Acoustic streaming induced by anti-symmetrical flexural modes near a wedge tip

Abstract

Acoustic streaming (AS) is a steady fluid flow driven by the absorption of high amplitude ultrasonic vibrations due to the nonlinear effect. With potential applications in micro-pumping, the AS-related behaviors remain as interesting topics to the acoustic community. Anti-symmetric flexural (ASF) modes are wedge waves with their particle motion anti-symmetric about the apex mid-plane. With the energy tightly confined near the wedge-tip, ASF mode has relatively high acoustic amplitude which suggest it's as a good candidate for the investigation of AS. In this study, the AS behaviors induced by ASF modes are investigated by computational fluid dynamics (CFD). The ASF induced three-dimensional AS flow field are presented through the CFD analysis.