An experimental investigation has been conducted to determine the effects of rotation, heat flux, eccentricity, radii ratio, and two cylinders gab on the convective heat transfer of air between horizontal concentric and eccentric rotating cylinders. An experimental apparatus is designed and constructed to achieve this investigation. The measured data are presented in form of Nusselt number, Rotation Reynolds number, Raylaigh number, eccentricity, aspect ratio, and radii ratio.
Heat transfer rates (Nusselt numbers) have been computed for Raylaigh number range of 3× 103 to 1.6× 105,Rotation Reynolds number range of 0 to 820 eccentricity range of 0 to 1.2, aspect ratio range of 29 to 71.5, radii range ratio of 1.9 to 4.5. The obtained Experimental results show that, the Nusselt number increases with increasing rotation Reynolds number. Accordingly, the convection heat transfer coefficient and in turn Nusslet number increased with increasing Raylaigh number. Comparison with the previous work shows good agreement.