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首页> 外文期刊>International Journal of Heat and Mass Transfer >Significantly enhanced convective heat transfer through surface modification in nanochannels
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Significantly enhanced convective heat transfer through surface modification in nanochannels

机译：通过纳米通道中的表面改性显着增强了对流换热

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The subject of convective heat transfer in micro-ano-scale channels is of utmost importance for the effective cooling of small-scale electronic devices with high power density. The overall heat convection in these channels largely depends on interfacial (wall-fluid) thermal transport. In this work, we demonstrate that a carefully designed surface topology can enhance heat dissipation in nanochannels. Specifically, we found that both uniformly and randomly distributed surface roughness can substantially increase the overall heat transfer between the wall and fluid in the nanochannels. Moreover, we reveal that depositing a coating layer, of which the vibrational density of states bridge those of the walls and the flowing fluid, can significantly enhance wall-fluid interfacial heat transfer. This work reveals the critical effect of surface topology and material choice of the channel wall on heat dissipation in nanochannels, which is important for the cooling of small-scale devices. (C) 2019 Elsevier Ltd. All rights reserved.
机译：在微米/纳米级通道中对流传热的主题对于有效冷却具有高功率密度的小型电子设备至关重要。这些通道中的整体热对流很大程度上取决于界面（壁流体）的热传递。在这项工作中，我们证明了精心设计的表面拓扑可以增强纳米通道中的散热。具体而言，我们发现均匀且随机分布的表面粗糙度都可以大大增加纳米通道内壁与流体之间的整体热传递。而且，我们揭示出沉积涂层，其状态的振动密度桥接了壁和流动流体的振动密度，可以显着增强壁-流体界面传热。这项工作揭示了表面拓扑结构和通道壁材料选择对纳米通道散热的关键影响，这对于小型设备的冷却非常重要。 （C）2019 Elsevier Ltd.保留所有权利。

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