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Mixing high-viscosity fluids via acoustically driven bubbles.
Journal of Micromechanics and Microengineering ( IF 2.3 ) Pub Date : 2017-01-01
Sinem Orbay 1 , Adem Ozcelik 2 , James Lata 2 , Murat Kaynak 2 , Mengxi Wu 2 , Tony Jun Huang 1, 2
Affiliation  

We present an acoustofluidic micromixer which can perform rapid and homogeneous mixing of highly viscous fluids in the presence of an acoustic field. In this device, two high-viscosity polyethylene glycol (PEG) solutions were co-injected into a three-inlet PDMS microchannel with the center inlet containing a constant stream of nitrogen flow which forms bubbles in the device. When these bubbles were excited by an acoustic field generated via a piezoelectric transducer, the two solutions mixed homogenously due to the combination of acoustic streaming, droplet ejection, and bubble eruption effects. The mixing efficiency of this acoustofluidic device was evaluated using PEG-700 solutions which are ~106 times more viscous than deionized (DI) water. Our results indicate homogenous mixing of the PEG-700 solutions with a ~0.93 mixing index. The acoustofluidic micromixer is compact, inexpensive, easy to operate, and has the capacity to mix highly viscous fluids within 50 milliseconds.

中文翻译:

通过声学驱动的气泡混合高粘度流体。

我们提出了一种声流体微混合器,它可以在存在声场的情况下对高粘度流体进行快速而均匀的混合。在此设备中,将两种高粘度聚乙二醇(PEG)溶液共注入一个三入口PDMS微通道中,中心入口包含恒定的氮气流,该氮气流在设备中形成气泡。当这些气泡被通过压电换能器产生的声场激发时,由于声流,液滴喷射和气泡喷出效应的结合,两种溶液均匀混合。使用PEG-700溶液评估了该声流装置的混合效率,该溶液的粘度是去离子(DI)水的〜106倍。我们的结果表明PEG-700溶液的混合均匀,混合指数约为0.93。
更新日期:2019-11-01
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