Capillary interactions between dynamically forced particles adsorbed at a planar interface and on a bubble.

ABSTRACT: We investigate the dynamic interfacial deformation induced by micrometric particles exerting a periodic force on a planar interface or on a bubble, and the resulting lateral capillary interactions. Assuming that the deformation of the interface is small, neglecting the effect of viscosity, and assuming point particles, we derive analytical formulas for the dynamic deformation of the interface. For the case of a planar interface the dynamic point force simply generates capillary waves, while for the case of a bubble it excites shape oscillations, with a dominat deformation mode that depends on the bubble radius for a given forcing frequency. We evaluate the lateral capillary force acting between two particles, by superimposing the deformations induced by two point forces. We find that the l

SUBMITTER: De Corato M 

PROVIDER: S-EPMC5986083 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature