We study numerically the deformation of sessile dielectric drops immersed in a second fluid when submitted to the optical radiation pressure of a continuous Gaussian laser wave. Both drop stretching and drop squeezing are investigated at steady state where capillary effects balance the optical radiation pressure. A boundary integral method is implemented to solve the axisymmetric Stokes flow in...

Phase separated macromolecules play essential roles in many biological and synthetic systems. We extend sessile droplet tensiometry to work with small quantities of such ultra-low surface tension droplets.

Accurate description, understanding and control of the high temperature interface behavior between SiC single crystal liquid phase is critical for further development solution growth. The different parameters which create morphological instabilities, such as step bunching, micro-faceting solvent trapping, remain unclear because they are very difficult to address in experiments. We combined expe...

For a pendent drop whose contact line is circle of radius r0, we derive the Furmidge-like relation mgsin?=?2?r0(cos?min?cos?max) at first order in Bond number, where ?min and ?max are angles back (uphill) front (downhill), m mass ? surface tension liquid. The (or Eötvös) number taken as Bo=mg?(2r0?). tilt angle ? may increase from ?=0 (sessile drop) to ?=??2 (drop pinned on vertical wall) ?=? c...

Contact angle hysteresis (CAH) is a significant factor affecting the drop motion on solid substrates. A model of CAH introduced to explore influence dynamics sessile uniformly heated surface, and two-dimensional evolution equation thickness established using lubrication approximation Navier slip boundary conditions. numerical simulation performed examine dynamic behaviors an evaporating drop, p...

Coalescence of liquid drops is critical in many phenomena such as emulsion stability, inkjet printing, and coating applications. For sessile drops on a solid surface, the coalescence process is more complicated than the coalescence of drops suspended in a fluid medium as a result of the coupling of the contact line motions to the fluid flow. In this paper, we use video microscopy to track the e...