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Effect of particle size and material properties on aerodynamic resuspension from surfaces

Phares, Denis J. and Smedley, Gregory T. and Flagan, Richard C. (2000) Effect of particle size and material properties on aerodynamic resuspension from surfaces. Journal of Aerosol Science, 31 (11). pp. 1335-1353. ISSN 0021-8502. doi:10.1016/S0021-8502(00)00034-3.

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An experimental study of the aerodynamic entrainment of monodisperse spheres from glass substrates is presented. The spheres were made of ammonium fluorescein and polystyrene standards (M_W=3700, 18,700, and 114,200 amu). The use of monosized particles with carefully controlled properties leads to a narrow distribution of sphere-surface adhesion forces, facilitating the determination of the particle entrainment threshold. The spheres were exposed to well-characterized shear stresses in two different flows, (i) laminar channel flow; and (ii) a normally impinging gas jet. Threshold shear stresses were found to be more sensitive to particle size than predicted by the existing resuspension theories, which are based on equilibrium adhesion models. Furthermore, resuspension was also found to be sensitive to the duration of the applied shear stress. This sensitivity depends upon the particle size and material properties. A kinetic model of particle detachment is presented to account for these observed trends.

Item Type:Article
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Flagan, Richard C.0000-0001-5690-770X
Additional Information:© 2000 Elsevier. (First received 11 June 1999; and in final form 1 February 2000) Support for this work was provided by the FAA under Grant 93-G-060.
Funding AgencyGrant Number
Federal Aviation Administration (FAA)93-G-060
Issue or Number:11
Record Number:CaltechAUTHORS:20150806-170144449
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Official Citation:Denis J Phares, Gregory T Smedley, Richard C Flagan, EFFECT OF PARTICLE SIZE AND MATERIAL PROPERTIES ON AERODYNAMIC RESUSPENSION FROM SURFACES, Journal of Aerosol Science, Volume 31, Issue 11, November 2000, Pages 1335-1353, ISSN 0021-8502, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59292
Deposited By: Irina Meininger
Deposited On:08 Aug 2015 03:18
Last Modified:10 Nov 2021 22:18

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