The problem of laminar cross-flow conjugated forced convection heat transfer from a horizontal cylinder with multiple equally spaced fins on its outer surface was investigated numerically. The effect of several combinations of number of fins, fin height, fin thickness and fin material on the total heat transfer from the cylinder is studied over the range of Reynolds numbers. The results showed the effectiveness of these combinations on the enhancement of the heat transfer from the cylinder-fin combination. The results show fin thickness to be a very important factor. A short thick fin can perform as well as a much longer but thinner fin, depending on the operating conditions. The effect of fin material is also significant. Some of the combinations studied resulted in a reduction in the heat transfer from the cylinder.

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