Heat Transfer By Natural Convection from a Heated Square Inner Cylinder to Its Elliptical Outer Enclosure Utilizing Nanofluids

Abstract In this paper a numerical study of natural convection stationary laminar heat transfers in horizontal ring between heated square inner cylinder and cold elliptical outer is presented. A Cu-water nanofluid flows through annular space. Different values the Rayleigh number volume fraction nanoparticles are studied. The system equations governing problem was solved numerically by fluent calculation code based on finite method Boussinesq approximation. interior exterior surfaces kept at constant temperature. carried out for numbers ranging from 10 3 to 5 . We have studied effects different convection. results presented as isotherms, isocurrents, local mean Nusselt numbers. aim influence thermal transfer rate.