NUMERICAL STUDY OF HEATING TRANSFER BY NATURAL CONVECTION IN AN INCLINED ELLIPTICAL CYLINDER CHARGED WITH NANOFLUID.

In this paper, thermal transfer with natural convection in a tilted annular cylinder with a Cu-water nanofluid has been numerically studied. The hot interior and cold exterior elliptical surfaces of the enclosure were maintained at constant temperatures h T and c T, respectively. The governing equations were solved by the stream functionvorticity approach. The finite volume approach was utilized to discretise the controlling equations. The volume fraction range of the nanoparticles and the Rayleigh number was as follows: 0 < φ < 0.08 and 10⁴ < Ra <10⁶, respectively. The inclination angles were γ = 30°, 45° and 60°. Results were given as isotherm contours, streamlines, average and local Nusselt numbers. The results indicate that the thermal transfer ratio increases with an increase in the tilt angle, regardless of the nanoparticle size values. and the impact of the inclination angle on the heating transfer rate is more important the higher the Rayleigh number and the more convection there is. [ABSTRACT FROM AUTHOR]