Molecular Dynamics Simulation of the Thermophysical Properties of Quantum Liquid Helium Using the Feynman-Hibbs Potential
This paper presents the detailed MD simulation on the properties including the thermal conductivities and viscosities of the quantum fluid helium at different state points. The molecular interactions are represented by the Lennard-Jones pair potentials supplemented by quantum corrections following the Feynman-Hibbs approach and the properties are calculated using the Green-Kubo equations. A comparison is made among the numerical results using LJ and QFH potentials and the existing database and shows that the LJ model is not quantitatively correct for the supercritical liquid helium, thereby the quantum effect must be taken into account when the quantum fluid helium is studied. The comparison of the thermal conductivity is also made as a function of temperatures and pressure and the results show quantum effect correction is an efficient tool to get the thermal conductivities.
Molecular Dynamics Quantum Corrections Feynman-Hibbs Potential Thermal Conductivity Viscosity
J.Liu W.Q.Lu
College of Physical Science, Graduate University of the Chinese Academy of Sciences, China
国际会议
西安
英文
901-905
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）