超疏水表面：从自然到通过体积-of-流体（VOF）模拟的仿生

Superhydrophobic surfaces: From nature to biomimetic through VOF simulation.

作者信息

Liu Chunbao, Zhu Ling, Bu Weiyang, Liang Yunhong

机构信息

School of Mechanical Science and Engineering, Jilin University, Changchun 130022, China; Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China; State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China.

School of Mechanical Science and Engineering, Jilin University, Changchun 130022, China.

出版信息

Micron. 2018 Apr;107:94-100. doi: 10.1016/j.micron.2018.01.013. Epub 2018 Feb 9.

DOI:10.1016/j.micron.2018.01.013

PMID:29482103

Abstract

The contact angle, surface structure and chemical compositions of Canna leaves were investigated. According to the surface structure of Canna leaves which observed by Scanning Electron Microscopy(SEM), the CFD (Computational Fluid Dynamics)model was established and the method of volume of fluid (VOF) was used to simulate the process of droplet impacting on the surface and established a smooth surface for comparison to verify that the surface structure was an important factor of the superhydrophobic properties. Based on the study of Canna leaf and VOF simulation of its surface structure, the superhydrophobic samples were processed successfully and showed a good superhydrophobic property with a contact angle of 156 ± 1 degrees. A high-speed camera (5000 frames per second) was used to assess droplet movement and determine the contact time of the samples. The contact time for the sample was 13.1 ms. The results displayed that the artificial superhydrophobic surface is perfect for the performance of superhydrophobic properties. The VOF simulation method was efficient, accurate and low cost before machining artificial superhydrophobic samples.

摘要

对美人蕉叶片的接触角、表面结构和化学成分进行了研究。根据扫描电子显微镜（SEM）观察到的美人蕉叶片表面结构，建立了计算流体动力学（CFD）模型，并采用流体体积法（VOF）模拟液滴撞击表面的过程，同时建立了一个光滑表面进行对比，以验证表面结构是超疏水性能的一个重要因素。基于对美人蕉叶片及其表面结构的VOF模拟研究，成功制备了超疏水样品，其接触角为156±1度，表现出良好的超疏水性能。使用高速摄像机（每秒5000帧）评估液滴运动并确定样品的接触时间。样品的接触时间为13.1毫秒。结果表明，人工超疏水表面具有优异的超疏水性能。在加工人工超疏水样品之前，VOF模拟方法高效、准确且成本低。