Experimental Study of Droplet Impacts on Inclined Surfaces with Different Wettability at Different Temperatures
Superhydrophobic surfaces, as a new type of green materials, show certain application prospects in the field of anti-/de-icing. In this paper, the kinetic behaviour of impinging droplets on surfaces with different temperatures (16~-25 °C), different inclination angles (0~60°) and different wettabili...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2025-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails?columnId=78261635&Fpath=home&index=0 |
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| Summary: | Superhydrophobic surfaces, as a new type of green materials, show certain application prospects in the field of anti-/de-icing. In this paper, the kinetic behaviour of impinging droplets on surfaces with different temperatures (16~-25 °C), different inclination angles (0~60°) and different wettability (hydrophilic and superhydrophobic surfaces) is investigated through experimental comparisons, and the variations of the droplet morphology, spreading factor, spreading time and contact time are analysed. The results show that the impinging droplets exhibit different kinetic behaviours after spreading due to the different inclination angles and wettability; the maximum spreading factor and spreading time on the hydrophilic surfaces increase with the increase of inclination angle, and the variation of the spreading time on the superhydrophobic surfaces is the same as that of the hydrophilic surfaces, and the maximum spreading factor decreases with the increase of the inclination angle, especially at Ts＞-25 ℃; in comparison with the hydrophilic surfaces, the Compared with the hydrophilic surface, the impinging droplets have shorter spreading time on the superhydrophobic surface, which can reach about 10 times at Ts=-25 °C; increasing the wall inclination angle breaks the symmetric bounce of the droplets on the horizontal superhydrophobic surface, which in turn shortens the contact time of the droplets, suggesting that the increase of inclination angle can inhibit the freezing of water droplets effectively. |
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| ISSN: | 0253-4339 |