CIESC Journal ›› 2013, Vol. 64 ›› Issue (2): 476-483.DOI: 10.3969/j.issn.0438-1157.2013.02.010

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Liquid-liquid two-phase viscous flow in coaxial microfluidic device

LAN Wenjie, LI Shaowei, XU Jianhong, LUO Guangsheng   

  1. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2012-07-30 Revised:2012-11-21 Online:2013-02-05 Published:2013-02-05
  • Supported by:

    supported by the National Natural Science Foundation of China (20525622, 20876084) and the National Basic Research Program of China (2007CB714302).

同轴环管微流控设备内液-液两相黏性流体的流动规律

兰文杰, 李少伟, 徐建鸿, 骆广生   

  1. 清华大学化学工程系,化学工程联合国家重点实验室,北京100084
  • 通讯作者: 骆广生
  • 作者简介:兰文杰(1986—),女,博士研究生。
  • 基金资助:

    国家自然科学基金项目(20525622,20876084);国家重点基础研究发展计划项目(2007CB714302)。

Abstract: The flow behavior of polymer solutions with relatively high viscosity in a coaxial micro-channel device was investigated.In the experiment, two kinds of flow patterns, dripping and jetting, could be formed.The jetting regime occurred as flow rate and viscosity of the fluids increased.The influence of two-phase viscosities and flow rates on drop size was investigated.The results could be used to guide the preparation of polymer micro-sized spheres.Mathematic models for predicting drop size in two flow patterns were established separately, and the calculated values fitted experimental results well.

Key words: micro-channel, liquid-liquid micro-dispersion, dripping, jetting

摘要: 进行了同轴环管微流控设备内黏性聚合物溶液的流动行为研究。研究发现通过调节两相流体黏度与流量,可以得到滴流和射流两种稳定流型,并且可以进一步实现液滴尺寸的调控。同时,还分别针对不同流型建立了数学模型用于液滴尺寸预测。所得结果可以用做利用微流控技术制备聚合物微球的理论指导。

关键词: 微流控, 液-液微分散, 滴流, 射流

CLC Number: