Broadband acoustic trapping of a particle by a soft plate with a periodic deep grating
Broadband acoustic trapping of a particle by a soft plate with a periodic deep grating
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DOI：
10.1063/1.4919218
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发表时间：
2015-01
期刊：
影响因子：
--
通讯作者：
Hailong He;Shiliang Ouyang;Zhaojian He;K. Deng;He-ping Zhao
中科院分区：
文献类型：
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作者：
Hailong He;Shiliang Ouyang;Zhaojian He;K. Deng;He-ping Zhao
本文研究了声辐射力（ARF）作用于圆柱形黄铜颗粒在具有周期性深光栅的声学软板附近的情况。证实了负ARF的存在，通过该负ARF可以将粒子拉向声源。此外，在这个软板系统中的负ARF的带宽被发现是相当广泛的比在以前的研究中通常使用的刚性板系统。场分布分析进一步证明了负ARF是由梯度涡速度场在表面附近诱导的梯度力引起的，梯度力源于薄板中Scholte表面波反对称耦合的集体共振激发。还详细研究了颗粒位置和尺寸对ARF的影响。负ARF在需要使用声波进行粒子操纵的应用中具有潜在的用途。
We investigated the acoustic radiation force (ARF) acting on a cylindrical brass particle near an acoustically soft plate patterned with a periodic deep grating. The existence of a negative ARF by which the particle can be pulled towards the sound source is confirmed. In addition, the bandwidth for negative ARF in this soft-plate system is found to be considerably broader than in the stiff-plate systems typically used in previous studies. It is further demonstrated by field distribution analysis that the negative ARF is caused by the gradient force induced by the gradient vortex velocity field near the surface, which stems from the collective resonance excitation of the antisymmetric coupling of Scholte surface waves in the thin plate. The effects of particle location and size on the ARF were also investigated in detail. The negative ARF has potential use in applications requiring particle manipulation using acoustic waves.