Ultrasonic Particle Manipulation
Ultrasonic Particle Manipulation
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DOI：
10.1007/978-0-387-68424-6_9
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发表时间：
2007-01-01
期刊：
影响因子：
--
通讯作者：
Harris, Nicholas R.
中科院分区：
文献类型：
--
作者：
Hill, Martyn;Harris, Nicholas R.
超声波场中的颗粒和其他声学不连续性（如第二相流体）会受到较小的力[1，2]。这些力通常在超声驻波（USW）中比在行波中更大。考虑图1所示的系统，其中流体中的颗粒由超声换能器和反射边界限定。如果换能器被驱动以激发腔的谐振频率，则将建立具有相关联的压力最大值和最小值的驻波。颗粒通常会被输送到压力-
Particles and other acoustic discontinuities (such as second phase fluids) within an ultrasonic field experience small forces [1, 2]. These forces are generally larger in an ultrasonic standing wave (USW) than in a progressive wave. Consider the system represented in Fig. 1, in which particles within a fluid are bounded by an ultrasonic transducer and a reflective boundary. If the transducer is driven so as to excite a resonance frequency of the cavity, a standing wave will be set up with associated pressure maxima and minima. Particles will generally be transported towards pres-