期刊
COATINGS
卷 11, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/coatings11020212
关键词
explosive boiling; hybrid wettability; liquid film thickness; structured surfaces
资金
- National Nature Science Foundation Projects of China [52076078, 52090064]
- Science Fund for Creative Research Groups of the National Natural Science Foundation of China [51821004]
The study shows that a hybrid hydrophobic-hydrophilic nanostructured surface can decrease the onset temperature of explosive boiling, with a decrease observed with increasing hydrophobic coating thickness. Additionally, an increase in pillar width and liquid film thickness also leads to a lower onset temperature for explosive boiling on the hybrid wetting surface.
The influence of different wettability on explosive boiling exhibits a significant distinction, where the hydrophobic surface is beneficial for bubble nucleation and the hydrophilic surface enhances the critical heat flux. Therefore, to receive a more suitable surface for the explosive boiling, in this paper a hybrid hydrophobic-hydrophilic nanostructured surface was built by the method of molecular dynamics simulation. The onset temperatures of explosive boiling with various coating thickness, pillar width, and film thicknesses were investigated. The simulation results show that the hybrid nanostructure can decrease the onset temperature compared to the pure hydrophilic surface. It is attributed to the effect of hydrophobic coating, which promotes the formation of bubbles and causes a quicker liquid film break. Furthermore, with the increase of the hydrophobic coating thickness, the onset temperature of explosive boiling decreases. This is because the process of heat transfer between the liquid film and the hybrid nanostructured surface is inevitably enhanced. In addition, the onset temperature of explosive boiling on the hybrid wetting surface decreases with the increase of pillar width and liquid film thickness.
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