Rapid thermal transport at rough solid-fluid interface: Evaporation and explosive boiling on concave nanostructure
Rapid thermal transport at rough solid-fluid interface: Evaporation and explosive boiling on concave nanostructure
复制标题
粗糙固液界面的快速热传输:凹面纳米结构上的蒸发和爆炸沸腾
DOI:
10.1016/j.ijheatmasstransfer.2020.119676
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发表时间:
2020-06
影响因子:
5.2
通讯作者:
Liu Zhenyu
中科院分区:
文献类型:
--
作者:
Liu Runkeng;Liu Zhenyu
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.
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