| 微通道中应用"流动汇聚"形成分散体系 |
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| 引用本文： | Shelley L.Anna,Howard A.Stone,胡国庆.微通道中应用"流动汇聚"形成分散体系[J].力学进展,2008,38(5):627-630. |
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| 作者姓名： | Shelley L.Anna Howard A.Stone 胡国庆 |
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| 作者单位： | Division of Engineering and Applied Sciences,Harvard University,Cambridge Division of Engineering and Applied Sciences,Harvard University,Cambridge Division of Engineering and Applied Sciences,Harvard University,Cambridge |
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| 摘 要： | 在微流控器件内集成具有流动汇聚功能的几何结构以研究液--液系统中液滴的形成.
相图显示液滴的大小为流量以及两种液体流量比的函数, 它包括两个区域,
在一个区域中液滴大小和孔隙宽度接近,
而在另一区域液滴大小则取决于``汇聚'后的细流直径,
从而能形成远小于孔隙的液滴. 单分散和多分散乳状液均可以被生成.
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| 关 键 词： | 微流动 流动汇聚 乳化液 液滴 多相流 |
| 收稿时间： | 2008-08-25 |
FORMATION OF DISPERSIONS USING "FLOW FOCUSING" IN MICROCHANNELS |
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| Institution: | Division of Engineering and Applied Sciences,Harvard University,Cambridge Division of Engineering and Applied Sciences,Harvard University,Cambridge Division of Engineering and Applied Sciences,Harvard University,Cambridge |
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| Abstract: | A flow-focusing
geometry is integrated into a microfluidic device and used to
study drop formation in liquid-liquid systems. A phase diagram
illustrating the drop size as a function of flow rates and
flow rate ratios of the two liquids includes one regime where drop size is comparable to
orifice width
and a second regime where drop size is dictated by the diameter of a thin ``focused' thread,
so drops much smaller than the orifice are formed. Both monodisperse and polydisperse
emulsions can be produced. |
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| Keywords: | microfluidic flow focusing emulsion drop multiphase flow |
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