A transient free convection study with temperature-dependent viscosity in a square cavity with a local heat source

International Conference on Mechanical Engineering, Automation and Control Systems 2015

机械制造;无线电电子学;计算机科学

Astanina, M.S.^1 ; Sheremet, M.A.^1

Tomsk State University, 36, Lenina ave., Tomsk

634050, Russia^1

关键词: Differentially heated square enclosures;    Fluid flow and heat transfers;    Local heat source;    Second-order accuracy;    Temperature dependent viscosity;    Transient free convection;    Unsteady natural convection;    Variable viscosity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/124/1/012039/pdf
DOI  :  10.1088/1757-899X/124/1/012039

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Unsteady natural convection inside of a differentially-heated square enclosure filled with a fluid of temperature-dependent viscosity has been numerically studied. A mathematical model formulated in the dimensionless stream function and vorticity has been solved by a finite difference method of the second order accuracy. The effect of dimensionless time and Prandtl number on streamlines and isotherms has been investigated for Ra = 105. The results clearly demonstrate an evolution of fluid flow and heat transfer in the case of variable viscosity fluid.