Two regimes of thermal resistance at a liquid-solid interface
Two regimes of thermal resistance at a liquid-solid interface
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DOI：
10.1063/1.1525806
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发表时间：
2003
影响因子：
4.4
通讯作者：
L. Xue;P. Keblinski;S. Phillpot;Stephen U. S. Choi;J. Eastman
中科院分区：
文献类型：
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作者：
L. Xue;P. Keblinski;S. Phillpot;Stephen U. S. Choi;J. Eastman
使用非平衡态分子动力学模拟，其中施加温度梯度，我们确定的模型液-固界面的热阻。我们的模拟表明，液体和固体原子之间的结合强度起着关键作用，在确定界面热阻。此外，我们发现，液体-固体相互作用的强度的热阻的功能依赖表现出两个不同的制度：（i）指数依赖弱键（非润湿液体）和（ii）幂律依赖强键（润湿液体）。Kapitza电阻的两个制度的识别具有深刻的影响，理解和设计的纳米复合材料的热性能。
Using nonequilibrium molecular dynamics simulations in which a temperature gradient is imposed, we determine the thermal resistance of a model liquid-solid interface. Our simulations reveal that the strength of the bonding between liquid and solid atoms plays a key role in determining interfacial thermal resistance. Moreover, we find that the functional dependence of the thermal resistance on the strength of the liquid-solid interactions exhibits two distinct regimes: (i) exponential dependence for weak bonding (nonwetting liquid) and (ii) power law dependence for strong bonding (wetting liquid). The identification of the two regimes of the Kapitza resistance has profound implications for understanding and designing the thermal properties of nanocomposite materials.