When a simple or complex liquid recedes from a smooth solid substrate it often leaves a homogeneous or structured deposit behind. In the case of a receding non-volatile pure liquid the deposit might be a liquid film or an arrangement of droplets depending on the receding speed of the meniscus and the wetting properties of the system. For complex liquids with volatile components as, e.g., polyme...

We study hydrodynamic interactions of spherical particles in incident Poiseuille flow in a channel with infinite planar walls. The particles are suspended in a Newtonian fluid, and creeping-flow conditions are assumed. Numerical results, obtained using our highly accurate Cartesian-representation algorithm Physica A 356, 294 2005 are presented for a single sphere, two spheres, and arrays of man...

Abstract In this paper, we extend the unified gas-kinetic wave-particle (UGKWP) methods to multi-species gas mixture and multiscale plasma transport. The construction of scheme is based on direct modeling mesh size time step scales, local cell’s Knudsen number determines flow physics. proposed has asymptotic complexity diminishing properties. property means that according can capture non-equili...

The Boltzmann equation for a gas of smooth, inelastic hard spheres is introduced and its homogeneous solution for an isolated system is discussed. The possibility of hydrodynamic excitations is explored using the linearized Boltzmann equation for small spatial perturbations of the homogeneous state. It is shown that the spectrum of the generator for this linear dynamics contains five points at ...

To describe the hydrodynamic phenomena prevailing in large industrial scale fluidised beds continuum models are required. The flow in these systems depends strongly on particle-particle interaction and gas-particle interaction. For this reason proper closure relations for these two interactions are vital for reliable predictions on the basis of continuum models. Gas-particle interaction can be ...

– This letter describes the treatment of unsteady liquid flow by a hybrid particlecontinuum scheme. The scheme couples a particle region described by molecular dynamics with a coarse-grained domain solved by continuum fluid dynamics. The particle and continuum domains overlap in the coupling region, where two-way transfer of momentum flux is established. We demonstrate that this flux-coupling s...

We present a microfluidic particle-trap array that utilizes negative dielectrophoresis (nDEP) force and hydrodynamic force. The traps are located at the stagnation points of cylindrical pillars arranged in a regular array, and they can function as both single-particle traps (capable of discriminating particles based on size) and multiparticle traps (capable of controlling the number of particle...

To understand the behavior of composite fluid particles such as nucleated cells and double emulsions in flow, we study a finite-size particle encapsulated in a deforming droplet under shear flow as a model system. In addition to its concentric particle-droplet configuration, we numerically explore other eccentric and time-periodic equilibrium solutions, which emerge spontaneously via supercriti...