Prediction of negative radiation forces due to a Bessel beam.
Prediction of negative radiation forces due to a Bessel beam.
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DOI：
10.1121/1.4884758
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发表时间：
2014-08
期刊：
影响因子：
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通讯作者：
M. Azarpeyvand
中科院分区：
文献类型：
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作者：
M. Azarpeyvand
研究了对站在单个、平移不变、对称声学贝塞尔光束路径上的物体产生向后拖曳力的机制。本文旨在基于声学可穿透物体的弹性动力响应和梁的非近轴性参数，为负轴向力的出现提供机械和结构条件。对各种液体和固体弹性情况进行了广泛的数值研究，以说明所提出的基于特征频率的条件的有效性。结果表明，零级贝塞尔光束照射的球体上出现的负辐射力与粒子的本征频率之间存在复杂但可解释的联系。在阐明这些关系方面已经取得了相当大的进展，这可能会导致可预测且稳健的单波束声学处理设备的开发。
The mechanism of generating backward dragging forces on objects standing in the path of a single, translationally invariant, symmetric acoustic Bessel beam is studied. This paper aims to provide mechanical and structural conditions for the emergence of negative axial forces based on the elastodynamic response of acoustically penetrable objects and beam's nonparaxiality parameter. An extensive numerical study has been performed for various liquid and solid elastic cases to illustrate the validity of the proposed eigenfrequency-based conditions. Results have revealed the existence of a complex but interpretable link between the emergence of negative radiation forces on spheres illuminated by zero-order Bessel beams and the eigenfrequencies of the particle. Considerable progress has been made in elucidating these relationships, which may lead to the development of predictable and robust single-beam acoustic handling devices.