The effect of femtosecond laser fluence and pitches between V-shaped microgrooves on the dynamics of capillary flow

doi:10.1016/j.rinp.2020.103606

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	The effect of femtosecond laser fluence and pitches between V-shaped microgrooves on the dynamics of capillary flow
	F. Xie,J. J. Yang and C. V. Ngo
刊名	Results in Physics
	2020
卷号	19 页码:8
ISSN号	2211-3797
DOI	10.1016/j.rinp.2020.103606
英文摘要	Open microgroove is one kind of capillary-driven superwicking surface structure. In this study, arrays of parallel V-shaped microgrooves were fabricated on an aluminum surface by using a femtosecond laser to obtain a superwicking surface which can quickly transport the water uphill against gravity. The relationships between the flowing time and flowing distance were investigated and compared with theoretical results. We demonstrated both laser fluence and scanning step size can affect the superwicking performance. The aluminum surfaces fabricated at a laser fluence of 18.49 J/cm(2) and 52.67 J/cm(2) showed the best superwicking performances with the average water flow velocities approximately 16.2 mm/s and 16.4 mm/s, respectively, in the distance of 30 mm. On the other hand, the superwicking surfaces show an anisotropic flow characteristic due to the parallel microgrooves structure. However, when the scanning step size drops to 25 mu m, the surface will form irregular rough structures that result in the isotropic flow characteristics. Moreover, by using a thermal camera, we found that after a 10 mu L water droplet was dropped into the heated surface, the superwicking surface temperature quickly dropped from 92.4 degrees C to 82.5 degrees C which indicated that laser processing of the superwicking surface has potential application in heat dissipation.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/64470]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	F. Xie,J. J. Yang and C. V. Ngo. The effect of femtosecond laser fluence and pitches between V-shaped microgrooves on the dynamics of capillary flow[J]. Results in Physics,2020,19:8.
APA	F. Xie,J. J. Yang and C. V. Ngo.(2020).The effect of femtosecond laser fluence and pitches between V-shaped microgrooves on the dynamics of capillary flow.Results in Physics,19,8.
MLA	F. Xie,J. J. Yang and C. V. Ngo."The effect of femtosecond laser fluence and pitches between V-shaped microgrooves on the dynamics of capillary flow".Results in Physics 19(2020):8.