Abstract
An experimental study has been made of the collisions and coalescence of solid spheres and liquid drops in a simple shear field. Asymmetric particle trajectories were ascribed to drop deformation due to the shear field and the collision. Analysis was made of the possible rest configurations of coalesced sphere—drop pairs in terms of the wetting characteristics of the particular system and their rotational behavior and break-up mode was studied in simple shear flow. Sphere—drop pairs consisting of liquid drops containing solid spheres at their center were found to exhibit a new mode of drop rupture involving impulsively started shear fields. Study was also made of the behavior in shear of liquid bridged doublets consisting of two identical solid spheres joined by a bridging liquid. In limiting cases their behavior may be compared with that of rigid dumbbells or pure drops.
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