Radiation force of an arbitrary acoustic beam on an elastic sphere in a fluid
Radiation force of an arbitrary acoustic beam on an elastic sphere in a fluid
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DOI：
10.1121/1.4773924
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发表时间：
2013-02-01
影响因子：
2.4
通讯作者：
Bailey, Michael R.
中科院分区：
文献类型：
--
作者：
Sapozhnikov, Oleg A.;Bailey, Michael R.
提出了一种计算任意声束在液体或气体介质弹性球上的辐射力的理论方法。首先，采用常规的角谱分解将入射光束描述为平面波的和。然后，将平面波从弹性球散射的经典解应用于入射场的每个平面波分量。净散射场表示为入射光束的所有角谱分量的散射场的叠加。利用该公式，将入射波和散射波在远场叠加，推导出辐射应力张量分量的表达式。然后将这些表达式在球面上积分，以解析地描述弹性球上的辐射力。给出了特定类型入射光束的极限情况，并与已知结果相一致。最后，利用解析表达式计算了两个特定聚焦换能器的辐射力。(C) 2013年美国声学学会。[http://dx.doi.org/10.1121/1.4773924]
A theoretical approach is developed to calculate the radiation force of an arbitrary acoustic beam on an elastic sphere in a liquid or gas medium. First, the incident beam is described as a sum of plane waves by employing conventional angular spectrum decomposition. Then, the classical solution for the scattering of a plane wave from an elastic sphere is applied for each plane-wave component of the incident field. The net scattered field is expressed as a superposition of the scattered fields from all angular spectrum components of the incident beam. With this formulation, the incident and scattered waves are superposed in the far field to derive expressions for components of the radiation stress tensor. These expressions are then integrated over a spherical surface to analytically describe the radiation force on an elastic sphere. Limiting cases for particular types of incident beams are presented and are shown to agree with known results. Finally, the analytical expressions are used to calculate radiation forces associated with two specific focusing transducers. (C) 2013 Acoustical Society of America. [http://dx.doi.org/10.1121/1.4773924]