Natural convection from a vertical plate enclosed in a horizontal cylinder

Journal Article

• Magazine \ Newspaper: Int. Journal of Heat and Technology
• Volume Number: 23
• Pages: 155-161

Publication Abstract

Natural convection from a vertical plate enclosed in a horizontal cylinder was investigated numerically using finite element technique together with SIMPLER algorithm. Enclosure geometric configurations of L/Do = 0.25, 0.5 and 0.75, and Do = 0.1, 0.2 and 0.3 m were investigated. Laminar conditions up to Rayleigh number RaL of 3×107 were investigated. Flow fields represented by stream lines, velocity vectors and isothermal lines were presented for various conditions. The data of heat transfer, represented by Nusselt number NuL and effective thermal conductivity ratio ke/k were presented versus Rayleigh number RaL. The data of effective thermal conductivity ratio ke/k were presented versus a new modified Rayleigh number Ram. Three regimes of heat transfer were observed; conduction dominated, transition and convection dominated regimes. The data of heat transfer, represented by Nusselt number NuL and effective thermal conductivity ratio ke/k in the convection dominated regime were correlated. The proposed correlations represent accurately the current numerical data.