Author(s)

R. Smyth & P. Zurita

Abstract

Heat transfer at the outer surface of a rotating cylinder in the presence of axial flows R. Smyth & P. Zurita Department of Mechanical and Process Engineering, University of Sheffield, f . 0. Boz #00, Moppm 6% reef, ABSTRACT A numerical analysis has been made of forced convection heat transfer for axial flow of air along the outer surface of a rotating cylinder. The analysis was two dimensional with an allowance for a swirling component of velocity around the cylinder. The results show that an exponential law correlates the numerical data well with an exponent of 0.8, such as is obtained for turbulent flow past a flat plate. The results were compared with that available for cross flow of air but it is shown that for axial flow, rotation never becomes dominant enough to make the Nusselt number independent of the blowing Reynolds number. INTRODUCTION The heat transfer at the outer surface of a rotating cylinder, both in a still environment or in cross flow, has been

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