摘要
根据实验所得沸腾曲线,对纳米颗粒悬浮液进行稳态数值模拟,计算了不同过热度下活化核心的密度。计算结果表明:对于不同浓度的纳米颗粒悬浮液,在考虑了其物性变化对沸腾传热的影响外,颗粒的加入对活化核心密度产生的影响是主要的因素,并且影响效果随颗粒浓度的变化不呈单向趋势。
A steady numerical simulation of the effect of nano-particles on nucleation sites in nucleate pool boiling heat transfer was conducted based on the experimental boiling curves. The bubble nucleation densities at a boiling copper surface for different superheat degrees were calculated. The results indicate that the effect of changing the number of nucleation site is a key factor which influences the boiling heat transfer enhancement for nano-particle suspension and this effect varies with particle concentration erratically.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第12期2101-2103,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50436020)
关键词
纳米颗粒
沸腾换热
活化核心
nano-particle
boiling heat transfer
nucleation site