PERFORMANCE OF RECTANGULAR PIN-FIN HEAT SINK SUBJECT TO AN IMPINGING AIR FLOW

Year 2021, , 666 - 676, 01.03.2021

Adil Abbas Mohammed Saad Abdulwahab Razuqi

https://doi.org/10.18186/thermal.889174

Cited By: 4

Abstract

The heat sink is used to enhance heat rejection from heated surface to air. The seize and the geometry of
the heat sink with the shape of the extended surfaces have a great influence on the heat transfer coefficient. The
first step to get the optimal design is to predict the heat transfer by conduction in solid walls of heat sink and then
by convection between the solid and air flow. The purpose of the present study is to predict the effectiveness of
closely spaced parallel rectangular fin array arrangement. The electronic processor was represented by the copper
heat sink base with thermal conductivity of 401 W/m.K. The 72 fins with the geometry above mentioned were
exposed to heat transfer with conduction and convection along all the boundaries except the bottom from which
heat flow toward air flow domain. Mesh generation at a specific cells, number of element and number of nodes
were taken under temperature difference validation. The experiments were done under impinging air flow rate
with Reynolds number ranged between 4000-16000. The flow was turbulent so the k-Ԑ turbulence model needed
to simulate mean flow characteristics. Constant heat fluxes boundary conditions were proposed with range between
10000-70000 kW/m2. The Results of temperature contour lines depicted a heat trend from the hot base through the
extended surfaces to the fin tips. The fins were aligned in the core of heat sink showed higher temperature gradient
compared with the fins existed in lines surrounded the core. The thermal resistance decreased as the Reynolds
number increased and the Nusselt number increased as the Reynolds number increased and also when the heat flux
increased. The Reynolds number depicted increasing as the Nusselt number increased and so the heat rejected
from the heat sink base increased. There is a good agreement between the experimental and simulating results at
error percentage not exceed 2%.

Keywords

Forced Convection, Heat Transfer, Heat Sink, Rectangular Fins, Heat Flux, Numerical Analysis

References

• [1] Duan Z, Muzychka YS. Experimental investigation of heat transfer in impingement air cooled plate fin heat sinks. J. Electron. Packag, vol. 128, no. 4, pp. 412–418, 2006. doi: 10.1115/1.2351906.
• [2] Duan Z, Mzychka YS. Impingement air cooled plate fin heat sinks. Part II-Thermal resistance model. InThe Ninth Intersociety Conference on Thermal and Thermomechanical Phenomena In Electronic Systems (IEEE Cat. No. 04CH37543) 2004 Jun 1 (Vol. 1, pp. 436-443). IEEE. doi: 10.1109/ITHERM.2004.1319207.
• [3] Kim DK, Kim SJ, Bae JK. Comparison of thermal performances of plate-fin and pin-fin heat sinks subject to an impinging flow. International Journal of Heat and Mass Transfer. 2009 Jul 1;52(15-16):3510-7. doi:10.1016/j.ijheatmasstransfer.2009.02.041.
• [4] D. BK, Khan NA. Experimental and CFD Analysis of Aluminum Heat Sinks for Avionics Applications. IJIRST-International J. Innov. Res. Sci. Technol., vol. 3, 2016.
• [5] Huang CH, Lu JJ, Ay H. A three-dimensional heat sink module design problem with experimental verification. Int. J. Innov. Res. Sci. Technol., vol. 3, no. 2, p. 2349, 2016. doi:10.1016/j.ijheatmasstransfer.2010.11.044.
• [6] Tien HC, Huang WD. Simulation and assessment of air impingement cooling on squared pin-fin heat sinks applied in personal computers. Journal of Marine Science and Technology. 2005 Mar 1;13(1):20-7.
• [7] Li HY, Chiang MH, Chen KY. Performance analysis of pin-fin heat sinks with confined impingement cooling. IEEE transactions on components and packaging technologies. 2007 Aug 27;30(3):383-9. doi: 10.1109/TCAPT.2007.900052.
• [8] Rosli R, Annuar KM, Ismail FS. Optimal pin fin heat sink arrangement for solving thermal distribution problem. J. Adv. Res. Fluid Mech. Therm. Sci. 2015;11:1-8.
• [9] El-Jummah AM, Andrews GE, Staggs JE. Impingement Jet Cooling with Ribs and Pin Fin Obstacles in Co-flow Configurations: Conjugate Heat Transfer Computational Fluid Dynamic Predictions. InASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition 2016. American Society of Mechanical Engineers Digital Collection. pp. 13–17. doi.org/10.1115/GT2016-57021.
• [10] Umair SM, Gulhane NP. On numerical investigation of heat transfer augmentation through pin fin heat sink by laterally impinging air jet. Procedia Engineering. 2016 Jan 1;157:89-97.
• [11] Ravikumar S, Chandra PS, Harish R, Sivaji T. Experimental and Transient Thermal Analysis of Heat Sink Fin for CPU processor for better performance. InIOP Conference Series: Materials Science and Engineering 2017 May 1 (Vol. 197, No. 1, p. 012085). IOP Publishing. doi:10.1088/1757- 899X/197/1/012085.
• [12] Vedpathak S. Optimization of Impingement Cooled Heat Sink using Experimental and CFD Simulation Methods. Int. J. Res. Appl. Sci. Eng. Technol., vol. 6, no. 7, pp. 122–131, Jul. 2018. doi:10.22214/ijraset.2018.7018.
• [13] D. Sharath, Sathyanarayana, and H. . Puneeth, “Heat Transfer Numerical Simulation and Optimization of a Heat Sinks,” in IOP Conference Series: Materials Science and Engineering, 2018, vol. 376, p. 012005. doi:10.1088/1757-899X/376/1/012005.
• [14] Caliskan S, Dogan A, Kotcioglu I. Experimental investigation of heat transfer from different pin fin in a rectangular channel. Exp. Heat Transf., pp. 1–17, Oct. 2018. doi.org/10.1080/08916152.2018.1526228.
• [15] Mohammed AA, Razuqi SA, Forced Convection Heat Transfer Of Axial Air Flow With Heatsink On Uniform Heat Flux. Heat Eng. Sustain. Dev., vol. 22, no. 2, pp. 10–21, 2018.
• [16] Dange M, Deshmukh MS. Experimental Analysis of Cylindrical Staggered Pin Fin Heat Sink for Force Convective Heat Transfer Variation and its Enhancement. Int. J. Latest Eng. Res. Appl., vol. 2, no. 8, pp. 128–133, 2017.
• [17] Tuckerman DB, Pease RFW. High-performance heat sinking for VLSI. IEEE Electron Device Lett., vol. 2, no. 5, pp. 126–129, 1981. doi: 10.1109/EDL.1981.25367.
• [18] Karatekin C, Kökkaya O. Comparative analysis of different cooling fin types for countering LED luminaires’ heat problems. journals.tubitak.gov.tr.
• [19] Alkasassbeh M, Omar Z, Mebarek‐Oudina F, Raza J, Chamkha A. Heat transfer study of convective fin with temperature‐dependent internal heat generation by hybrid block method. Heat Transfer—Asian Research. 2019 Jun;48(4):1225-44. doi.org/10.1002/htj.21428.
• [20] Muthukumarn R, Rathnasamy R, Karthikeyan R. Experimental Study of Performance of Pin Fin Heat Sink under Forced Convection. Int. J. Mech. Inf. Technol., vol. 04, no. 10, pp. 1791–1796, 2016. doi:10.18535/ijmeit/v4i10.02.
• [21] Kumar V, Rao B, Farooq Sk. Thermal Analysis of Rectangular and Tapered Pin fins heat sink using Icepak International Conference on Allied Technologies in Electrical & Communication systems, 2016.
• [22] Abuşka M, Şevik S, Altıntaş V. The Effect Of Blowing Direction On Heat Sink Performance By Thermal Imaging. Journal of Thermal Engineering, Yildiz Technical University Press, Istanbul, Turkey, Vol. 4, No. 6, pp. 2471-2480, October, 2018. doi: 10.18186/thermal.465695.