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Vibration-enhanced condensation heat transfer on superhydrophobic surfaces: An experimental study
Aip Advances ( IF 1.6 ) Pub Date : 2020-09-18 , DOI: 10.1063/5.0020139
Mostafa Moradi 1 , Seyed Farshid Chini 1 , Mohammad Hassan Rahimian 1
Affiliation  

Experiments were carried out to investigate the effects of mechanical vibration on water condenser performance on uncoated, superhydrophilic, and superhydrophobic aluminum. It was shown that the superhydrophobic surface increases the condensation rate by 30%. However, vibration under a constant frequency (in the range of 60 Hz–160 Hz), regardless of surface wettability, does not significantly improve the condensation rate as only few drops get resonated and removed at that specific frequency (the drop’s natural frequency depends on the drop size and increases for smaller drops). By applying a cyclic variable frequency with a peak of 132 Hz, shedding events on the superhydrophobic surface increased by 120%, which leads to a 15% increase in condensation. The findings of this study demonstrate that applying vibration with a variable frequency is a simple and cost-effective method for heat transfer enhancement on superhydrophobic surfaces.

中文翻译:

超疏水表面上振动增强的冷凝传热:实验研究

进行了实验,以研究机械振动对无涂层,超亲水和超疏水铝上水冷凝器性能的影响。结果表明,超疏水表面使缩合率提高了30%。但是,在恒定频率(60 Hz–160 Hz范围内)下的振动(无论表面可湿性如何)都不会显着提高冷凝速率,因为只有少数液滴在该特定频率下发生共振并被去除(液滴的固有频率取决于液滴的大小,对于较小的液滴则增加)。通过应用峰值为132 Hz的循环可变频率,超疏水表面的脱落事件增加了120%,这导致冷凝现象增加了15%。
更新日期:2020-09-30
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