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Heat transfer enhancement by coated fins in the microscale domain

Micro-fins configuration is considered as a capable cooling method for microelectronic components due to its space optimization and types of heat transfer. In this study micro-fins profile is selected according to the type of heat transfer and fabricated on copper and aluminum materials through Wire-cut Electric Discharge Machining (WEDM) process. The four numbers of square test pieces of dimensions of 4.5× 4.5 cm and fin height (H) of 0.25 mm with different spacing(S) of 3.75 mm and 5 mm are considered for the experimentation. The fabricated test pieces such as Aluminum, Copper, painted Aluminum and painted Copper are used in this experiments. This paper aims to improve the convective heat transfer coefficient by applying aluminum paint coating on a micro-fin structure. The paint coated copper test piece produces 20.62% higher heat transfer compared to aluminum test piece. On comparing the aluminum with aluminum paint coated test piece, the convective heat transfer rate found to increase by 49%. Coated aluminum test piece with 3.75 mm and 5 mm spacing shows higher radiation heat transfer compared to other micro fin structures.
PAPER REVISED: 2017-02-23
PAPER ACCEPTED: 2017-02-28
  1. Philip, A. P., et al., Aluminum-based one- and two-dimensional micro fin array structures: high-throughput fabrication and heat transfer testing, Journal of Micromechanics and Microengineering, 27 (2017), 2
  2. Micheli, L., et al., Thermal effectiveness and mass usage of horizontal micro-fins under natural convection , Applied Thermal Engineering, 97 (2016),pp.39-47
  3. Shahzad, M.I., et al. ,Convective Heat Transfer Enhancement for Electronic Device Applications using Patterned MWCNTs Structures, Heat Transfer Engineering, 37 (2016), 9, pp.783-790
  4. Devdatta, P. K., and Debendra, K. D., Analytical and numerical studies on micro scale heat sinks for electronic applications, Applied Thermal Engineering, 25 (2005), pp.2432-2449
  5. Holman, J. P., and Souvik Bhattacharyya, Heat Transfer, Tata McGraw Hill Education Private Limited., New Delhi, India, 2011
  6. Ingrid Martorell., et al., Natural Convection from narrow horizontal plates at moderate Rayleigh numbers, International Journal of Heat and Mass Transfer, 46 (2003), pp. 2389-2402
  7. Innocent Nkurikiyimfura.,et al., Heat transfer enhancement by magnetic nanofluids, Renew.sustain.Energy Rev. 21 (2013), pp. 548-561
  8. Kothandaraman, Fundamentals of Heat and Mass Transfer, New Age International (P) Limited, New Delhi ,India, 2013, pp.149-195
  9. Khan. N., Pool boiling heat transfer enhancement by surface modification/micro structures for electronics cooling, Proceedings of 6th International Electronics Packaging Technology Conference, 2004, pp. 273-280
  10. Micheli,L., et al., General correlations among geometry, orientation and thermal performance of natural convective micro finned heat sinks, International Journal of Heat and Mass Transfer, 91 (2015), pp. 711-724
  11. Mahmound.S., et al., Effect of micro fin geometry on natural convection heat transfer of horizontal micro structures, Applied Thermal Engineering, 31(2011), pp. 627-633
  12. Mi Zhou and Tianquan Lin., Highly Conductive Porous Graphene/Ceramic Composites for Heat Transfer and Thermal Energy Storage, Advanced Functional Materials, 23 (2012),18,pp.2263-2269
  13. Paisarn naphon and Lursukd Nakharintr, Turbulent two phase approach model for the nano fluids heat transfer analysis flowing through the mini channel heat sinks, International Journal of Heat and Mass Transfer, 82 (2015), pp. 388-395
  14. Sachdeva, R.C, Fundamentals of Engineering Heat and Mass Transfer, New Age International (P) Limited, New Delhi, India, 2003
  15. Sujith Kumar, An experimental investigation on flow boiling heat transfer enhancement using spray pyrolysed alumina porous coatings, Applied Thermal Engineering, 71 (2014), pp. 508-518
  16. Taha, Convective Heat Transfer Enhancement Using Carbon Nanofibers (CNFs), Influence of Amorphous Carbon Layer on Heat Transfer Performance, Proceedings of the 4th Micro/Nanoscale Heat & Mass Transfer, 2013, 22196
  17. Ventola, Micro-structured rough surfaces by laser etching for heat transfer enhancement on flush mounted heat sinks , Journal of Physics, (2014) Conf. Ser. 525 , 012017
  18. Yunus A.Cengel, Heat and Mass Transfer-A practical approach, Tata McGraw-Hill Education Pvt. Ltd, New Delhi, India 2007,pp. 503-542