Numerical simulation of double-diffusion natural convection in rectangular square cavity with porous enclosure

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Wang, Hanqing^1^2^3 ; Zhao, Yue^1^2^3 ; Tian, Ling^1^2^3

College of Civil Engineering University of South China, Hengyang Hunan

421001, China^1

Engineering Lab of Hunan for Building Environment Control, Hengyang Hunan

421001, China^2

Key Lab of Hengyang for the Building Energy Efficiency and Environmental Control, Hengyang Hunan

421001, China^3

关键词: Buoyancy ratio;    Double diffusion;    Flow charac-teristics;    Heat and mass transfer;    Porous enclosure;    Porous structures;    Rayleigh number;    Rectangular cavity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/5/052006/pdf
DOI  :  10.1088/1755-1315/267/5/052006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The double-diffusion mixed convection in a rectangular cavity with a porous structure was studied using numerical simulation. The influence of the Rayleigh number Ra, the porosity of the porous structure, the buoyancy ratio N and the distance of the porous structure from the left wall surface Xp on the flow characteristics were discussed by streamline, heatline, massline, Nu and Sh. It is found that the low floating-to-lift ratio has little effect on the heat transfer. When the buoyancy ratio is 5, the Nu number is linearly positively correlated with the porosity. When N