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A simple mechanistic model for resuspension assuming a log-normal distribution of adhesive forces is used to analyse the resuspension measurements of a series of experiments reported in the literature covering a wide range of particle size from sub-micron to 50 microns in size in both single layer and multi layer deposits. Correlation's are derived for the geometric mean and spread of the adhesive force as a function of particle size. These show that adhesion is much less than that for smooth contact between particle and surface consistent with the effect of roughness. Furthermore sub-micron particles in a bed of particles appear to be more tightly bound with a much reduced spread than when the coverage of particles is less than a mon-layer. The model including these correlation's is easily implementable and suitable for incorporation into nuclear severe accident codes and industrial gas/particle codes.

Additional information

Authors: REEKS M, ISIS, JRC-Ispra (IT);DE SANTI G F, ISIS, JRC-Ispra (IT);BIASI L, Universita di Pavia & MATEC, Milan (IT);DE LOS REYES A, Consejo de Seguridad Nuclear (ES)
Bibliographic Reference: Article: Journal of Aerosol Science (1999)
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