论文标题
经典流体的剪切粘度和热导率系数的最小
Minima of shear viscosity and thermal conductivity coefficients of classical fluids
论文作者
论文摘要
各种液体的剪切粘度和热导率系数沿相图上的某些轨迹表现出最小值。这些最小值是由于类似气体和液体状态的动量和能量传输机制之间的交叉造成的。我们证明，在适当降低的单位中，最小值的幅度是准宇宙，尤其是对于粘度系数。为了支持这一观察，提出的结果涉及具有不同成对相互作用势（硬球，Lennard-Jones和Coulomb）的三个简单模型系统的运输特性以及七个重要的真实原子和分子液体（NE，AR，AR，AR，KR，KR，KR，XE，CH $ _4 $，CO $ _2 $，以及N $ _2 $）。粘度和热导率的最小值代表流体传输特性的有用参考点。
The shear viscosity and thermal conductivity coefficients of various liquids exhibit minima along certain trajectories on the phase diagram. These minima arise due to the crossover between the momentum and energy transport mechanisms in gas-like and liquid-like regimes. We demonstrate that the magnitudes of the minima are quasi-universal in appropriately reduced units, especially for the viscosity coefficients. Results presented in support of this observation concern the transport properties of three simple model systems with different pairwise interaction potentials (hard spheres, Lennard-Jones, and Coulomb) as well as seven important real atomic and molecular liquids (Ne, Ar, Kr, Xe, CH$_4$, CO$_2$, and N$_2$). The minima in viscosity and thermal conductivity represent useful reference points for fluid transport properties.
