摘要
采用有限容积法对离散热源在水平腔体内引起的自然对流问题进行了数值模拟,通过改变离散热源的间距W和Ra数的大小,分析了不同工况对矩形腔内空气流速、温度分布和热源表面Nu的影响,并对顶部冷却和侧壁冷却两种不同边界条件的计算结果进行了比较.结果表明:W、Ra和边界条件的改变对矩形腔内自然对流换热有显著的影响.
A numerical study of natural convection,induced by multiple discrete heat sources in horizontal enclosure using a finite volume method,is presented.By varying the separation distance(W)and Rayleighnumber on the velocity fields,the effects of different operating conditions on the internal air flow,temperature distribution and the average Nusselt number,are analyzed.The computed values of enclosed rectangle cavity cooled from the top and lateral walls are compared.The results show that the structure of natural convection changes significantly with different W,Raand boundary conditions.
出处
《浙江树人大学学报（自然科学版）》
2013年第3期18-22,共5页
Journal of Zhejiang Shuren University(Acta Scientiarum Naturalium)
关键词
离散热源
封闭矩形腔
自然对流
数值研究
Discrete heat source
enclosed rectangle cavity
natural convection
numerical study
