Ac. Hoffmann et J. Kevelam, Model for the interparticle surface separation in concentrated mono- and polydisperse suspensions, AICHE J, 45(2), 1999, pp. 285-290
The interparticle surface separation in mono- and polydisperse concentrated
suspensions of spherical particles is discussed. For monosized particles,
it is shown that the "expansion" argument of Frankel and Acrivos (1967) can
be extended from cubic to arbitrary packing geometries. This argument is t
hen further extended to polydisperse suspensions, resulting in an equation
of the same form, but incorporating the surface mean particle diameter for
the interparticle surface separation in terms of the packing fraction of th
e equivalent packed bed (a packed bed with the same packing geometry as the
suspension) and that of the suspension. Another approach to interparticle
surface separation in suspensions (the "volume of free liquid" argument) co
nfirms the usefulness of the surface mean particle diameter for polydispers
e suspensions. A relation potentially useful for suspensions of nonspherica
l particles is also given.