Epitaxial Ba0.6Sr0.4TiO3 films were grown onto ~001! LaAlO3 by pulsed-laser deposition, and the dislocation structures of the films were investigated using transmission electron microscopy. Misfit dislocations with a periodicity of about 7 nm and Burgers vectors b5a^100& were observed at the interface. A high density of threading dislocations was present the films and these also had b 5a^100& ....

We present a novel microfluidic approach for the generation of monodisperse oil droplets in water with ultra-low interfacial tensions. Using an oil-water-surfactant formulation under conditions close to the microemulsion phase transition, we actively controlled the surface tension at the liquid-liquid interface within the microfluidic device in order to produce monodisperse droplets. These drop...

A level set technique for interface tracking is presented, both for the continuum surface force formulation and the ghost fluid method approach. A projection method is used to solve incompressible Navier– Stokes equations that are coupled to a transport equation for the level set function, defined as the algebraic distance to interface. Results are presented for head-on droplet collisions in co...

A multi-phase field model for quantitative simulations of polycrystalline solidification of binary alloys is introduced. During the freegrowth stage of solidification, the model exploits the thin-interface analysis developed by Karma [3] in order to realistically capture bulk phase diffusion and the sharp interface corrections predicted by traditional models of solidification. During grain boun...

Water model experiments in an acrylic resin vessel have been performed to visualize evolution, growth, coalescence, vibration, and clustering of multi-cavitation bubbles in a standing plain wave at the frequency of about 42 kHz by using high-speed camera. Their dynamic behaviors are phenomenologically discussed in relation to the ultrasound field specified. Another experiment has also been carr...

We consider a competing spatial growth dynamics permitting that more than one cluster develop in the same environment given by a first-passage percolation model on a Voronoi tiling of the plane. We focus on the long time behavior of these competing clusters and derive some limit theorems related to the morphology of the “competition interface”. To study the structure of this interface we use th...

This paper proposes and implements a novel hybrid level set method which combines the numerical efficiency of the local level set approach with the temporal stability afforded by a semi-implicit technique. By introducing an extraction/insertion algorithm into the local level set approach, we can accurately capture complicated behaviors such as interface separation and coalescence. This techniqu...