摘要
揭示了低温流体^3He的热导率在液态区随温度和压力两个状态参数变化的反常规律。综合该反常规律以及热导率在临界点附近的突变特性,首次提出了^3He在0.003 K至临界温度3.3157 K温区内完整的饱和线热导率方程以及压力高至20 MPa的压缩液相区热导率方程。方程计算值与实验数据相对偏差小于±1.5%,与高精度实验数据偏差小于±0.4%,并且在极低温条件下光滑过渡为由量子理论预测的理论极限.
The thermal conductivity behavior of liquid helium-3 is investigated upon temperature and pressure variation.Taking into account the singularity in the vicinity of the critical point,equations of thermal conductivity of ^3He（0.003～3.3157 K） on its saturation curve and in the compressed liquid region at pressures up to 20 MPa are proposed.The relative errors between the calculations and measurements are generally less than±1.5%,even±0.4%for high precision experimental data.At extremely low temperatures,the equations could smoothly switch to the theoretical limit predicted by the quantum theory.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第2期201-204,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金项目(No.50806047)
上海市浦江人才计划项目资助
关键词
氦-3
热导率
输运性质
helium-3 thermal conductivity transport property
