摘要
本文报告了50 nm氧化铜(体积百分比ф≤0.6%)与去离子水的悬浮液有效导热系数测量结果,讨论了温度依变性对导热系数的影响。运用适用于低浓度悬浮液的能量和质量方程进行分析表明,颗粒空间分布和温度场间相互影响,进而影响导热系数测量结果。考虑低浓度悬浮液中颗粒布朗扩散和热泳作用,讨论了运用准稳态方法测量纳米颗粒悬浮液导热系数的有效性,即需同时保证合适的加热热流密度和液体试样两侧的温差。
This paper reports on measurements of the effective thermal conductivities for deionized water at room temperature with inclusion of 50 nm CuO nanoparticles with concentration lower than 0.6% by volume.The enhancement of heat transfer by evaluating the temperature effect on thermal conductivity was discussed.The analysis with governed equations of heat and mass in nanoparticle suspension(nanofluid)indicates that the spatial distribution of nanoparticles and temperature may influence each other greatly,and t...
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第9期1567-1569,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No．59995550-3，No．50576023)
关键词
温度依变性
纳米颗粒悬浮液
导热系数
测量
temperature dependence
nanoparticle suspension
thermal conductivity
measurements
