On the generation of nonlinear travelling waves in confined geometries using electric fields

摘要: We investigate electrostatically induced interfacial instabilities and subsequent generation of nonlinear coherent structures in immiscible, viscous, dielectric multi-layer stratified flows confined small-scale channels. Vertical electric fields are imposed across the channel to produce that would normally be absent such flows. In situations when vertical constant, emerge due presence electrostatic forces, we follow dynamics via direct numerical simulations. also propose illustrate a novel pumping mechanism microfluidic devices does not use moving parts. This is achieved by first inducing using constant background obtain fully deformations. The second step involves manipulation voltage on lower electrode (channel wall) spatio-temporally varying there, form travelling wave with pre-determined properties. Such dielectrophoresis methods shown generate intricate fluid–surface–structure interactions can practical value since they net mass flux along thus candidates for pumps without show extensive simulations this phenomenon result an externally forms at fluid–fluid interface study characteristics generated velocity field inside channel.