Capillary Liquid Transport on Biomimetic Topological Surfaces for Film Boiling Heat Transfer

被引：0
|
作者：
Yang X. [1 ]
Tang Y. [1 ]
Zhu D. [1 ]
机构：
[1] College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2021年 / 32卷 / 23期
关键词：
Capillary liquid transport; Film boiling; Nanosecond pulsed laser; Sarracenia; Superhydrophilicity;
D O I：
10.3969/j.issn.1004-132X.2021.23.003
中图分类号：
学科分类号：
摘要：
In order to improve the capillary limit of surface structures for enhancing capillary-fed film boiling heat transfer, the microgroove arrays overlaid with microparticle structures were fabricated on titanium substrates by taking advantages of melting and solidification, and phase explosion of nanosecond pulsed lasers. A modified capillary liquid transport characteristic coefficient was developed to characterize the capillary liquid transport capability of the fabricated microgrooves based on flow resistance in open microgrooves model. The results show that the microparticle structures obtained during laser ablation improve the superhydrophilicity as well as the capillary liquid transport capability. The capillary coefficient increases with the decrease of the microgroove width. Moreover, the capillary limit may be further increased by fabricating minor microgrooves at the bottom of the major microgrooves with unique layered capillary transport configuration in imitation of sarracenia trichome. © 2021, China Mechanical Engineering Magazine Office. All right reserved.
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页码：2799 / 2807
页数：8
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