Control of Particle Motion with Ultrasonic Vibration

The purpose of this research is to control the particles motion by the ultrasonic standing wave in air. In this research, simulation have been compared with experiment for the confirmation of validity and examined the possibility for control of particles motion by ultrasonic standing wave. As the result, simulation corresponded with experiments qualitatively. Also, maximum sound pressure can be increased by converging the acoustic wave with a reflector. Then slow speed particles are more easily affected by acoustic radiation force. But, the motion control of small particle was difficult because acoustic radiation force acting on particle was weak. Additionally, motion of small particle is susceptible to acoustic streaming. Therefore influence of acoustic streaming must be taken into consideration when we want to control the motion of small particle.