Numerical study of the coupling layer between transducer and chip in acoustofluidic devices

We study by numerical simulation in two and three dimensions the coupling layer between transducer microfluidic chip ultrasound acoustofluidic devices. The model includes with electrodes, a liquid-filled microchannel, chip. consider commonly used materials, solid epoxy glue viscous glycerol, as well device types, glass capillary tubes silicon-glass chips. how acoustic resonances ideal devices without is either sustained or attenuated of increasing thickness inserted. establish simple criterion based on phase wave for whether given zero-layer resonance addition layer. Finally, we show that controlling material, can be design component optimal robust resonances.