Lattice Boltzmann Simulations of Multiphase Dielectric Fluids

The dynamic effect of an electric field on dielectric liquids is called liquid dielectrophoresis. It widely used in several industrial and scientific applications, including inkjet printing, micro-fabrication optical devices. Numerical simulations liquid-dielectrophoresis are necessary to understand the fundamental physics phenomenon, but also explore situations that might be difficult or expensive implement experimentally. However, such modelling challenging, as one needs solve electrostatic fluid dynamics equations simultaneously. Here, we formulate a new lattice-Boltzmann method capable immiscible fluids coupled with fields within single framework, thus eliminating need using separate algorithms equations. We validate numerical by comparing it analytical solutions previously reported experimental results. Beyond benchmarking method, study spreading droplet dielectrowetting setup quantify mechanism driving variation apparent contact angle applied voltage. Our provides useful tool can model general, liquid-liquid liquid-gas systems.