Wettability is known to play a major role in enhancing pool boiling heat transfer. In this context bioinspired surfaces can bring significant advantages in pool boiling applications. This work addresses a numerical investigation of bubble growth and detachment on a biphilic surface pattern, namely in a superhydrophobic region surrounded by a hydrophilic region. Surface characteristics resemble bio-inspired solutions explored in our research group, mainly considering the main topographical characteristics. This numerical approach is intended to provide additional information to an experimental approach, allowing to obtain temperature, pressure and velocity fields in and around the bubble, which help to describe bubble dynamics. The model was validated based on experimental data obtained with extensive image processing of synchronized high-speed video and high-speed thermographic images. The results obtained here clearly evidence that combining enhanced direct numerical simulations with high-resolution transient experimental measurements is a promising tool to describe the complex and intricate hydrodynamic and heat transfer phenomena governing pool boiling on heated biphilic surfaces.

中文翻译：

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双亲表面上的气泡动力学和传热：实验和数值模拟

已知润湿性在增强池沸腾热传递中起主要作用。在这种情况下，受生物启发的表面可以在池沸腾应用中带来显着的优势。这项工作解决了在双亲表面图案上，即在被亲水区域包围的超疏水区域中气泡生长和脱离的数值研究。表面特征类似于我们研究小组探索的生物启发解决方案，主要考虑主要地形特征。这种数值方法旨在为实验方法提供更多信息，从而允许获得气泡内部及其周围的温度，压力和速度场，从而有助于描述气泡动力学。基于对同步高速视频和高速热成像图像进行大量图像处理而获得的实验数据，对模型进行了验证。此处获得的结果清楚地证明，将增强的直接数值模拟与高分辨率的瞬态实验测量相结合是描述控制加热的双亲表面上池沸腾的复杂而复杂的流体动力学和传热现象的有前途的工具。