Title :
Channel flow by applying ultrasonic vibration
Author :
Nomura, Shinfuku ; Sasaki, Yuichi ; Murakami, Koichi
Author_Institution :
Dept. of Mech. Eng., Ehime Univ., Matsuyama, Japan
Abstract :
The flow pattern in a channel by ultrasonic vibration has been investigated as a basic research into non-contact fluid control. An ultrasonic transducer is fixed to the center of the bottom of a square test channel, and a standing wave field is formed in this channel. By applying ultrasonic vibration into the flow, cavitation bubbles are generated at the sound pressure antinode in the channel when Re=2000. Consequently, cavitation bubbles act on the fluid as a barrier causing a separation in the flow and the velocity is reduced locally
Keywords :
acoustic field; acoustic streaming; bubbles; cavitation; channel flow; flow control; flow separation; ultrasonic effects; acoustic levitation; acoustic streaming; cavitation bubbles; channel flow pattern; flow separation; flow velocity profile; forced flow system; noncontact fluid control; sound pressure antinode; standing wave field; ultrasonic vibration; Acoustic measurements; Acoustic testing; Acoustic transducers; Acoustic waves; Fluid flow; Fluid flow control; Ultrasonic transducers; Ultrasonic variables measurement; Velocity measurement; Vibration control;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762249
