Computational Analysis of Natural Convection in Spherical Annulus Using FEV
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2014, Vol 4, Issue 10
Abstract
HEAT transfer by natural convection from a body to its finite enclosure is of importance in nuclear reactor technology, electronic instrumentation packaging, aircraft cabin design, the analysis of fluid suspension gyrocompasses, and numerous other practical situations. The steady natural convection heat transfer of fluids between two concentric isothermal spheres is investigated computationally with the help of FEV in ANSYS 14.5. The inner wall is subjected to a higher temperature and outer is at room temperature. The steady behavior of the flow field and its subsequent effect on the temperature distribution for different Rayleigh numbers and radius ratios are analyzed. Bossious boundary condition is taken for natural convection and which is solved in fluent module. Steady solutions of the entire flow field is obtained for Rayleigh number (5x101<Ra<105), various Prandlt number and radius ratio (l.5<rr<3). The result shows that the Rayleigh number and radius ratio have a profound influence on the temperature and flow fields and Prandlt number has very negligible effect. The results of average Nusselt numbers are also compared with those of previous numerical investigations. Excellent agreement is obtained.
Authors and Affiliations
Md Shoaib Khan , Manish Bhaskar , Sankalp Verma
Keywords
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