原子間力顕微鏡による三相界線ナノ構造のダイナミック解析

使用原子力显微镜对三相场线纳米结构进行动态分析

• 批准号: 21K14097
• 负责人: 王 振英
• 金额: $ 3万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-02-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K14097/
• 关键词: wetting dynamics; three phase contact line; droplet evaporation; capillary force; Marangoni flow; Three phase contact line; Nanostructure; Atomic Force Microscope; Precursor film; Wetting and spreading

Extensive investigations have been carried out on the wetting dynamics of evaporative droplets, as the fact that the spreading and flow transition in volatile droplets remains controversial due to the complexity added by interfacial phase change and non-equilibrium thermal transport. We show, using both mathematical modeling and experiments, that the wetting dynamics of volatile droplets can be scaled by the spatial temporal interplay between capillary, evaporation, and thermal Marangoni effects. We quantify these complex interactions using phase diagrams based on detailed theoretical and experimental analyses. We further illustrate the spreading law of droplets by generalizing Tanner’s law (valid for non-volatile liquids) to a full range of liquids with saturation vapor pressure spanning from 101 to 104 Pa and on substrates with thermal conductivity spanning from 10-1 to 103 W/m/K. Besides its importance in fluid-based industries, the conclusions also enable a unifying explanation to a series of individual works including the criterion of flow reversal and the state of dynamic wetting, making it possible to control liquid transport in diverse application scenarios. The findings to date have been summarized and will be submitted recently.

蒸发液滴的润湿动力学已经进行了广泛的研究，因为挥发性液滴中的扩散和流动转变由于界面相变和非平衡热传输增加的复杂性而仍然存在争议。我们表明，使用数学建模和实验，挥发性液滴的润湿动力学可以缩放毛细管，蒸发和热Marangoni效应之间的时空相互作用。我们量化这些复杂的相互作用，使用相图的基础上详细的理论和实验分析。我们通过将坦纳定律（对非挥发性液体有效）推广到饱和蒸气压从10-1 Pa到104 Pa的全范围液体和热导率从10-1 W/m/K到103 W/m/K的基板上，进一步说明了液滴的扩散定律。除了其在基于流体的工业中的重要性之外，这些结论还能够对一系列单独的工作进行统一的解释，包括流动逆转的标准和动态润湿的状态，从而可以在不同的应用场景中控制液体输送。迄今为止的调查结果已作了总结，并将于最近提交。

项目成果

Quantitative analysis on the interacting mechanisms in wetting dynamics of sessile volatile droplets

固着挥发性液滴润湿动力学相互作用机制的定量分析

• 发表时间: 2022
• 作者: Zhenying Wang;George Karapetsas;Prashant Valluri;Inoue Chihiro
• 通讯作者: Inoue Chihiro

Quantifying the interacting mechanisms in shape evolution of sessile volatile droplets

量化固着挥发性液滴形状演化的相互作用机制

• 发表时间: 2022
• 作者: Zhenying Wang;George Karapetsas;Prashant Valluri;Inoue Chihiro
• 通讯作者: Inoue Chihiro

Parametric analysis of interfacial friction factor for liquid film dynamics sheared by turbulent gas flow

• DOI: 10.38036/jgpp.13.3_1
• 发表时间: 2022-11
• 期刊: International Journal of Gas Turbine, Propulsion and Power Systems
• 作者: T. Inoue;Y. Kamada;C. Inoue;Zhenying Wang

Fragmentation and solidification of fusible alloy melt by water spray

• DOI: 10.1016/j.powtec.2022.117778
• 发表时间: 2022-08
• 期刊: Powder Technology
• 影响因子: 5.2
• 作者: Wataru Hikita;Shodai Hirayama;C. Inoue;Zhen-yu Wang;M. Nakaseko;Takuya Takashita

University of Edinburgh(英国)

爱丁堡大学（英国）