Gas-liquid two-phase flow patterns in rectangular polymeric microchannels: effect of surface wetting properties.

Gas-liquid two-phase flow patterns in rectangular polymeric microchannels: effect of surface wetting properties.
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DOI:
10.1088/1367-2630/11/7/075034
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发表时间:
2009
影响因子:
3.3
通讯作者:
Takayama S
Takayama S
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Huh D;Kuo CH;Grotberg JB;Takayama S

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在这里,我们映射的气液两相流制度观察到的聚合物微通道具有不同的润湿性能。我们利用视频和共聚焦显微镜检查两相流模式产生的平行注入空气和水通过一个Y形的交界处到一个矩形微通道制成的聚(二甲基硅氧烷)(PDMS)。我们观察到七个流动制度的微通道与疏水壁,而只有两个流动模式被确定在亲水性微通道。我们的研究表明,表面润湿性有深远的影响,空气和水在微通道中移动的空间分布。
Here we map gas–liquid two-phase flow regimes observed in polymeric microchannels with different wetting properties. We utilized video and confocal microscopy to examine two-phase flow patterns produced by parallel injection of air and water through a Y-shaped junction into a rectangular microchannel made of poly(dimethylsiloxane) (PDMS). We observed seven flow regimes in microchannels with hydrophobic walls, whereas only two flow patterns were identified in hydrophilic microchannels. Our study demonstrates that surface wettability has a profound influence on the spatial distribution of air and water moving in microchannels.
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