对由固体球状颗粒和经历了相变的充填物所组成的多相充填床建立了数学模型，对充填物的熔化和凝固过程进行了数值计算，并在此基础上计算了由不同相所组成的区域内的有效导热系数．运用特殊的数学方法处理相变过程中潜热的释放或吸收，分析了导热参数的变化对有效导热系数的影响．得出有效导热系数的计算结果：对于玻璃球冰充填床，为１５６Ｗ／（ｍ·Ｋ），和实验结果的相对误差为２５％；对玻璃球水充填床，为０７８Ｗ／（ｍ·Ｋ），和实验结果的相对误差为３８％．这表明：用数值计算的方法研究多相物质的有效导热系数是一种行之有效的手段 A mathematic model was established for the multiphase packed bed composed of solid spherical particles and the filling which underwent phase change. The melting and solidification process of the filling material were numerically calculated. Based on this, Of the area of ​​the effective thermal conductivity. Using special mathematical methods to deal with the release or absorption of latent heat in the process of phase transition, the influence of the change of thermal conductivity on the effective thermal conductivity is analyzed. The calculation results of the effective thermal conductivity show that the relative error of the experimental results is 156 W / (m · K) for the glass ball-ice packed bed, and 2  5% for the glass ballwater packed bed, which is 0  78W / (m · K), and the experimental results of the relative error of 3  8%. This shows that it is an effective method to study the effective thermal conductivity of multiphase materials by numerical calculation