摘要
利用计算流体动力学CFD技术,对内置发热圆的方腔内双扩散混合对流情况进行了数值模拟.发热圆位于方腔中心,其表面高温高浓度,方腔各壁面绝热,低温低浓度流体从方腔左侧底部流进,从右侧顶部流出.分析了理查德数Ri,路易斯数Le及浮升力比Br对方腔内双扩散混合对流的影响,给出了流线、等浓度线以及等温线的分布情况,得出平均努赛尔数Nuav和平均舍伍德数Shav随着Ri,Le及Br的变化规律.
The numerical solution of the double diffusive mixed convection phenomena around a heated cylinder in an enclosure was presented. The heated cylinder is located at the center of the enclosure with high temperature and concentration. The inlet flow with low temperature and concentration is located on the lower-left wall of the enclosure,and the exit is on the upper-right wall. Other walls are assumed to he adiabatic. The influences of Lewis number Le,buoyancy ratio Br and Richardson number Ri on the double diffusive mixed convection were investigated. Streamlines,isotherms, isoconcentrations,as well as the local and average Nusselt number and Sherwood number under different parameters were reported to characterize the mixed convection in an enclosure.
出处
《上海理工大学学报》
CAS
北大核心
2014年第2期170-176,共7页
Journal of University of Shanghai For Science and Technology
基金
国家自然科学基金资助项目(51076105
51276117)
上海市自然科学基金资助项目(12ZR1420900)
关键词
数值模拟
双扩散混合对流
发热圆
方腔
numerical simulation
double diffusive mixed convection
heated cylinder
enclosure
