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Energies 2018, 11(4), 836; https://doi.org/10.3390/en11040836

Experimental Study on Horizontal Cylinders with Triangular Fins under Natural Convection

Department of Mechanical Engineering, Ajou University, Suwon 443-749, Korea
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Received: 6 March 2018 / Revised: 26 March 2018 / Accepted: 28 March 2018 / Published: 4 April 2018
(This article belongs to the Special Issue Thermal Energy Storage and Thermal Management (TESM2017))
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Abstract

In this study, thermal resistances of horizontal cylinders with triangular fins were measured in regard to fin numbers, fins heights, and temperature differences. Thereafter, an empirical correlation was proposed and validated for predicting the Nusselt numbers under the following conditions: Rayleigh number, 200,000–1,000,000; fin aspect ratio, 1.6–5.0; and fin number, 9–72. Finally, with the proposed correlation, the effects of fin numbers, fins heights, and fin thicknesses on the thermal resistances of the horizontal cylinders with triangular fins were investigated. It was shown that the thermal resistance generally increases as the fin number, fin height, and fin thickness increase. It is expected that horizontal cylinders for various cooling devices with triangular fins can be designed based on the findings of the present study. View Full-Text
Keywords: finned cylinders; natural convection; Nusselt number finned cylinders; natural convection; Nusselt number
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Lee, G.-W.; Kim, H.J.; Kim, D.-K. Experimental Study on Horizontal Cylinders with Triangular Fins under Natural Convection. Energies 2018, 11, 836.

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