首页> 外文期刊>The Journal of Chemical Physics >Statistical mechanical theory for steady-state systems.III.Heat flow in a Lennard-Jones fluid
【24h】

Statistical mechanical theory for steady-state systems.III.Heat flow in a Lennard-Jones fluid

机译:稳态系统的统计力学理论III。Lennard-Jones流体中的热流

获取原文
获取原文并翻译 | 示例
           

摘要

A statistical mechanical theory for heat flow is developed based upon the second entropy for dynamical transitions between energy moment macrostates.The thermal conductivity,as obtained from a Green-Kubo integral of a time correlation function,is derived as an approximation from these more fundamental theories,and its short-time dependence is explored.A new expression for the thermal conductivity is derived and shown to converge to its asymptotic value faster than the traditional Green-Kubo expression.An ansatz for the steady-state probability distribution for heat flow down an imposed thermal gradient is tested with simulations of a Lennard-Jones fluid.It is found to be accurate in the high-density regime at not too short times,but not more generally.The probability distribution is implemented in Monte Carlo simulations,and a method for extracting the thermal conductivity is given.
机译:基于能量熵宏观状态之间动态跃迁的第二个熵,开发了一种热力学统计力学理论。从这些时间相关函数的格林库伯积分获得的热导率是这些基本理论的近似值,并探索其与时间的依赖关系。导出了一个新的导热系数表达式,并证明了其收敛速度比传统的Green-Kubo表达式更快。通过对Lennard-Jones流体的模拟测试了施加的热梯度。发现在高密度条件下,在不太短的时间内(但不是更普遍),它是准确的。在Monte Carlo模拟中实现了概率分布,以及一种方法给出了提取导热系数的方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号