Three-dimensional numerical simulation and experimental investigation of boundary-driven streaming in surface acoustic wave microfluidics.
Three-dimensional numerical simulation and experimental investigation of boundary-driven streaming in surface acoustic wave microfluidics.
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声表面波微流控边界驱动流动的三维数值模拟与实验研究
DOI：
10.1039/c8lc00589c
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发表时间：
2018-12-07
期刊：
影响因子：
6.1
通讯作者：
Huang TJ
中科院分区：
文献类型：
--
作者：
Chen C;Zhang SP;Mao Z;Nama N;Gu Y;Huang PH;Jing Y;Guo X;Costanzo F;Huang TJ
声流已被广泛用于微流体中以操纵各种微/纳米物体。在这项工作中，激发叉指换能器（IDT）在高粘度油中的声流的数值和实验研究。特别是，我们开发了一种称为“滑移速度方法”的建模策略，该方法可以在大范围（4×4×2 mm 3）和高频率（23.9 MHz）下对表面声波微流体进行3D模拟。实验和数值计算结果均表明，在油膜顶部，所有的声学流线都会聚在叉指换能器对称两侧上方的两个水平驻点处。在这两个滞流点，漂浮在油上的水滴可以被捕获。基于声流场的这些特性，我们设计了一种在128°YX LiNbO 3基片上集成IDT阵列的声表面波微流控器件，实现了可编程的非接触式液滴操纵。通过相应地激活IDT，油上的水滴可以移动到相应的捕集器。凭借其以高度可编程、可控的方式操纵液滴的出色能力，我们的表面声波微流体器件对于片上非接触式样品处理和化学反应非常有价值。图形内容输入：我们研究了三维声流的IDT浸在油中激活的实验研究和数值模拟使用的建模策略称为“滑移速度法”。
Acoustic streaming has been widely used in microfluidics to manipulate various micro-/nano-objects. In this work, acoustic streaming activated by interdigital transducers (IDT) immersed in highly viscous oil is studied numerically and experimentally. In particular, we developed a modeling strategy termed the “slip velocity method” that enables a 3D simulation of surface acoustic wave microfluidics in a large domain (4×4×2 mm3) and at a high frequency (23.9 MHz). The experimental and numerical results both show that on top of the oil, all the acoustic streamlines converge at two horizontal stagnation points above the two symmetric sides of the IDT. At these two stagnation points, water droplets floating on the oil can be trapped. Based on these characteristics of the acoustic streaming field, we designed a surface acoustic wave microfluidic device with an integrated IDT array fabricated on a 128°YX LiNbO3 substrate to perform programmable, contactless droplet manipulation. By activating IDTs accordingly, the water droplets on the oil can be moved to the corresponding traps. With its excellent capability for manipulating droplets in a highly programmable, controllable manner, our surface acoustic wave microfluidic devices are valuable for on-chip contactless sample handling and chemical reactions. Graphic Content Entry: We investigated the 3D acoustic streaming activated by the IDT immersed in the oil by experimental investigation and numerical simulation using the modeling strategy termed “slip velocity method”.
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影响因子：
2.8
作者：
Ahmed, Daniel;Mao, Xiaole;Huang, Tony Jun
通讯作者：
Huang, Tony Jun
影响因子：
6.1
作者：
Huang PH;Nama N;Mao Z;Li P;Rufo J;Chen Y;Xie Y;Wei CH;Wang L;Huang TJ
通讯作者：
Huang TJ
影响因子：
6.1
作者：
Lei, Junjun;Hill, Martyn;Glynne-Jones, Peter
通讯作者：
Glynne-Jones, Peter
影响因子：
4.6
作者：
Lei, Junjun;Glynne-Jones, Peter;Hill, Martyn
通讯作者：
Hill, Martyn
影响因子：
4.6
作者：
Meacham, JM;Varady, MJ;Fedorov, AG
通讯作者：
Fedorov, AG