Numerical simulation of 3D boundary-driven acoustic streaming in microfluidic devices
Numerical simulation of 3D boundary-driven acoustic streaming in microfluidic devices
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DOI：
10.1039/c3lc50985k
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发表时间：
2014-01-01
期刊：
影响因子：
6.1
通讯作者：
Glynne-Jones, Peter
中科院分区：
文献类型：
--
作者：
Lei, Junjun;Hill, Martyn;Glynne-Jones, Peter
本文讨论了三维（3D）边界驱动的声流装置中的流动。首先，模拟了微通道中的三维瑞利流场，并展示了其对不同尺寸微粒运动的影响。从这个模型得到的结果显示出良好的比较与3D实验可视化，并证明了完全3D的性质的声流场和相关的声泳运动的微粒在声流体装置。然后将该方法应用于另一个声流体装置，以便深入了解不寻常的面内流模式。这种流动的起源尚未得到充分的描述，其特点不能解释从经典理论的瑞利流。模拟的平面内流动模式与实验可视化结果吻合良好。其背后的机制被证明是有关的主动声强场，这支持了我们以前的研究结果的平面内的声流模式可视化和建模在一个薄层毛细管装置的机制。
This article discusses three-dimensional (3D) boundary-driven streaming in acoustofluidic devices. Firstly, the 3D Rayleigh streaming pattern in a microchannel is simulated and its effect on the movement of microparticles of various sizes is demonstrated. The results obtained from this model show good comparisons with 3D experimental visualisations and demonstrate the fully 3D nature of the acoustic streaming field and the associated acoustophoretic motion of microparticles in acoustofluidic devices. This method is then applied to another acoustofluidic device in order to gain insights into an unusual in-plane streaming pattern. The origin of this streaming has not been fully described and its characteristics cannot be explained from the classical theory of Rayleigh streaming. The simulated in-plane streaming pattern was in good agreement with the experimental visualisation. The mechanism behind it is shown to be related to the active sound intensity field, which supports our previous findings on the mechanism of the in-plane acoustic streaming pattern visualised and modelled in a thin-layered capillary device.