Capillary thinning and break-up of particulate suspensions

Abstract eng:
The capillary driven thinning and break-up of non-Brownian suspensions are considered. Experiments show that in the final stages of break-up (when the filament diameter is approximately five times that of the suspended particles) the thinning no longer follows the behaviour predicted by the bulk viscosity; instead thinning is accelerated due to the effects of finite particle size. A simple onedimensional model is described in which the viscosity is determined from the local particle density, found by tracking individual particles within the suspension. Despite its simplicity this model is able to reproduce quantitively the thinning behaviour observed in experiments.

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