A Ubiquitous Thermal Conductivity Formula for Liquids, Polymer Glass, and Amorphous Solids  

作　　者：Qing Xi Jinxin Zhong Jixiong He Xiangfan Xu Tsuneyoshi Nakayama Yuanyuan Wang Jun Liu Jun Zhou Baowen Li 席晴;钟金鑫;何集雄;徐象繁;Tsuneyoshi Nakayama;王元元;刘君;周俊;李保文(Center for Phononics and Thermal Energy Science,China-EU Joint Lab for Nanophononics,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;Department of Mechanical and Aerospace Engineering,North Carolina State University,Raleigh,NC 27695,USA;Hokkaido University,Sapporo,Hokkaido 060-0826,Japan;School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China;Paul M Rady Department of Mechanical Engineering,Department of Physics,University of Colorado,Boulder,CO 80305-0427,USA;School of Physics and Technology,Nanjing Normal University,Nanjing 210046,China)

机构地区：[1]Center for Phononics and Thermal Energy Science,China-EU Joint Lab for Nanophononics,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [2]Department of Mechanical and Aerospace Engineering,North Carolina State University,Raleigh,NC 27695,USA [3]Hokkaido University,Sapporo,Hokkaido 060-0826,Japan [4]School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China [5]Paul M Rady Department of Mechanical Engineering,Department of Physics,University of Colorado,Boulder,CO 80305-0427,USA [6]School of Physics and Technology,Nanjing Normal University,Nanjing 210046,China

出　　处：《Chinese Physics Letters》2020年第10期33-38,共6页中国物理快报（英文版）

基　　金：This work is supported by the National Key R&D Program of China(Grant No.2017YFB0406004);the National Natural Science Foundation of China(Grant No.11890703);JH and JL are supported by the National Science Foundation of USA(Award No.CBET-1943813);the Faculty Research and Professional Development Fund at North Carolina State University.

摘　　要：The microscopic mechanism of thermal transport in liquids and amorphous solids has been an outstanding problem for a long time.There have been several approaches to explain the thermal conductivities in these systems,for example,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 calculate the thermal conductivities of liquids and amorphous solids in a unified way,and compare it with previous ones.The calculated thermal conductivities using this formula without fitting parameters are in excellent agreement with the experimental data.Our formula not only provides a detailed microscopic mechanism of heat transfer in these systems,but also resolves the discrepancies between existing formulae and experimental data.

关 键 词：resistance AMORPHOUS SOLIDS 

分 类 号：O551.3[理学—热学与物质分子运动论]