When an aqueous drop contacts immiscible oil film, it displays complex interfacial dynamics. Upon contact the spreads onto drop's liquid-air interface, first forming a curvature that drives apparent spreading motion and later fully engulfing drop. We study this flow using both 3-phase Lattice-Boltzmann simulations based on conservative phase field model experiments. Inertially viscously limited...

This paper discusses a new volumeand volume concentration–conserving, positive-definite, unconditionally stable iterative numerical scheme for solving temporary cloud/raindrop coalescence followed by breakup and the coupling of the scheme with an existing noniterative, volumeand volume concentration– conserving collision/coalescence (coagulation) scheme. The breakup scheme alone compares nearly...

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Numerical method is presented for simulation of the deformation, drainage and rupture of axisymmetrical film (gap) between colliding drops in the presence of film soluble surfactants under the influence of van der Waals forces at small capillary and Reynolds numbers and small surfactant concentrations. The mathematical model is based on the lubrication equations in the gap between drops and the...

Monte Carlo simulations of two-component drop growth L. Alfonso et al.

A systematic study of gating water infiltration and condensation into ceramic nanopores by carefully adjusting the wetting properties mesoporous films using photoactive spiropyran is presented. Contact angle measurements from side reveal significant changes in wettability after irradiation due to spiropyran/merocyanine-isomerization, which induce a transition dry wet pores. The change allows co...

A systematic experimental study of the effect of several factors on the mean drop diameter, d32, during emulsification, is performed with soybean oil-in-water emulsions. These factors are (1) type of used emulsifier; (2) emulsifier concentration, CS; and (3) ionic strength of the aqueous solution. Three different types of emulsifier, anionic (sodium dodecyl sulfate, SDS), nonionic (polyoxyethyl...

Most basidiomycete fungi actively eject their spores. The process begins with the condensation of a water droplet at the base of the spore. The fusion of the droplet onto the spore creates a momentum that propels the spore forward. The use of surface tension for spore ejection offers a new paradigm to perform work at small length scales. However, this mechanism of force generation remains poorl...

condensing flows in nozzles and fixed blades of steam turbine have always been the subject of many studies.in such flows, existence of liquid phase in vapor changes the nature of the flow. the major of changes are due to four main mechanisms included nucleation, droplet growth, coalescence and breakage of droplets. in this paper,the effects of coalescence process between droplets have been inve...