Theory and simulation of electroosmotic suppression of acoustic streaming

Acoustic handling of nanoparticles in resonating acoustofluidic devices is often impeded by the presence acoustic streaming. For micrometer-sized chambers, this streaming typically driven viscous shear thin boundary layer near fluid-solid interface. Alternating current (ac) electroosmosis another boundary-driven phenomenon routinely used microfluidic for particle suspensions electrolytes. Here, we study how can be suppressed combining ultrasound acoustics and ac electroosmosis. Based on a theoretical analysis electrokinetic problem, are able to compute numerically form electrical potential at interface, which suitable suppressing typical pattern associated with standing half-wave. In linear regime, even derive an analytical expression electroosmotic slip velocity interface use as guiding principle developing models experimentally more relevant nonlinear regime that occurs elevated driving voltages. We present simulation results device, showing implementing suppression resulting electroacoustic bulk device 2 orders magnitude.