Molecular dynamics study of thermal phenomena in an ultrathin liquid film sheared between solid surfaces: the influence of the crystal plane on energy and momentum transfer at solid-liquid interfaces.
Molecular dynamics study of thermal phenomena in an ultrathin liquid film sheared between solid surfaces: the influence of the crystal plane on energy and momentum transfer at solid-liquid interfaces.
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DOI：
10.1063/1.1902950
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发表时间：
2005-06
期刊：
影响因子：
--
通讯作者：
T. Ohara;D. Torii
中科院分区：
文献类型：
--
作者：
T. Ohara;D. Torii
对运动固壁间剪切液膜进行了分子动力学研究。研究了在类库埃特流中发生的热现象，包括从宏观流动能量到热能的能量转换，即，宏观意义上的粘性加热，以及通过液-固界面从液膜到固体壁的热传导。固壁表面采用四种面心立方晶格晶面。观察到由于界面处的热能和动量传递特性恶化而导致的界面处速度和温度的跳跃。结果表明，与液膜接触的固体壁面晶面类型对界面处的热能和动量传递特性有很大影响。通过分析固液界面的分子运动及其对能量传递的贡献，探讨了这种分子尺度结构影响界面能量传递的机理。
A molecular dynamics study has been performed on a liquid film sheared between moving solid walls. Thermal phenomena that occur in the Couette-like flow were examined, including energy conversion from macroscopic flow energy to thermal energy, i.e., viscous heating in the macroscopic sense, and heat conduction from the liquid film to the solid wall via liquid-solid interfaces. Four types of crystal planes of fcc lattice were assumed for the surface of the solid wall. The jumps in velocity and temperature at the interface resulting from deteriorated transfer characteristics of thermal energy and momentum at the interface were observed. It was found that the transfer characteristics of thermal energy and momentum at the interfaces are greatly influenced by the types of crystal plane of the solid wall surface which contacts the liquid film. The mechanism by which such a molecular scale structure influences the energy transfer at the interface was examined by analyzing the molecular motion and its contribution to energy transfer at the solid-liquid interface.