USE OF BAFFLES FOR HEAT TRANSFER REDUCTION FROM A CYLINDER IN CROSS FLOW

Abstract

The problem of cross-flow forced heat transfer from a horizontal cylinder with multiple equally spaced low conductivity baffles on its outer surface was investigated numerically. The effect of several combinations of baffles and baffle heights on the average Nusselt number was studied over a wide range of Reynolds numbers. The results showed that there was an optimal number of baffles for a minimum Nusselt number for a given value of baffle height and Reynolds number. Short baffles slightly increased the Nusselt number at small Reynolds number values.