanisms. This framework is used to develop a model for the polydisperse single‐collector efficiency from monodisperse single‐collector efficiency correlations. Conceptually, the polydisperse model is developed by transforming the probability density of particle radius into a probability density of particle Stokes number that is then used to weight the monodisperse single‐collector efficiency at a given Stokes number. An extension of this polydisperse filtration concept results in an analytical solution for the axial variation of polydisperse particle flux in a random three‐dimensional granule configuration. In order to verify the analytical results for polydisperse particle filtration, a granule‐resolved direct numerical simulation approach is coupled with Lagrangian particle tracking to simulate filtration of polydisperse aerosols in a granular bed. © 2015 American Institute of Chemical Engineers <italic>AIChE J</italic>, 61: 3594–3606, 2015</p> </abstract>