Cover
Vol. 23 No. 1 (2023)

Published: July 31, 2023

Pages: 98-105

Original Article

An Experimental Study of Natural Convection Heat Transfer from a Horizontal and Slightly Inclined Plate-Fin Heat Sink

Almustafa A. Khalaf 1 Hussien S. Sultan 1 Falah A. Abood 1
1 Department of Mechanical Engineering, College Engineering, University of Basrah, Basrah, Iraq
History
  • Received: July 27, 2022
  • Revised: August 22, 2022
  • Accepted: August 31, 2022
  • Available Online: July 2, 2023
DOI

https://doi.org/10.33971/bjes.23.1.13

Abstract

The steady-state natural convection from heat sink fin arrays was studied on horizontal, vertical, and inclined heat sinks. Under natural convection, horizontal and vertical heat sinks with parallel fins were tested by considering radiation heat transfer. The experiments were conducted with power inputs ranging from 60 W to 455 W in order to obtain different temperatures. According to the result, when heat input increases, the heat transfer coefficient increases by 38 %, 40.78 % for horizontal and vertical respectively. For horizontal and vertical cases, new correlations have been presented to calculate the Nusselt number influenced by the Rayleigh number. For the incline case, the effect of buoyancy force was studied by changing the inclination angles at 0, 30, 45, and 60 degrees from vertical position. According to comparisons between vertical and incline cases, Nusselt number and heat transfer coefficient were most improved at 30 degrees by 6 %.

Keywords

References

  1. P. Singh, and A. K. Patil, “Experimental investigation of heat transfer enhancement through embossed fin heat sink under natural convection”, Experimental Thermal and Fluid Science, Vol. 61, pp. 24-33, 2015.
  2. W. Elenbaas, “Heat dissipation of parallel plates by free convection”, Physica, Vol. 9, Issue 1, pp. 1-28, 1942.
  3. K. E. Starner, and H. N. McManus Jr, “An experimental investigation of free-convection heat transfer from rectangular-fin arrays”, ASME Journal of Heat and Mass Transfer, Vol. 85, Issue 3, 1963.
  4. F. Harahap, and H. N. McManus Jr, “Natural convection heat transfer from horizontal rectangular fin arrays”, Vol. 89, Issue 1, pp. 32-38, 1967. https://doi.org/10.1115/1.3614318
  5. T. Aihara, “Natural convection heat transfer from vertical rectangular fin arrays: Part II, Heat Transfer from Fin Edges”, Bull, JSME, Vol. 13, Issue 64, pp. 1182-1191, 1970.
  6. C. D. Jones, and L. F. Smith, “Optimum arrangement of rectangular fins on horizontal surfaces for free-convection heat transfer”, ASME Journal of Heat and Mass Transfer, Vol. 92, Issue 1, 1970. https://doi.org/10.1115/1.3449648
  7. T. Fujii, and H. Imura, “Natural-convection heat transfer from a plate with arbitrary inclination”, International Journal of Heat and Mass Transfer, Vol. 15, Issue 4, pp. 755-767, 1972.
  8. G. Mittelman, A. Dayan, K. Dado-Turjeman, and A. Ullmann, “Laminar free convection underneath a downward facing inclined hot fin array”, International Journal of Heat and Mass Transfer, Vol. 50, Issue 13-14, pp. 2582-2589, 2007.
  9. R. T. Huang, W. J. Sheu, and C. C. Wang, “Orientation effect on natural convective performance of square pin fin heat sinks”, International Journal of Heat and Mass Transfer, Vol. 51, Issue 9-10, pp. 2368-2376, 2008.
  10. M. M. Naserian, M. Fahiminia, and H. R. Goshayeshi, “Experimental and numerical analysis of natural convection heat transfer coefficient of V-type fin configurations”, Journal of Mechanical Science and Technology, Vol. 27, Issue 7, pp. 2191-2197, 2013. https://doi.org/10.1007/s12206-013-0535-7
  11. M. A. Ismael, H. A. AL-Mayahi, and I. N. Jawad “Natural Convection Heat Transfer in Arc Shape Wall Porous Cavity Filled with Nano-Fluid”, Basrah Journal for Engineering Sciences, Vol. 14, Issue 2, pp. 137-148, 2014.
  12. J. B. Lee, H. J. Kim, and D. K. Kim, “Thermal optimization of horizontal tubes with tilted rectangular fins under free convection for the cooling of electronic devices”, Applied Sciences, Vol. 7, Issue 4, 2017.
  13. A. H. Altun, and O. Ziylan, “Experimental investigation of the effects of horizontally oriented vertical sinusoidal wavy fins on heat transfer performance in case of natural convection”, International Journal of Heat and Mass Transfer, Vol. 139, pp. 425-431, 2019.
  14. D. Hou, X. Xin, and J. Qian, “Analysis of natural convection heat transfer from vertical and inclined plate fin heat sinks”, Proceedings of the Seventh Asia International Symposium on Mechatronics, Lecture Notes in Electrical Engineering, Springer, Singapore, Vol. 589, 2020.
  15. A. M. Hadi, M. A. Ismael, and H. A. Alhattab, “Improvement of Heat Sink Performance Using Graphite and Graphene Issue 1, pp. 50-55, 2021. https://doi.org/10.33971/bjes.21.1.7
  16. J.P. Holman, Heat Transfer, 8th Edition, USA, McGraw-Hill Company, Inc., 696 pages, 1997.
  17. Y. A. Cengel, Heat Transfer: A Practical Approach, McGraw-Hill Companies, Second Edition, USA, 2008.
  18. A. Bar-Cohen, and M. Jelinek, “Optimum arrays of longitudinal, rectangular fins in corrective heat transfer”, Heat Transfer Engineering, Vol. 6, Issue 3, pp. 68-78, 1985.
  19. I. Tari, and M. Mehrtash, “Natural convection heat transfer from inclined plate-fin heat sinks”, International Journal of Heat and Mass Transfer, Vol. 56, Issue 1-2, pp. 574-593, 2013.