High-efficiency dropwise condensation on superhydrophobic conical pillar arrays

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-05-09 DOI:10.1016/j.optlastec.2025.113156

Weihao Pan , Changxia Liu , Yushuai Hu , Wen Cai , Defeng Yan , Guanghao Chen , Jiayu Ou , Jing Sun

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Abstract

Inspired by nature, superhydrophobic surfaces with special wettability have received considerable attention and shown great application potential in the field of dropwise condensation. However, existing superhydrophobic surfaces for enhancing the condensation collection rate (CCR) are prone to failure at a high surface subcooling temperature, which severely reduces their CCR and service life. Here, superhydrophobic conical pillar arrays (SCPA) with macro, micro, and nano structures were proposed for dropwise condensation. The effects of the dimensional parameters of the SCPA (spacing, top diameter, and height) on the CCR were systematically investigated. In addition, the CCR of the SCPA was investigated at different humidity and surface subcooling temperatures. Experimental and theoretical analyses show that the SCPA can maintain high CCR (47.2 mg/(cm²·h)) for 2 h at a surface subcooling temperature of 16 K because of the special conical pillar structure, which is higher than that of the superhydrophobic flat surface.

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超疏水锥形柱阵列的高效水滴冷凝

受大自然的启发，具有特殊润湿性的超疏水表面在水滴冷凝领域受到了广泛的关注，并显示出巨大的应用潜力。然而，现有的用于提高冷凝集热率（CCR）的超疏水表面在高表面过冷温度下容易失效，严重降低了其CCR和使用寿命。本文提出了一种具有宏观、微观和纳米结构的超疏水锥形柱阵列（SCPA）。系统地研究了SCPA尺寸参数（间距、顶径和高度）对CCR的影响。此外，还研究了不同湿度和表面过冷温度下SCPA的CCR。实验和理论分析表明，由于特殊的锥形柱结构，SCPA在表面过冷温度为16 K的情况下可以保持2 h的高CCR (47.2 mg/(cm2·h))，高于超疏水平面的CCR。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems