Abstract To elucidate the boiling heat transfer on a biphilic surface, the bubble departure diameter and the bubble location were controlled through the variation of the size and pitch of hydrophobic patterns on the biphilic surface. We postulated that if the average bubble departure diameter can be reduced, both the critical heat flux (CHF) and heat transfer coefficient (HTC) can be enhanced owing to the reduced dry spot area and increased active bubble cycle. The bubble dynamics and boiling performance were evaluated by adjusting the hydrophobic pattern size and the pitch of the biphilic surface using a porous superhydrophobic material with high adhesion to vapor, 14.5% of CHF and 34.1% of HTC in S2P4N64 biphilic surface were enhanced over the bare surface. The bubble departure diameter decreased as the pattern size and pitch decreased, and the CHF was enhanced in inverse proportion to bubble departure diameter. This study indicates that the bubble departure diameter on biphilic surfaces can be controlled according to the intentions of the designer.

中文翻译：

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控制双亲表面上的气泡离开直径，以提高池沸腾传热性能

摘要 为了阐明双亲表面的沸腾传热，通过改变双亲表面疏水图案的大小和间距来控制气泡离开直径和气泡位置。我们假设如果可以减小平均气泡离开直径，由于干点面积减少和气泡活跃周期增加，临界热通量（CHF）和传热系数（HTC）都可以提高。气泡动力学和沸腾性能通过使用对蒸汽具有高粘附性的多孔超疏水材料调整疏水图案尺寸和双亲表面的间距来评估，S2P4N64 亲和表面中 14.5% 的 CHF 和 34.1% 的 HTC 比裸露的表面增强表面。气泡离开直径随着图案尺寸和间距的减小而减小，CHF 与气泡离开直径成反比增加。该研究表明，双亲表面上的气泡离开直径可以根据设计者的意图进行控制。