Study of an acoustic field in a microchannel
Study of an acoustic field in a microchannel
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微通道中声场的研究
DOI：
10.1143/jjap.49.07he14
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发表时间：
2010
影响因子：
1.5
通讯作者：
砥綿篤哉
中科院分区：
文献类型：
--
作者：
小塚晃透;安井久一;畑中信一;辻内亨;Judy Lee;砥綿篤哉
利用驻波场，可以在声压分布的节点处捕获小物体。在本研究中，声波由微通道外的换能器产生，并传播到玻璃板上的微通道中，在微通道中产生驻波场。当含有氧化铝颗粒的水注入微通道时，声场中形成了几层颗粒。此外，当超声驱动频率扫频时，可以控制颗粒流的方向。对声场进行了数值计算，并对实验结果进行了讨论。
Using a standing-wave field, it is possible to trap small objects at nodes of a sound pressure distribution. In the present study, a sound wave was generated by a transducer outside of a microchannel, and propagated into a microchannel on a glass plate, where it generated a standing wave field. When water containing alumina particles was injected into the microchannel, several layers of particles were formed in the sound field. Moreover, when the ultrasound driving frequency was swept, it was possible to control the direction of the particle flow. The sound field was numerically calculated and the experimental results are discussed.