论文标题
液体，聚合物玻璃和无定形固体的无处不在的热导率公式
A Ubiquitous Thermal Conductivity Formula for Liquids, Polymer Glass, and Amorphous Solids
论文作者
论文摘要
长期以来，液体和无定形固体中热传输的微观机制一直是一个重大问题。有几种不同的方法来解释这些系统的热导率，例如，布里奇曼（Bridgman）的简单液体公式，无定形固体的最小导热率的概念以及无定形聚合物的热阻力网络模型。在这里，我们提出了一个无处不在的公式，以统一的方式解释液体和无定形固体的导热率。使用此公式无拟合参数的计算的导热率与这些系统的实验数据非常吻合。我们的公式不仅为这些系统中传热的微观机制提供了详细的含义，而且还解决了现有公式和实验数据之间的差异。
The microscopic mechanism of thermal transport in liquids and amorphous solids has been an outstanding problem for a long time. There have been several different approaches to explain the thermal conductivities for these systems, for example, the Bridgman's formula for simple liquids, the concept of the minimum thermal conductivity for amorphous solids, and the thermal resistance network model for amorphous polymers. Here, we present a ubiquitous formula to explain the thermal conductivities of liquids and amorphous solids in a unified way. The calculated thermal conductivities using this formula without fitting parameters are in excellent agreement with the experimental data for these systems. Our formula is not only providing detailed implications on microscopic mechanisms of heat transfer in these systems, but also solves the discrepancies between existing formulae and experimental data.
