Numerical Study of Forced Convection Heat Transfer Across an Elliptic Cylinder in Laminar and Unsteady Nanofluid Flow

Abstract

This paper investigates theoretically forced convection from an inclined elliptic cylinder placed in a nanofluid cross laminar flow with constant surface temperature. The nanofluid is created by suspending copper particles in water. The referred problem is studied through solving the conservation equations of mass, momentum, and energy using Fourier spectral method. There are some important parameters affect the heat transfer characteristics which can be presented as follows: Inclination angle which varies from 0 to 90 degrees, and copper nanoparticles volume fraction starts from 0 up to 0.05. these parameters are investigated under the conditions: Reynolds number is 50, elliptic axis ratio is fixed at 0.5, and constant surface temperature. The results are found to be in a good agreement with the previous studies in the same category, for different axes ratios and Prandtl number of 0.7. The conclusions of the present investigation show that when nanoparticles volume fraction increases, an obvious enhancement in heat transfer is produced. On the other hand, when changing the angle of inclination from 0 up to 90 the flow exhibits lower heat transfer rates, and all these results are indicated through calculating average Nusselt number.