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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Relations between Transport Coefficients and Their Density and Temperature Dependence
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Relations between Transport Coefficients and Their Density and Temperature Dependence

机译：输运系数与其密度和温度相关性的关系

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摘要

Nonequilibrium statistical mechanics via density fluctuation theory predicts relations between the bulk and shear viscosity,thermal conductivity,and self-diffusion coefficient of a fluid.In this Feature Article,we discuss such relations holding for fluids over wide ranges of density and temperature experimentally studied in the laboratory.It is discussed how such relations can be used to successfully compute the density and temperature dependence on the basis of intermolecular interaction potential models with the help of the modified free volume theory and the generic van der Waals equation of state once the parameters in them are determined at a low density or at a subcritical temperature.Although some approximations have been made to derive them,they represent a reliable molecular theory of transport coefficients over the entire density and temperature ranges of fluids-namely,gases and liquids-a theory hitherto unavailable in the kinetic theory of liquids and dense gases.
机译：通过密度波动理论的非平衡统计力学可以预测流体的体积与剪切粘度，导热系数和自扩散系数之间的关系。在本专题文章中，我们将讨论在宽密度和温度范围内对流体进行实验研究的这种关系成立。讨论了如何利用这种关系在分子间相互作用势模型的基础上借助改进的自由体积理论和通用范德华状态方程（一旦参数输入）成功地计算密度和温度依赖性。它们是在低密度或亚临界温度下确定的。尽管已经得出了一些近似值，但它们代表了在流体的整个密度和温度范围内的传输系数的可靠分子理论，即气体和液体。迄今为止，在液体和浓气体的动力学理论中尚不可用。

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