基于平衡分子动力学模拟方法，研究壁面原子与流体原子之间不同的作用势能对纳米通道中二元流体形态和传热特性的影响。对于Ar—Kr流体，Kr原子由于壁面和周围流体原子的作用均匀分散形成混合流体，并且热导率较纯Ar流体略有增大；而对于Ar—Cu流体，Cu原子依靠自身强大的作用聚集一起形成悬浮流体，其热导率较纯Ar流体增加一个数量级。由此可见，不同势能的原子在纳米通道中的存在形式和所引起的流体传热特性不同。
In this paper, effects of atomic potential on configurations and heat transfer characteristics of binary fluids confined in nanoehannels are investigated using equilibrium molecular dynamics (EMD) simulation. For Ar-Kr binary fluids, the Kr atoms spread along the channel forming mixtures owing to the interactions from the wall atoms and the fluid atoms, the thermal conductivity is enhanced slightly compared with that of the pure Ar fluids; while for Ar-Cu binary fluids, tile Cu atoms aggregate together as in nanofluids on their own powerful interactions, the thermal conductivity has a higher enhancement for the strong interactions between the fluid atoms and the wall atoms. In a nanochannel, the difference of the interactions between atoms of fluid and wall results different fluid configurations and heat transfer characteristics.
参考文献
| [1] | J. L. Xu;Z. Q. Zhou .Molecular dynamics simulation of liquid argon flow at platinum surfaces[J].Heat and mass transfer,2004(11):859-869. |
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