液体结构与热导率模型  

Structure of Liquids and a Liquid Thermal Conductivity Model

作　　者：雷群芳[1] 侯虞钧[2] 

机构地区：[1]浙江大学化学系 [2]浙江大学化工系,浙江杭州310027

出　　处：《高校化学工程学报》2001年第6期516-520,共5页Journal of Chemical Engineering of Chinese Universities

摘　　要：为了深入探讨液体结构对热导率的影响,假设液体由微型晶粒和空穴组成,在有效结构理论基础上用晶体学和气体分子运动论的方法推导出一个双参数热导率模型:g3/2Cs7/2s2s7/4/)(ΩVMTVVVCVVVVTDλ-+-=,该模型能够较好地适用于不同液体物质热导率的关联。由关联数据定性讨论了特征参数D和C的物理意义,解释了特征参数D和物质晶胞参数间的良好定量关系。结果表明模型参数的数值和符号较好地表达了液体的结构特点和导热机理,进一步说明了该热导率模型的合理性。In order to investigate the influence of liquid structure on the thermal conductivity, a two-parameter liquid thermal conductivity model, gΩVMTVVVCVVVVTD3/2Cs7/2s2s7/4/)(-+-=l, was presented from the view of crystallography and kinetic theory of gases, on the supposition that liquid is composed of a mixture of microcrystallites and vacancies and on the basis of significant structure theory. The model can be applied to the correlation of the thermal conductivity of many different liquids with satisfactory results. The physical significance of two characteristic parameters, D and C, is qualitatively discussed. A good relationship between the parameter D and the crystal cell parameters is quantitatively explained. It follows that the values of two characteristic parameters are in reasonable agreement with the hypothesis for the structure and the characterization of liquids. The result further illustrate the validity of the liquid thermal conductivity model.

关 键 词：热导率 模型 液体结构 晶胞参数 热传导 导热机理 分子运动论 

分 类 号：O511.3[一般工业技术—材料科学与工程] O552.4[理学—低温物理]