Experimental and numerical study of natural convection from outer surface of a vertical cylinder with longitudinal fins

In this study, natural convection from the exterior of a longitudinally finned vertical cylinder into the surrounding air was studied. For this purpose, an experimental model was designed and constructed and the necessary measurements were performed on this model. This model was also numerically simulated and in this case many different cases of fin length and fin number were studied and compared. It was tried to find the best thermal and economical case. Based on the results, heat transfer increases almost linearly with the number of fins and their lengths, but the most thermo-economically appropriate case was found to be the case of 8 fins with 10cm lengths. In this case, heat transfer would be about 2.5 times of the no-fin case at a small expense. For the purpose of verification, the numerical results were compared with the experimental results of this work and another work.