纳米流体传质扩散系数的测定  

MEASUREMENTS OF MASS DIFFUSIVITY OF NANOFLUIDS

作　　者：方晓鹏[1] 宣益民[1] 李强[1] 

机构地区：[1]南京理工大学动力工程学院,江苏南京210094

出　　处：《工程热物理学报》2011年第2期277-280,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50436020)

摘　　要：本文建立光学实验测试系统,测量了不同温度条件下罗丹明B在不同粒子体积份额的纳米流体(Cu-乙二醇和Cu-水)中的质扩散系数。实验结果表明;罗丹明B在纳米流体中的扩散系数大于其在基液中的扩散系数,且扩散系数随着粒子体积份额的增大而增大;当粒子体积份额一定时,扩散系数随着温度的升高而增大。An optical experimental system for measuring the mass diffusivity of nanofluids is designed. The mass diffusivity of Rhodamine B in nanofluids （Cu-glyeol and Cu-water） with different particle volume fractions under different temperatures are measured. The experimental results show that the mass diffusivity of Rhodamine B in nanofluids is bigger than that in deionized water, the mass diffusivity diffusion increases with the increase of particle volume fraction. For different particle volume fractions, the mass diffusivity also increases with the increase of temperature.

关 键 词：纳米流体 传质扩散系数 RHODAMINE B 

分 类 号：V235[航空宇航科学与技术—航空宇航推进理论与工程]