Mixed Convection Opposing Flow in a Vertical Porous Annulus-Two Temperature Model

International Conference on Advances in Materials and Manufacturing Applications 2016

Al-Rashed, Abdullah A. Aa^3 ; Salman Ahmed, N.J.^1 ; Khaleed, H.M.T.^2 ; Khan, T M Yunus^2,4,5 ; NazimAhamed, K.S.^1

Center for Energy Sciences, Dept. of Mechanical Engineering, University of Malaya, Kuala Lumpur

50603, Malaysia^1

Dept of Mechanical Engineering, Faculty of Engineering, Islamic University, Madinah Munawwarra, Saudi Arabia^2

Dept. of Mechanical Engineering, University of Malaya, Kuala Lumpur

50603, Malaysia^3

Dept. of Mechanical Engineering, BVB College of Engineering and Technology, Hubli, India^4

Dept. of Civil Engineering, Rural Engineering College, Hulkoti

582205, India^5

关键词: Constant temperature;    Fluid-saturated porous medium;    Momentum equation;    Nonlinear partial differential equations;    Porous medium;    Radiation parameters;    Thermal non-equilibrium;    Two Temperature Model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/149/1/012214/pdf
DOI  :  10.1088/1757-899X/149/1/012214

来源: IOP

【 摘 要 】

The opposing flow in a porous medium refers to a condition when the forcing velocity flows in opposite direction to thermal buoyancy obstructing the buoyant force. The present research refers to the effect of opposing flow in a vertical porous annulus embedded with fluid saturated porous medium. The thermal non-equilibrium approach with Darcy modal is considered. The boundary conditions are such that the inner radius is heated with constant temperature Twthe outer radius is maintained at constant temperature Tc. The coupled nonlinear partial differential equations such as momentum equation, energy equation for fluid and energy equation for solid are solved using the finite element method. The opposing flow variation of average Nusselt number with respect to radius ratio Rr, Aspect ratioAr and Radiation parameter Rd for different values of Peclet number Pe are investigated. It is found that the flow behavior is quite different from that of aiding flow.