Droplet splashing on thin moving films at high Weber numbers

Rayleigh-Taylor Instability of Viscoelastic Drops at High Weber Numbers

Movies of the breakup of viscous and viscoelastic drops in the high speed airstream behind a shock wave in a shock tube have been reported by Joseph, Belanger and Beavers [1999]. A Rayleigh-Taylor stability analysis for the initial breakup of a drop of Newtonian liquid was presented in that paper. The movies, which may be viewed at http://www.aem.umn.edu/ research/Aerodynamic_Breakup, show that...

Kinetics of Ga droplet decay on thin carbon films

Splashing Phenomena during Liquid Droplet Impact

Splashing is a phenomenon often observed during liquid droplet impact onto a solid surface. The threshold of splashing is known to be related to droplet size, impact velocity, and physical properties of the liquid, but the mechanisms that initiate splashing are not understood completely. In accordance with the Kelvin-Helmholtz (K-H) instability analysis, recent studies have shown that ambient g...

High T c thin films prepared by laser ablation: material distribution and droplet problem

The lateral material distribution of laser-deposited YBa2Cu307_ ,~ films and the density of droplets coming from the target were studied by varying the laser pulse energy, the laser spot size and the target-to-substrate distance. Silicon wafers at ambient temperature were used as substrates to guarantee a large sticking coefficient of the particles. The deposition rate is found to depend linear...

Effects of Droplet Interactions on Droplet Transport at Intermediate Reynolds Numbers

Effects of droplet interactions on drag, evaporation, and combustion of a planar droplet array, oriented perpendicular to the approaching flow, are studied numerically. dimensional Navier-Stokes equations, with variable thermophysical properties, are solved using finited i f f e r e n c e technjques. Pwamete rs investigated include the droplet spacing, droplet Reynolds number, approaching strea...