We present here a proof-of-concept of a novel, efficient method for modeling of liquid/gas interface dynamics. Our approach consists in coupling the lattice Boltzmann gas (LBG) and the level set (LS) methods. The inherent parallel character of LBG accelerated by level sets is the principal advantage of our approach over similar particle based solvers. Consequently, this property allows for effi...

Molecular dynamics studies of nanometer-sized rigid grains, droplets and bubbles in nanometer-sized pores indicate that the drag force may have a hydrodynamic form if the moving object is dense and small compared to the pore diameter. Otherwise, the behavior is nonhydrodynamic. The terminal speed is insensitive to whether the falling droplet is made of liquid or a solid. The velocity profiles w...

The presence of a very small amount of high molecular weight polymer significantly delays the pinch-off singularity of a drop of water falling from a faucet and leads to the formation of a long-lived cylindrical filament. In this Letter, we present experiments, numerical simulations, and theory which examines the pinch-off process in the presence of polymers. The numerical simulations are found...

The Lattice Boltzmann Method is used to simulate the dynamics of droplet deformation in a channel flow under various conditions. The droplet behavior has been investigated under transient conditions. For cases where the droplet remains attached to the surface, the shape deformation of the droplet during crawling is captured. It has been shown that there is a limiting value for the droplet volum...

in this paper the dynamic of a droplet on a surface with a hole is investigated under gravitational effect by using lattice boltzmann method. incompressible two-phase flow with high density ratio proposed by lee is considered. cahn’s theory is used to observe the wettability of the surface in contact with liquid and gas phases. several parameters such as contact angle, surface tension and gravi...

Numerous studies have used ground-based, freely falling, isolated droplets to study the combustion behavior of liquid fuels, fuel emulsions, and liquid-solid slurries (Sangiovanni and Labowsky, Combust. Flame, 1982; Choi et al, 23rd Symp. (Int’l.) on Comb., 1990; Lee and Law, Comb. Sci. Tech., 1992). Droplets of mono-disperse size formed repetitively are projected down a duct flow oriented para...

the aim of the present study was to investigate the influence of nozzle configurations on spray drift and explain the influences using several atomization characteristics (length of spray sheet, spray angle, velocity distribution of flow field, fluctuation of velocity, and droplet size). nozzles manufactured by one company (lechler gmbh, germany) were tested by spraying local tap water in a win...

We present the first results of a new rapid prototyping technique that has been developed, which can produce structures with high aspect ratios (44:1) and freeform overhangs. The technique uses a piezoelectric printhead to precisely deposit material drop by drop at predetermined positions on a substrate. The temperature of the printhead can be varied so as to adjust the ink's viscosity, in orde...

Abstract More than 100 years ago, Robert Millikan demonstrated the quantization of electron using charged, falling droplets, but statistical analysis on many droplets did not allow a direct visualization charge. Instead letting fall, we have used optical levitation to create single droplet version Millikan’s experiment where effects removal can be observed by naked eye and measured with ruler. ...