Thermal boundary resistance from mode energy relaxation times: Case study of argon-like crystals by molecular dynamics
Thermal boundary resistance from mode energy relaxation times: Case study of argon-like crystals by molecular dynamics
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DOI：
10.1063/1.3500526
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发表时间：
2010-11
影响因子：
3.2
通讯作者：
A. Rajabpour;S. Volz
中科院分区：
文献类型：
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作者：
A. Rajabpour;S. Volz
本文导出了具有温差ΔT的两物体间边界热阻的模谱。定义电阻的时间τ的一般表达式推导为ΔT随时间积分的平衡自相关。这种自相关的进一步分解产生的电阻谱等于模式的弛豫时间加权其能量均方波动。然后，我们进行分子动力学模拟的平衡态和非平衡态的制度，以证明我们的模型的相关性的氩晶体。这种通用方法允许导出阻力谱，因此可以产生控制交换的热通量的关键规则。
We derive the mode spectrum of the thermal boundary resistance between two bodies having a temperature difference ΔT. A general expression of the time τ that defines the resistance is derived as the equilibrium autocorrelation of ΔT integrated over time. A further decomposition of this autocorrelation yields the resistance spectrum as equal to the mode relaxation time weighted by its energy mean square fluctuation. We then perform molecular dynamics simulations of argon like crystals in equilibrium and nonequilibrium regimes to prove the relevance of our model. This general method allows for deriving the resistance spectrum and therefore can yield key rules to control the exchanged heat flux.