用于材料导热系数瞬态测量的数学模型  

Mathematical Models of the Dynamic Measurement for Thermal Conductivity of Material

作　　者：盛健[1] 崔志尚[1] 

机构地区：[1]中国计量学院,杭州310034

出　　处：《计量学报》2002年第1期30-32,共3页Acta Metrologica Sinica

摘　　要：本文介绍了用于材料导热系数瞬态测量的两种数学模型。它们考虑到在实验过程中材料膨胀的影响。两个微分方程均适用于由大脉冲电流直接加热的细长型管状样品的瞬态实验。在第二个方程中 ,时空变量完全保持独立。它对于进行计算机模拟特别有效。Two mathematical models of the dynamic measurement for thermal conductivity of materials are described by taking into account the effect of thermal expansion during the experiment. Both equations are suitable to the dynamic experiment occurring in a long thin type of tubular specimen directly heated by a large pulse current. The variables space and time are completely separated in the second equation. It is particularly useful for computer simulations.

关 键 词：热传导率 动态测量 温度分布 质量流 数学模型 材料 导热系数 瞬态测量 

分 类 号：TB941[一般工业技术—计量学]