Adil Abbas MOHAMMED, Saad Abdulwahab RAZUQI

Effect of air fan position on heat transfer performance of elliptical pin fin heat sink subjected to impinging air flow

Heat rejection from electronic components by heat sink is still a viable cooling solution. The optimal heat sink design enables higher heat transfer performance. The purpose of the present study is to predict the effectiveness of heat sink elliptical closely spaced fins subjected to impinging air cooling. The air fan is the main source of impinging air, then its position and direction with the heat sink take the main role in present work. Two positions of fan location are studied. The first position where the fan is outside the heat sink and the second case where the fan is existed in a cut out template. So there are one impinging air inlet with four transverse outlets and one axial exit opposite to the air flow inlet. Reynolds number were taken at a range 3400-16000, the flow was turbulent so k-ϵ model turbulence model was used as our choice to simulate mean flow characteristics for turbulent flow conditions. The heat sink base was subjected to constant heat flux condition and proposed with range between 10000–40000 kW/m2 to keep the base temperature at a temperature around 100 oC. The Results of temperature contour lines depicted a variation from the base to the extended surfaces tips. The comparison between the two cases results showed high temperature difference in the case with the cut out template. Nusselts numbers indicated that the second case performed better in heat transfer than the first case. The experimental and numerical results showed a good agreement with a difference not exceeding 2%.

Keywords:

Forced convection, Heat transfer, Heat sink, Elliptical fins Heat flux, Numerical analysis,

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[1] Belarbi AA, Beriache M, Bettahar A. Experimental study of aero-thermal heat sink performances subjected to impinging air flow. International Journal of Heat and Technology 2018;36:1310–7. [CrossRef]
[2] Umair SM, Gulhane NP. On numerical investigation of heat transfer augmentation through pin fin heat sink by laterally impinging air jet. Procedia Engineering 2016;157:89–-97. [CrossRef]
[3] More1 AJ, Kore SS, Bhone NP, Gadadhe SS, Rathod PS. Experimental investigation of multi jet air impingement on circular pin fin heat sink for electronic cooling. Int J Res Appl Sci Eng Technol 2018;6:4908–15. [CrossRef]
[4] Lin DTW, Li H-Y, Hu Y-C. Study on the heat transfer of the plate-fin heat sink under impinging jet cooling. Prog Comput Fluid Dyn 2011;11:237–45. [CrossRef]
[5] Gururatana S. Heat Transfer Augmentation for Electronic Cooling. Am J Appl Sci 2012;9:436–9. [CrossRef]
[6] Deshmukh PA, Warkhedkar RM. Thermal performance of elliptical pin fin heat sink under combined natural and forced convection. Exp Therm Fluid Sci 2013;50:61–8. [CrossRef]
[7] Abdul Raheem Junaidi RR, Sadaq SI,. Ansari MM. Thermal analysis of splayed pin fin heat sink. Int J Mod Commun Technol Res 2014;2:48–53. [CrossRef]
[8] Kumar V, Bartaria DVN. CFD analysis of an elliptical pin fin heat sink using ansys fluent v12.1. Int J Mod Eng Res 2013;3:1115–22. [CrossRef]
[9] Sampath SS, Shetty S, Pon Selvan MC. estimation of heat dissipation from plate with multiple tapered and rectangular fins. Eur J Adv Eng Technol 2015;2:123–8. [CrossRef]
[10] Deo RC, Mi J, Nathan GJ. The influence of nozzle aspect ratio on plane jets. Experimental Thermal and Fluid Science 2007;31:825–38. [CrossRef]
[11] More AJ, Kondhalkar GE. Experimental investigation on pin fin heat sink using multi jet impingement. Int J Earth Sci Eng 2012;6:4908–15. [CrossRef]
[12] Beriache M, Naji H, Bettahar A, Mokhtar L. Computation of thermal and hydraulic performances of minichannel heat sink with an impinging air jet for computer cooling. Acta Polytechnica Hungarica 2012;9:139–53. [CrossRef]
[13] Kumar DV, Sk F, Krishna V. Effect of velocity ratio of impinging turbulent jets on heat transfer characterstics of heat sink. International Journal of Mechanical Engineering and Technology 2018;9:1093–101. [CrossRef]
[14] Chougule NK, Parishwad GV, Nadgire AR. Numerical investigation of multijet air impingement on pin fin heat sink with effusion slots. Proceedings of the World Congress on Engineering and Computer Science. WCECS 2013, 23–25 October, 2013, San Francisco, USA II,2013. pp. 23–5. [CrossRef]
[15] Li H, Chao S, Tsai G. Thermal performance measurement of heat sinks with confined impinging jet by infrared thermography. 16th International Symposium On Transport Phenomena. ISTP-16, 2005, Prague, 2005. pp. 1–9. [CrossRef]
[16] Umair SM, Gulhane NP, Al-robaian ARA, Khan SA. On numerical investigation of semi-empirical relations representing local nusselt number at lower nozzle-target spacing’s. International Journal of Engineering IJE Transactions A: Basics 2019;32:137–45. [CrossRef]
[17] Sheikh NN, Saini NK. A review paper on pin fin efficiency enhancement a review paper on pin fin efficiency enhancement. International Journal of Applied Engineering Research 2019;14:9. [CrossRef]
[18] Mohammed AA, Razuqi SA. Forced convection heat transfer of axial air flow with heatsink on uniform heat flux. Heat Eng Sustain Dev 2018;22:10–21. [CrossRef]
[19] Chu W-X, Chiou P-H, Wang C-C. Experimental and numerical study upon uniformity of impingement cooling with pin-fin heat sink. IEEE Trans Components Packag Manuf Technol 2019;10:88–98. [CrossRef]
[20] Tuckerman DB, Pease RFW. High-performance heat sinking for VLSI. IEEE Electron Device Lett 1981;2.126–9. [CrossRef]
[21] Garimella SV, Schroeder VP. Local heat transfer distributions in confined multiple air jet impingement in confined multiple air jet impingement. J Electron Packag 2001;123:165–72. [CrossRef]
[22] Jaffal HM, Jebur HS, Hussein AA. Numerical and experimental investigations on the performance characteristics for different shapes pin fin heat sink4. International Journal of Computation and Applied Sciences 2018;4:330–43. [CrossRef]
[23] Zhou D, Rau T. Thermal design methodology and prediction of heat sink performance. Journal of Thermal Engineering 2016;2:826–36. [CrossRef]

Başlangıç: 2015
Yayıncı: YILDIZ TEKNİK ÜNİVERSİTESİ

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