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首页> 外文期刊>International Journal of Heat and Mass Transfer >Rapid thermal transport at rough solid-fluid interface: Evaporation and explosive boiling on concave nanostructure
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Rapid thermal transport at rough solid-fluid interface: Evaporation and explosive boiling on concave nanostructure

机译：粗固液界面的快速热运输：凹陷纳米结构上的蒸发和爆炸性沸腾

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摘要

The concave nanostructure presents a better boiling performance compared to convex one, however, the surface roughness plays a key role in thermal transport at solid-fluid interface. In this work, we adopted the non-equilibrium molecular dynamics simulation to investigate the effect of the internal surface roughness on the boiling heat transfer performance in concave nanostructure. It shows that the presence of atomic-scale roughness leads to heat transfer deterioration and enhancement during the evaporation and the explosive boiling processes, respectively. This finding, which is contradictory with the general understanding, is attributed to the difference in interfacial thermal resistance. It shows that the heat transfer performance is strongly dependent on the configuration of roughness elements. The low solid fraction configuration has a better heat transfer performance and can postpone the start of boiling process.
机译：与凸起相比，凹入纳米结构呈现更好的沸腾性能，然而，表面粗糙度在固体流体界面处的热传输中起着关键作用。在这项工作中，我们采用了非平衡的分子动力学模拟，以研究内表面粗糙度对凹入纳米结构沸腾传热性能的影响。它表明，在蒸发和爆炸性沸腾过程中，存在原子垢粗糙度的存在导致传热劣化和增强。这一发现与一般理解相互矛盾，归因于界面热阻的差异。结果表明，传热性能强烈取决于粗糙度元素的配置。低固体馏分配置具有更好的传热性能，可以推迟沸腾过程的开始。

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