Numerical Study of Turbulent Mixed Convection Heat Transfer in a Semi-Circle Cavity Contains a Rotating Cylinder

Abstract

The investigation of mixed convection inside the semi- circle cavity with a fixed cylinder and rotating has been performed numerically. The bottom wall was maintained to constant heat flux while the curved wall was subjected to ambient and an adiabatic rotating cylinder presence in center cavity . The computation fluid dynamics (CFD)modeling includes numerical solutions of the conservation equation for mass ,momentum and energy, numerical prediction by using ansys FLUENT version 15. The finite volume method were used for solving governing differential equations and the turbulence model was applied SST(K-ω) . The results were represented of streamlines, isotherm counters and distribution local Nusselt number at Rayleigh number 2.9×10⁸ identical to heat flux q= 290w/m² and angular velocity of cylinder ω=0 ,62.8,83.73 and 89.5rad/s clockwise and inclination angle of cavity 0°,30°and 90°.The result shows that the effect of both rotating cylinder ,inclination angle led to enhancement heat transfer.

Keywords: Mixed convection, turbulence model , inclination angle , semicircle cavity.

DOI: 10.7176/JNSR/9-18-02

Publication date:September 30^th 2019