Numerical Investigation of Thermal Performance of a Combined Heat Sink with Various Microchannel Shapes
Keywords:
Thermal performance, Uniform heat flux, Maximum temperature, Combined heat sink, Lowest temperature, Microchannel shapeAbstract
The influence of channel shape on a combined heat sink of three different channel forms is investigated numerically in this work. The channel shapes considered were the trapezoidal, inverse trapezoidal and hexagonal microchannel shapes. The goal of this study was to compare and identify the combined microchannel shape that performed best under conditions of high uniform heat flux. The thermal performance of the combined heat sink was assessed using two criteria: lowest maximum temperature and lowest temperature elevation on the bottom of the combined heat sink where heat is applied. The uniform heat flux applied to the bottom of the combined heat sink was elevated from to . For the maximum heat flux of and lowest pressure drop of 10kPa considered, in terms of temperature elevation on the bottom of the heat sink where heat is applied, the trapezoidal combined microchannel heat sink outperformed other channel shapes. When the minimized overall maximum temperature is considered, the hexagonal combined microchannel heat sink was the best combined heat sink.
References
Abdel-Rehim, Z. S. (2008). Optimization and thermal performance assessment of pin-fin heat sinks. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 31(1): 51-65.
Adewumi, O. O.; T. Bello-Ochende and J. P. Meyer (2013). Constructal design of combined microchannel and micro pin fins for electronic cooling. International Journal of Heat and Mass Transfer, 66: 315-323.
ANSYS FLUENT 14.0 (2011) User’s Guide Documentation, ANSYS Inc.
ANSYS FLUENT 14.0 User’s Guide, ANSYS, Inc., Southpointe, 2011.
Bello-Ochende, T. (2015). Multi-scale pin fins: Scale analysis and mathematical optimization of micro-pin fins arranged in rows. Open Engineering, 5(1):238-247.
Bello-Ochende, T.; L. Liebenberg and J. P. Meyer. (2007). Constructal cooling channels for micro-channel heat sinks. International Journal of Heat and Mass Transfer, 50(21-22): 4141-4150.
Bello-Ochende, T.; J. P. Meyer and F. U. Ighalo. (2010). Combined numerical optimization and constructal theory for the design of microchannel heat sinks. Numerical Heat Transfer, Part A: Applications, 58(11): 882-899.
Chen, Y.; C. Zhang; M. Shi and J. Wu. (2009). Three-dimensional numerical simulation of heat and fluid flow in noncircular microchannel heat sinks. International Communications in Heat and Mass Transfer, 36(9): 917-920.
Garg, H.; V. S. Negi; A. S. Wadhwa and A. K. Lall. (2014). Numerical analysis of different shapes of microchannel for miniature cooling system. Paper presented at 2014 Recent Advances in Engineering and Computational Sciences (RAECS), Chandigarh, 1-7, India: IEEE.
Glazar, V.; B. Frankovic and A. Trp. (2015). Experimental and numerical study of the compact heat exchanger with different microchannel shapes. International Journal of Refrigeration, 51: 144-153.
Hasan, M. I. and Muter, D. M. (2019). Study the micro pin fin and micro channel heat sinks with different types of cooling fluids. Presented in First International Scientific Conference of Al-Ayen University (ISCAU 2019), Nasiriyah, 0-32, Iraq.
Hasan, M. I. and Tbena, H. L. (2018). Enhancing the cooling performance of micro pin fin heat sink by using the phase change materials with different configurations. Paper presented in 2018 International Conference on Advance of Sustainable Engineering and its Application (ICASEA), Wasit-Kut, 205-209, Iraq: IEEE.
İzci, T.; M. Koz and A. Koşar. (2015). The effect of micro pin-fin shape on thermal and hydraulic performance of micro pin-fin heat sinks. Heat Transfer Engineering, 36(17): 1447-1457.
Jadhav, S. V.; P. M. Pawar and B. P. Ronge. (2018). Analysis of pin-fin geometry effect on microchannel heat sink performance. International Journal of Mechanical and Production Engineering Research and Development, 8(4): 653-666.
Jagadale, V. A.; S. M. Sarange; S. V. Jadhav and A. G. Kamble. (2020). Thermal Analysis of Micro Channel Heat Sink with Various Shapes of Dimples. Techno-Societal 2018: Proceedings of the 2nd International Conference on Advanced Technologies for Societal Applications. Marahashtra, 841-854, India.
Khan, W.A.; A.; J. R. Culham and M. M. Yovanovich. (2006). Performance of shrouded pin-fin heat sinks for electronic cooling. Journal of Thermophysics and Heat Transfer, 20(3): 408-414.
Khan, A. A. and Kim, K. Y. (2013). Performance analysis of various geometrical shapes of microchannel heat sink. Proceedings of the Korean Society of Fluid Mechanics Conference, Jeju, 27-29, South Korea.
Khan, A. A.; S. M. Kim and K. Y. Kim. (2016). Multi-objective optimization of an inverse trapezoidal-shaped microchannel. Heat Transfer Engineering, 37(6): 571-580.
Khan, W. A.; J. R. Culham and M. M. Yovanovich. (2006). The role of fin geometry in heat sink performance. Transactions of the ASME, 128: 324-330.
Magnini, M. and Matar, O. K. (2020). Numerical study of the impact of the channel shape on microchannel boiling heat transfer. International Journal of Heat and Mass Transfer, 150: 119322.
Meyer, J. P.; O. T. Olakoyejo and T. Bello-Ochende. (2012). Constructal optimisation of conjugate triangular cooling channels with internal heat generation. International communications in heat and mass transfer, 39(8): 1093-1100.
Muzychka, Y. S. (2005). Constructal design of forced convection cooled microchannel heat sinks and heat exchangers. Paper presented in International Conference on Nanochannels, Microchannels, and Minichannels, Toronto, Ontario, 647-655, Canada.
Olakoyejo, O. T. and Meyer, J. P. (2014). Numerical optimisation of square pin-fins for minimum thermal resistance with non-uniform design dimensions. International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2014), Orlando, Florida, 1244-1251.
Olakoyejo, O. T.; T. Bello-Ochende and J. P. Meyer. (2012). Constructal conjugate cooling channels with internal heat generation. International Journal of Heat and Mass Transfer, 55(15-16): 4385-4396.
Roy, R. and Kundu, B. (2018). Effects of fin shapes on heat transfer in microchannel heat sinks. Heat Transfer—Asian Research, 47(4): 646-659.
Salimpour, M. R.; M. Sharifhasan and E. Shirani. (2013). Constructal optimization of microchannel heat sinks with noncircular cross sections. Heat Transfer Engineering, 34(10): 863-874.
Teja, V. S.; A. Ramakrishna and R. Rao. (2014). Numerical study of different cross-sectional stacked microchannel heat sink. International Journal of Engineering Research & Technology, 3(8): 54-59.
Tuckerman, D. B. and Pease, R. F. W. (1981). High-performance heat sinking for VLSI. IEEE Electron device letters, 2(5): 126-129.
Wei, X. and Joshi, Y. (2003). Optimization study of stacked micro-channel heat sinks for micro-electronic cooling. IEEE transactions on components and packaging technologies, 26(1): 55-61.
Yadav, S. and Pandey, K. M. (2018). A comparative thermal analysis of pin fins for improved heat transfer in forced convection. Materials Today: Proceedings, 5(1): 1711-1717.
Additional Files
Published
Issue
Section
License
Copyright (c) 2022 Nigerian Journal of Technological Development
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
In accordance with the Copyright Act of 1976, which became effective January 1, 1978, the following statement signed by each author must accompany the manuscript submitted: "I, the undersigned author, transfer all copyright ownership of the manuscript referenced above to the Nigerian Journal of Technological Development, in the event the work is published. I warrant that the article is original, does not infringe upon any copyright or other proprietary right of any third party, is not under consideration by another journal, and has not been published previously. I have reviewed and approve the submitted version of the manuscript and agree to its publication in the Nigerian Journal of Technological Development." A copyright transfer form should be downloaded from the NJTD Website ( http://njtd.com.ng/index.php/njtd). Author(s) will be consulted, whenever possible, regarding republication of material. All authors must have access to the data presented and the authors and sponsor (if applicable) must agree to share original data with the editor if requested.
