Slow Settling of Two Droplets Symmetrically Placed about the Axis of a Circular Cylinder in a Direction Perpendicular to Their Line of Centers

Abstract

Expressions are provided which enable the frictional force on the reference spherical droplet to be computed for the particular case when two spherical droplets move in a direction perpendicular to their line of centers symmetrically placed about the axis of a circular cylinder. Results for this motion are also expressed in terms of the ratio of frictional forces experienced by 1) a droplet of arbitrary shape in a bounded fluid with another droplet and 2) the droplet now moving alone with the same speed and orientation in the same but unbounded fluid.