Presentation Information
[10a-C309-11]Acoustically Driven Trapezoidal Membrane Pump
〇(M2)Haruka Nakanami1, Takao Ono1, Junsuke Yamanishi1, Satoyuki Kawano1 (1.UOsaka)
Keywords:
biomimetics,micropump,acoustic actuation
We are developing a micropump that drives liquid acoustically and without contact. The concept is inspired by the human inner ear, where sound generates a traveling wave on the trapezoidal basilar membrane that sets the surrounding lymph fluid in motion. In our device, a trapezoidal membrane is set into the bottom of a closed-loop channel, and when sound pressure is applied from a speaker, a traveling wave appears on the membrane at specific frequencies and the water circulates at up to 0.9 mm/s. When the membrane was scaled down to 0.8 times its size, the frequency band that produced flow shifted upward, suggesting that, by choosing the membrane's shape and the driving frequency, multiple pumps could be driven individually and without contact.