(195e) Numerical Simulation of Acoustic Streaming Flows in Non-Newtonian Fluids

Acoustic streaming is a phenomenon where a micro-sized object is vibrated to induce vortex flows around the object. We have investigated acoustic streaming induced by a micro-sized bubble as well as a micro-sized cylinder. For microbubble streaming, we have studied the bubble protrusion effect on the flow pattern. The results from numerical simulation, theoretical model, and experiments are compared for discussion. For the streaming by an oscillating cylinder, numerical simulation was performed for the comparison with the flow patterns induced by a vibrating microbubble with the same diameter. Flow patterns induced in Newtonian, Power-law fluids, and viscoelastic fluids are also compared.