Acoustically Driven Fluid and Particle Motion in Confined and Leaky Systems
Acoustically Driven Fluid and Particle Motion in Confined and Leaky Systems
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DOI：
10.1103/physrevapplied.9.014027
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发表时间：
2018-01-25
影响因子：
4.6
通讯作者：
Kaehler, Christian J.
中科院分区：
文献类型：
--
作者：
Barnkob, Rune;Nama, Nitesh;Kaehler, Christian J.
流体和颗粒在受限和声泄漏系统中的声学运动因其在医学和生物技术中的应用而受到越来越多的关注。目前存在一些相互矛盾的物理和数值模型，但由于难以获得验证的实验数据，它们的有效性尚不确定。我们提供了测量三维粒子轨迹的实验基准数据，并证明了在没有任何拟合参数的情况下，可以用具有泄漏阻抗壁条件的约化流体模型来描述粒子轨迹。结果揭示了迄今未知的驱动声流的伪驻波的存在以及悬浮物上的声辐射力。
The acoustic motion of fluids and particles in confined and acoustically leaky systems is receiving increasing attention for its use in medicine and biotechnology. A number of contradicting physical and numerical models currently exist, but their validity is uncertain due to the unavailability of hard-to-access experimental data for validation. We provide experimental benchmarking data by measuring 3D particle trajectories and demonstrate that the particle trajectories can be described numerically without any fitting parameter by a reduced-fluid model with leaky impedance-wall conditions. The results reveal the hitherto unknown existence of a pseudo-standing wave that drives the acoustic streaming as well as the acoustic radiation force on suspended particles.