| 高剪切率的Couette流下液氩流体热导率的分子动力学模拟 |
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| 引用本文： | 孙成珍,卢文强,刘捷,白博峰.高剪切率的Couette流下液氩流体热导率的分子动力学模拟[J].工程热物理学报,2011(7). |
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| 作者姓名： | 孙成珍 卢文强 刘捷 白博峰 |
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| 作者单位： | 中国科学院研究生院物理科学学院;西安交通大学动力工程多相流国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(No.50876111;No.50936006) |
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| 摘 要： | 基于平衡分子动力学(EMD)模拟方法,对Lees-Edwards周期性边界条件作一修正并成功地应用其形成具有高恒定剪切率的Couette流动,最后通过Green-Kubo公式计算得到了剪切流下液氩流体的热导率。计算结果,表明在剪切流下液氩流体的热导率仍然表现为各向同性,同时还发现流动方向的热导率不随流动剪切率的增加而发生变化,并且该值跟静态下液氩的热导率(λ=0.132 Wm~(-1)K~(-1))基本一致。
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| 关 键 词： | 平衡分子动力学(EMD) Lees-Edwards周期性边界条件 Couette流 热导率 |
Molecular Dynamics Simulation of Thermal Conductivity of Liquid Argon in High-Shear-Rate Couette Flow |
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| SUN Cheng-Zhen LU Wen-Qiang LIU Jie BAI Bo-Feng.Molecular Dynamics Simulation of Thermal Conductivity of Liquid Argon in High-Shear-Rate Couette Flow[J].Journal of Engineering Thermophysics,2011(7). |
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| Authors: | SUN Cheng-Zhen LU Wen-Qiang LIU Jie BAI Bo-Feng |
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| Institution: | SUN Cheng-Zhen~(1,2) LU Wen-Qiang~1 LIU Jie~1 BAI Bo-Feng~2 (1.College of Physical Sciences,Graduate University of Chinese Academy of Sciences,Beijing 100049,China,2.State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China) |
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| Abstract: | In this paper,Lees-Edwards periodic boundary condition is modified and successfully applied to form a stable high-shear-rate Couette flow.Thermal conductivity of liquid argon under shear flow is calculated with Green-Kubo formula by equilibrium molecular dynamics(EMD) simulation.The results show that the thermal conductivity is isotropic also in the presence of shear flow.In addition,the thermal conductivity in the flow direction does not vary with the shear rate and the constant value agrees well with the ... |
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| Keywords: | equilibrium molecular dynamics(EMD) Lees-Edwards periodic boundary condition Couette flow thermal conductivity |
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