Boiling is an efficient heat-transfer mechanism because of the utilization of latent heat of vaporization and has the potential to be used for cooling high-power electronic devices. Surface enhancement is one of the widely used techniques for heat-transfer augmentation in boiling systems. Here, an experimental investigation was conducted on chemical vapor deposition-grown three-dimensional (3D) foamlike graphene-coated silicon surfaces to investigate the effect of pore structures on pool boiling heat transfer and corresponding heat-transfer enhancement mechanisms. 3D graphene-coated samples with four graphene thicknesses were utilized along with a plain surface to investigate boiling heat-transfer characteristics and enhancement mechanisms. A high-speed camera was used to provide a deeper understanding of the bubble dynamics upon departure of emerging bubbles and visualize vapor columns in different boiling regimes. On the basis of the obtained results, in addition to interfacial evaporation, mechanical resonance of the 3D structure had also a considerable effect on vapor column formation. The results indicated that there is an optimum thickness, which exhibits the best performance in terms of boiling heat transfer.

中文翻译：

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涉及相变的冷却系统的泡沫状3D石墨烯涂层

由于利用了汽化潜热，沸腾是一种有效的传热机制，并且具有用于冷却大功率电子设备的潜力。表面增强是沸腾系统中传热增强的广泛使用的技术之一。在此，对化学气相沉积生长的三维（3D）泡沫状石墨烯涂层硅表面进行了实验研究，以研究孔结构对池沸腾传热的影响以及相应的传热增强机制。利用具有四个石墨烯厚度的3D石墨烯涂层样品以及平坦表面来研究沸腾传热特性和增强机理。高速相机用于更深入地了解新兴气泡离开时的气泡动力学，并可视化不同沸腾状态下的蒸气柱。根据所获得的结果，除了界面蒸发之外，3D结构的机械共振对蒸气柱的形成也有相当大的影响。结果表明存在最佳厚度，就沸腾传热而言，该厚度表现出最佳性能。