Use of a simple model for the interpretation of experimental data on particle resuspension in turbulent flows
2001; Elsevier BV; Volume: 32; Issue: 10 Linguagem: Inglês
10.1016/s0021-8502(01)00048-9
ISSN1879-1964
AutoresL. Biasi, A. de los Reyes, Michael W. Reeks, G.F. De Santi,
Tópico(s)Granular flow and fluidized beds
ResumoA 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 range of particle size from sub-micron to 30μm in both mono-layer and multi-layer deposits. Correlations 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 surface 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 mono-layer. The model including these correlations is easily implementable and suitable for incorporation into severe nuclear accident codes and industrial gas/particle codes.
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