华东理工大学学报：自然科学版2012，Vol.38Issue(3)：391-396,6.
矩形腔内冷水稳态自然对流换热的二维数值模拟
Two-Dimensional Numerical Simulation for Natural Steady Convection of Cold Water in Rectangular Cavity
胡宇鹏 1李友荣 1袁晓凤1
作者信息
- 1. 重庆大学动力工程学院,低品位能源利用技术及系统教育部重点实验室,重庆400044
- 折叠
摘要
Abstract
In order to investigate the special phenomena and laws of natural convection for the non- Boussinesq fluid in rectangular cavities, a series of steady two-dimensional numerical simulations on natural convection of cold water in a rectangular cavity were conducted by using finite volume method. The flow and temperature fields for different aspect ratios of the cavity and Rayleigh numbers were obtained. The mean Nusselt numbers for different conditions were also compared and analyzed. The results show that the flow is enhanced and the number of cells increases with the increase of the aspect ratio of the cavity. The mean Nusselt number increases accordingly and finally approaches a constant value. With the increasing of the Rayleigh number, the heat transfer is enhanced and the transition of the flow structure will occur under smaller aspect ratio. Based on the simulation results, the heat transfer correlation were proposed according to the multiple linear regression.关键词
自然对流/矩形腔/数值模拟/传热特性Key words
natural convection/rectangular cavity/numerical simulation/heat transfer分类
能源与动力引用本文复制引用
胡宇鹏,李友荣,袁晓凤..矩形腔内冷水稳态自然对流换热的二维数值模拟[J].华东理工大学学报：自然科学版,2012,38(3):391-396,6.
