Affiliation of Author(s):航空学院
Journal:Phys. Rev. Appl.
Abstract:Artificial micro- and nanomachines are of great interest to both scientific and engineering societies. We investigate an alternative actuation mechanism using locally enhanced microstreaming in a low-frequency acoustic field and propose a controllable high-speed acoustic rotary microsystem. With numerical simulations, we show that the local acoustic streaming field can be enhanced when utilizing the low-frequency vibration from the micropillar structure. In particular, the elliptical oscillation from the micropillar occurs at hundreds of kilohertz and gives rise to the reinforced rotary microstreaming, thereby enabling the high-speed rotation of microparticles. Using this facile and controllable methodology, a polystyrene (PS) microrotor with a diameter of 10 μm can be driven to rotate at a fast speed of up to 5000 rpm. This actuation mechanism along with the favorable acoustic rotary microsystem provides another alternative for designing high-speed rotary micromachines. © 2019 American Physical Society.
Indexed by:Journal paper
Translation or Not:no
Date of Publication:2019-04-19
Co-author:Zhao Kangdong,Peng Hanmin,Li Huafeng
Correspondence Author:Liu Wenjuan,Lu Xiaolong
Date of Publication:2019-04-19