Abstract

Dushyant Singh Chandel, Dr. S. K. Nagpure

ABSTRACT

Heat transfer and fluid flow through natural convection in annulus are significant phenomenon in various engineering system due to having technological relevance in thermal storage system, nuclear reactor, nuclear reactor technology, cooling of electronic apparatus such as heat sink, heat exchanger, and numerous other practical applications. In the work, at steady state condition the natural convective heat transfer has been investigate between concentric annulus computation using finite volume tool ANSYS Fluent 14.5. The inner radial wall of Annulus has been subjected to elevated temperature and the outer radial wall is subjected to room temperature. The effect of buoyancy due to free convection has been seen under the influence of various parameters such as radius ratio, varying Rayleigh number, Prandlt number, Nusselt number. The equation of motion for free convection of concentric annulus has been solved by using SIMPLE algorithm where Bossious or incompressible boundary condition has been assigned the obtained result has been compared with various result and the results are within acceptable limit. It has been found that varying Rayleigh number and radius ration significantly affects the temperature profile and flow field. However, the Prandlt number has in-significant effect.