Hagsäter S M, Lenshof A, Skafte-Pedersen P, Kutter J P, Laurell T, Bruus H
Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech Building 345 east, DK-2800, Kongens Lyngby, Denmark.
Lab Chip. 2008 Jul;8(7):1178-84. doi: 10.1039/b801028e. Epub 2008 May 16.
Acoustic actuation can be used to perform several tasks in microfluidic systems. In this paper, we investigate an acoustic separator through micro-PIV analysis in stop-flow mode and numerical simulations, and a good agreement between the two is found. Moreover, we demonstrate that it is not sufficient only to characterize devices in flow-through mode, since in these systems much different resonant patterns can result in similarly looking band formations. Furthermore, we conclude that extended 1D approximations of the acoustic radiation force are inadvisable, and instead, a 2D model is preferred. The results presented here provide valuable insight into the nature and functionality of acoustic microdevices, and should be useful in the interpretation and understanding of the same.
声驱动可用于在微流控系统中执行多项任务。在本文中，我们通过在停流模式下的微观粒子图像测速（micro-PIV）分析和数值模拟来研究一种声分离器，并发现两者之间具有良好的一致性。此外，我们证明仅在流通模式下表征器件是不够的，因为在这些系统中，非常不同的共振模式可能会导致外观相似的带形成。此外，我们得出结论，声辐射力的扩展一维近似是不可取的，相反，二维模型更受青睐。本文给出的结果为声学微器件的性质和功能提供了有价值的见解，并且应该有助于对其进行解释和理解。
