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Can Wicking Control Droplet Cooling?
Langmuir ( IF 3.7 ) Pub Date : 2019-04-30 00:00:00 , DOI: 10.1021/acs.langmuir.9b00548 Manuel Auliano 1 , Damiano Auliano 1 , Maria Fernandino 1 , Pietro Asinari 2 , Carlos A. Dorao 1
Langmuir ( IF 3.7 ) Pub Date : 2019-04-30 00:00:00 , DOI: 10.1021/acs.langmuir.9b00548 Manuel Auliano 1 , Damiano Auliano 1 , Maria Fernandino 1 , Pietro Asinari 2 , Carlos A. Dorao 1
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Wicking, defined as absorption and passive spreading of liquid into a porous medium, has been identified as a key mechanism to enhance the heat transfer and prevent the thermal crisis. Reducing the evaporation time and increasing the Leidenfrost point (LFP) are important for an efficient and safe design of thermal management applications, such as electronics, nuclear, and aeronautics industry. Here, we report the effect of the wicking of superhydrophilic nanowires (NWs) on the droplet vaporization from low temperatures to temperatures above the Leidenfrost transition. By tuning the wicking capability of the surface, we show that the most wickable NW results in the fastest evaporation time (reduction of 82, 76, and 68% compared with a bare surface at, respectively, 51, 69, and 92 °C) and in one of the highest shifts of the LFP of a water droplet (5 μL) in the literature (about 260 °C).
中文翻译：
芯吸可以控制液滴冷却吗？
芯吸被定义为吸收和被动扩散到多孔介质中的芯吸，已被确认为增强传热和防止热危机的关键机制。减少蒸发时间并提高莱顿弗罗斯特点（LFP）对于热管理应用（例如电子，核能和航空工业）的高效安全设计至关重要。在这里，我们报告了超亲水纳米线（NWs）的芯吸作用对从低温到莱顿弗罗斯特转变温度以上的液滴蒸发的影响。通过调整表面的芯吸能力，我们显示出最易芯吸的净重导致最快的蒸发时间（与裸露表面分别为51、69和82相比，减少了82％，76％和68％。
更新日期：2019-04-30
中文翻译：
芯吸可以控制液滴冷却吗？
芯吸被定义为吸收和被动扩散到多孔介质中的芯吸，已被确认为增强传热和防止热危机的关键机制。减少蒸发时间并提高莱顿弗罗斯特点（LFP）对于热管理应用（例如电子，核能和航空工业）的高效安全设计至关重要。在这里，我们报告了超亲水纳米线（NWs）的芯吸作用对从低温到莱顿弗罗斯特转变温度以上的液滴蒸发的影响。通过调整表面的芯吸能力，我们显示出最易芯吸的净重导致最快的蒸发时间（与裸露表面分别为51、69和82相比，减少了82％，76％和68％。
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