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Resuspension of small particles from multilayer deposits in turbulent boundary layers

Lookup NU author(s): Fan Zhang, Emeritus Professor Mike Reeks, Professor Richard Perkins


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This paper describes a hybrid kinetic model for the resuspension of micron-size particlesfrom multilayer deposits in a fully developed turbulent boundary layer. The rate ofremoval of particles from any given layer depends upon the rate of removal of particlesfrom the layer above which acts as a source of uncovering and exposure of particles to theresuspending flow. The primary resuspension rate constant for an individual particlewithin a layer is based on the Rock'n'Roll (R'n'R) model using non-Gaussian statistics forthe aerodynamic removal forces acting on the particles (Zhang et al., 2013). The coupledlayer equations that describe multilayer resuspension of all the particles in each layer arebased on the generic lattice model of Friess & Yadigaroglu (2001) which is extended hereto include the influence of layer coverage and particle size distribution. The model is usedto investigate a range of effects, including the influence of layer thickness on resuspension,the spread of inter-particle adhesive forces within layers, Gaussian and non-Gaussian pdfsfor the removal forces and the associated timescales. Finally model predictions arecompared with data from two resuspension experiments – STORM (Castelo et al., 1999)and BISE (Alloul-Marmor, 2002)

Publication metadata

Author(s): Zhang F, Reeks MW, Kissane MP, Perkins RJ

Publication type: Article

Publication status: Published

Journal: Journal of Aerosol Science

Year: 2013

Volume: 66

Pages: 31-61

Print publication date: 20/08/2013

ISSN (print): 0021-8502

ISSN (electronic): 1879-1964

Publisher: Pergamon


DOI: 10.1016/j.jaerosci.2013.07.009


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