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所属单位：航空学院

发表刊物：Phys. Rev. Appl.

摘要：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.

论文类型：期刊论文

是否译文：否

发表时间：2019-04-19

合写作者：Zhao Kangdong,彭瀚旻,李华峰

通讯作者：Liu Wenjuan,芦小龙