摘要
为实现液滴在三维空间内的形状控制,实验制备具有三角形图案的双浸润性表面,通过固定纳米流体液滴的接触线,在低温台上观察其凝固的过程,得到液滴高度和凝固后平台形状之间的变化规律,并通过Surface Evolver模拟液滴在复杂约束性表面上的形态。研究结果表明:被三角形接触线固定的纳米流体液滴,凝固后平台形状随着高度的增加依次经历了三角形、圆形、反三角和圆形,通过模拟值和实验值的对比,认为复杂约束表面上的液滴可以被看作是具有不同接触半径的接触球,在给定液滴高度的情况下,会产生不同大小的顶部平台,这些尺寸的变化将决定凝固后最终顶部平台的形状。通过简单地调节液滴高度就能得到液滴凝固后丰富的形状变化,简化了三维结构制造流程,从而显著提高经济效益。
In order to achieve the shape control of droplets in three-dimensional space,wettability heterogeneous surfaces with a triangle pattern were prepared,the variation pattern between the droplet height and the shape of the solidified platform was obtained by fixing the contact line and observing the solidification process of nanofluid on the cryostat,the morphology of droplets on complex constrained surfaces was also simulated by Surface Evolver.The result indicates that the platform shape of the solidified nanofluid droplet fixed by the triangular contact line undergoes a sequence of triangular,circular,inverse triangular and circular shapes as the height increases.The droplets on complex constrained surfaces can be considered as spherical caps with different contact radius through the comparison between the simulated values and the experimental values.There are different sizes of plateaus for given the droplet heights,and the variations of plateau size will finally determine the shape of the final plateaus after solidification.This method allows for various shape of the solidified droplet by simply adjusting the height of the droplet,which simplifies the manufacturing process of three-dimensional structures and improves the economic efficiency profoundly.
作者
姜芋鹏
张瑞敏
赵玉刚
JIANG Yupeng;ZHANG Ruimina;ZHAO Yugang(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Key Laboratory of Icing and Anti/De-icing,China Aerodynamics Research and Development Center,Mianyang 621000,Sichuan Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2024年第6期53-57,69,共6页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(52276079)。
关键词
纳米流体
接触线
液滴凝固
形状控制
三维结构
nanofluid
contact lines
droplet solidification
shape control
three-dimensional structure
作者简介
姜芋鹏(1999-),男,硕士,研究方向为微纳米流体,电话:13654671267,E-mail:1304119100@qq.com;通信联系人:赵玉刚,男,博士,副教授,研究方向为结冰和防除冰技术,电话:13564594769,E-mail:ygzhao@usst.edu.cn。
