Characteristics of the IR Laser Photothermally Induced Phase Change in Microchannels with Different Depths
Characteristics of the IR Laser Photothermally Induced Phase Change in Microchannels with Different Depths
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不同深度微通道中红外激光光热致相变特性
DOI：
10.1021/acs.iecr.6b00648
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发表时间：
2016-07
影响因子：
4.2
通讯作者：
Li, Shuzhe
中科院分区：
文献类型：
--
作者：
Liao, Qiang;An, Liang;Wang, Zhibin;Li, Shuzhe
光热效应引起的相变是光流体学中的一个重要现象。因此，在这项工作中，在低和高激光功率下的1550 nm的红外激光诱导的不同深度的微通道中的相变的特性进行了可视化研究。结果表明，在较低的激光功率下，无论微通道的深度如何，液体都可以通过诱导蒸发-冷凝-聚结过程向前推进，起到微泵的作用。μ-PIV测试结果进一步证实了聚结是界面推进的主要机制。有趣的是，虽然大的深度增加了激光的吸收长度，从而提高了温度，增强了蒸发，推进效果变得很弱，由于流动阻力和液态水含量的增加被驱动。在高激光功率下，对于小深度的微通道，液体在初始阶段被推进。一旦一个液体鼻涕虫单独...
The photothermal effect induced phase change is an important phenomenon in optofluidics. In this work, therefore, the characteristics of the phase change in microchannels with different depths induced by a 1550 nm infrared laser under both low and high laser powers was visually studied. It was revealed that at low laser power, the liquid body could be always advanced as a result of the induced evaporation–condensation–coalescence process regardless of the microchannel depth, which can function as a micro pump. The μ-PIV testing results further demonstrated the coalescence was a dominant mechanism in the interface advancement. Interestingly, although large depth increased the absorption length of the laser and thus improved the temperature and enhanced the evaporation, the advancing effect became weak due to the increase of both the flow resistance and liquid water content to be driven. At high laser power, for small depth microchannel, the liquid body was advanced at the beginning. Once a liquid slug alon...
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影响因子：
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DOI：
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发表时间：
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影响因子：
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