Dropwise condensation heat transfer on vertical superhydrophobic surfaces with gradient microgrooves in humid air
Dropwise condensation heat transfer on vertical superhydrophobic surfaces with gradient microgrooves in humid air
复制标题
潮湿空气中梯度微槽垂直超疏水表面滴滴冷凝传热
DOI：
10.1016/j.ijheatmasstransfer.2022.123583
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发表时间：
2023-02
影响因子：
5.2
通讯作者：
Zilong Deng
中科院分区：
文献类型：
--
作者：
Suchen Wu;Shangwen Gao;He Wang;Zilong Deng
液滴自推进去除对强化凝结换热性能具有重要作用。在这里，受仙人掌刺尖的启发，我们设计并制造了一个梯度槽超疏水表面。建立了湿空气中液滴在垂直梯度槽型超疏水表面上的流动和传热可视化实验系统。对滴状冷凝进行了分析，并与平面和方形槽超疏水表面的冷凝进行了比较。结果表明，随着过冷度的增加，梯度槽超疏水表面的冷凝热流密度最大。在双拉普拉斯诱导跳跃和重力驱动滑动去除的协同作用下，梯度槽有利于凝结液滴的离开，即使在较高的过冷度。双Laplace诱导跳跃具有较大的驱动力，引导较小的液滴脱离直径和较小的初始速度与壁面夹角，有效地改善了表面更新，进一步强化了表面换热。
Self-propelled droplet removal contributes vitally to the enhancement of condensation heat transfer performance. Here, inspired by the prickle tip of the cactus, we design and fabricate a gradient groove superhydrophobic surface. A visualization system in humid air has been established to investigate the droplet dynamic behaviors and heat transfer performance on the vertical gradient groove superhydrophobic surface. The dropwise condensation is also analyzed and compared to that on the plane and square groove superhydrophobic surfaces. The results indicate that the gradient groove superhydrophobic surface has the highest condensation heat flux among the three mentioned superhydrophobic surfaces with the increasing subcooling. The gradient grooves facilitate the condensed droplets departure under the synergistic effect of the dual-Laplace induced jumping and gravity-driven sliding removal even at higher subcooling. The dual-Laplace induced jumping possesses greater driving force, conducting the smaller droplet departure diameter and smaller angle between initial velocity and surface wall, which effectively improves the surface refreshment and further strengthens the surface heat transfer.
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DOI：
10.1007/bf02641051
发表时间：
1930-02
期刊：
Technische Mechanik und Thermodynamik
影响因子：
--
作者：
E. Schmidt;W. Schurig;W. Sellschopp
通讯作者：
E. Schmidt;W. Schurig;W. Sellschopp
DOI：
10.1016/j.ijheatmasstransfer.2017.11.139
发表时间：
2018-04
影响因子：
5.2
作者：
Yajing Zhao;D. J. Preston;Zhengmao Lu;Lenan Zhang;John Queeney;E. Wang
通讯作者：
Yajing Zhao;D. J. Preston;Zhengmao Lu;Lenan Zhang;John Queeney;E. Wang
影响因子：
6.4
作者：
Wen, Rongfu;Lan, Zhong;Ma, Xuehu
通讯作者：
Ma, Xuehu
影响因子：
6.7
作者：
G. U. Kumar;D. V. Krishnan;S. Suresh;M. Thansekhar;R. V. Prasanna;M. Jubal
通讯作者：
G. U. Kumar;D. V. Krishnan;S. Suresh;M. Thansekhar;R. V. Prasanna;M. Jubal
影响因子：
17.1
作者：
Yan, Xiao;Qin, Yimeng;Miljkovic, Nenad
通讯作者：
Miljkovic, Nenad