Abstract
Natural convection heat transfer around a horizontal circular cylinder near an isothermal vertical wall
Highlights
Natural convection heat transfer is an inexpensive, reliable and noise-free method of heat transfer
The range of heat flux was varied from 159 W/m2 to 796 W/m2
Comparing Eq with the Eq for this study shown in the Fig. 10-11, is proven that the distance between the wall and the cylinder has an effect on the heat transfer results
Summary
Natural convection heat transfer is an inexpensive, reliable and noise-free method of heat transfer. Horizontal cylinder has many engineering applications such as radiators, heat exchangers, thermal storage systems, and cooling of electronic components. Past decade has witnessed extensive work on convective heat transfer from cylindrical surface. Morgan [1], Churchill and Chu [2] have determined empirical correlation equations which focus mainly on Nusselt number. Kuehn and Goldstein [3] investigated natural convection around an isothermal circular cylinder for Rayleigh numbers of < 107 and have solved the full Navier –Stokes and energy equations. Kuehn and Goldstien have shown that the heat transfer is at its maximum at the bottom of the cylinder and decreases toward the top of the cylinder. The decrease in heat transfer is attributed to an increase of the thermal boundary layer thickness
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