球聚焦声源对微球声辐射力的计算。
Calculation of acoustical radiation force on microsphere by spherically-focused source.
机构信息
Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China.
Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China; State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.
出版信息
Ultrasonics. 2014 Sep;54(7):1977-83. doi: 10.1016/j.ultras.2014.05.005. Epub 2014 May 15.
Based on the ray acoustics approach, the trapping effects on a microsphere by an ideally spherically-focused ultrasound are discussed. The acoustical radiation force from a focused ultrasound beam on a spherical particle in a three-dimensional sound field is calculated considering the effect of the attenuation of the ultrasound beam both inside the particle and in the surrounding medium. The results show that as long as the particle is in the range of the ultrasound beam and as long as the appropriate parameters of the transducer are selected, the particle will be captured in the vicinity of the focus of the ultrasound beam. Also, the particle radius and different parameters of the transducer are analyzed for their affect on the radiation force.
基于射线声学方法，讨论了理想球面聚焦超声对微球的俘获效应。在三维声场中，考虑到超声束在粒子内部和周围介质中的衰减效应，计算了聚焦超声束对球形粒子的声辐射力。结果表明，只要粒子在超声束的范围内，并且选择适当的换能器参数，粒子就会被捕获在超声束的焦点附近。此外，还分析了粒子半径和换能器的不同参数对辐射力的影响。
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