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An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples

Received: 11 May 2015     Accepted: 20 May 2015     Published: 29 May 2015
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Abstract

Dimples play a very important role in heat transfer enhancement of electronic cooling systems. In the current paper, the fluid flow and heat transfer characteristics of spherical dimples at different angle of orientation from the centre with apex facing the inlet were investigated. The experiment was carried out for laminar Natural convection conditions with air as a working fluid. The overall Nusselt numbers and heat transfer coefficient at different orientation angle of dimples were obtained. From the obtained results, it was observed that the Nusselt numbers and heat transfer coefficient increases with decrease in the orientation angle of dimples.

Published in American Journal of Electrical Power and Energy Systems (Volume 4, Issue 4)
DOI 10.11648/j.epes.20150404.11
Page(s) 34-38
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Electronic Cooling, Natural Convection, Dimples, Passive Techniques

References
[1] Zhang, D., Zheng, L., Xie, G., and Xie, Y.,An Experimental Study on Heat Transfer enhancement of Non-Newtonian Fluid in a Rectangular Channel with Dimples/Protrusions, Transactions of the ASME, Vol. 136, pp.021005-10, 2014.
[2] Beves, C.C., Barber, T.J., and Leonardi,E., An Investigation of Flow over Two-Dimensional Circular Cavity. In 15th Australasian Fluid Mechanics Conference, the University of Sydney, Australia, pp.13-17, 2004.
[3] Kuethe A. M., Boundary Layer Control of Flow Separation and Heat Exchange. US Patent No. 1191, 1970.
[4] Afanasyev,V.N.,Chudnovsky,Y.P.,Leontiev,A.I.,andRoganov,P.S.,Turbulent flow friction and heat transfer characteristics for spherical cavities on a flat plate. Experimental Thermal Fluid Science, Vol. 7, Issue 1, pp. 1–8, 1993.
[5] Chyu, M.K., Yu, Y., Ding, H., Downs, J.P., and Soechting, F.O., Concavity enhanced heat transfer in an internal cooling passage. In Orlando international Gs Turbine & Aero engine Congress & Exhibition, Proceedings of the 1997(ASME paper 97-GT-437), 1997.
[6] Mahmood,G.I.,Hill,M.L.,Nelson,D.L.,Ligrani,P.M.,Moon,H.K., and Glezer,B., Local heat transfer and flow structure on and above a dimpled surface in a channel. J Turbomach, Vol.123, Issue 1, pp: 115–23, 2001.
[7] Mahmood, G. I., andLigrani, P. M., Heat Transfer in a Dimpled Channel: Combined Influences of Aspect Ratio, Temperature Ratio, Reynolds Number, and Flow Structure. Int. J. Heat Mass Transfer, Vol.45, pp.2011–2020, 2002.
[8] Xie, G. N., Sunden, B., and Zhang, W. H., Comparisons of Pins/Dimples Protrusions Cooling Concepts for an Internal Blade Tip-Wall at High Reynolds Numbers. ASME J. Heat Transfer, Vol.133, Issue 6, pp. 0619021-0619029, 2011.
[9] Gadhave,G., and Kumar.P., Enhancement of forced Convection Heat Transfer over Dimple Surface-Review.International Multidisciplinary e - Journal .Vol-1, Issue-2, pp.51-57, 2012
[10] Katkhaw, N., Vorayos, N., Kiatsiriroat, T., Khunatorn, Y., Bunturat, D., and Nuntaphan., A. Heat transfer behavior of flat plate having 450 ellipsoidal dimpled surfaces. Case Studies in Thermal Engineering, vol.2, pp. 67–74, 2014
[11] Patel,I.H .,andBorse ,S.H. Experimental investigation of heat transfer enhancement over the dimpled surface. International Journal of Engineering Science and Technology,Vol.4, Issue 6,pp.3666–3672, 2012.
[12] Faheem Akhtar, Abdul Razak R Kaladgi and Mohammed Samee, Heat transfer augmentation using dimples in forced convection -an experimental approach. Int. J. Mech. Eng. & Rob. Res. Vol4,Issue 1 ,pp 150-153,2015.
[13] Faheem Akhtar, Abdul Razak R Kaladgi and Mohammed Samee, Heat transfer enhancement using dimple surfaces under natural convection—an experimental study, Int. J. Mech. Eng. & Rob. Res. Vol 4, Issue1, pp 173-175, 2015.
[14] Yu Rao ,Yamin Xu,Chaoyi Wan,A Numerical Study of the Flow and Heat Transfer in the Pin Fin-Dimple Channels With Various Dimple Depths, Journal of Heat Transfer ,Transactions of the ASME,Vol. 134, pp-071902-1-9, 2012.
[15] P.M. Ligrani, J.L. Harrison, G.I. Mahmood, M.L. Hill, Flow structure due to dimple depression on a channel surface, Phys. Fluids 13 (2001) 3442–3451.
[16] Hasibur Rahman Sardar and Abdul Razak Kaladgi ,Forced Convection Heat Transfer Analysis through Dimpled Surfaces with Different Arrangements, American Journal of Energy Engineering Vol 3 ,Issue 3,pp 37-45,2015.
Cite This Article
  • APA Style

    Amjad Khan, Mohammed Zakir Bellary, Mohammad Ziaullah, Abdul Razak Kaladgi. (2015). An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples. American Journal of Electrical Power and Energy Systems, 4(4), 34-38. https://doi.org/10.11648/j.epes.20150404.11

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    ACS Style

    Amjad Khan; Mohammed Zakir Bellary; Mohammad Ziaullah; Abdul Razak Kaladgi. An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples. Am. J. Electr. Power Energy Syst. 2015, 4(4), 34-38. doi: 10.11648/j.epes.20150404.11

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    AMA Style

    Amjad Khan, Mohammed Zakir Bellary, Mohammad Ziaullah, Abdul Razak Kaladgi. An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples. Am J Electr Power Energy Syst. 2015;4(4):34-38. doi: 10.11648/j.epes.20150404.11

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  • @article{10.11648/j.epes.20150404.11,
      author = {Amjad Khan and Mohammed Zakir Bellary and Mohammad Ziaullah and Abdul Razak Kaladgi},
      title = {An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples},
      journal = {American Journal of Electrical Power and Energy Systems},
      volume = {4},
      number = {4},
      pages = {34-38},
      doi = {10.11648/j.epes.20150404.11},
      url = {https://doi.org/10.11648/j.epes.20150404.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20150404.11},
      abstract = {Dimples play a very important role in heat transfer enhancement of electronic cooling systems. In the current paper, the fluid flow and heat transfer characteristics of spherical dimples at different angle of orientation from the centre with apex facing the inlet were investigated. The experiment was carried out for laminar Natural convection conditions with air as a working fluid. The overall Nusselt numbers and heat transfer coefficient at different orientation angle of dimples were obtained. From the obtained results, it was observed that the Nusselt numbers and heat transfer coefficient increases with decrease in the orientation angle of dimples.},
     year = {2015}
    }
    

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  • TY  - JOUR
    T1  - An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples
    AU  - Amjad Khan
    AU  - Mohammed Zakir Bellary
    AU  - Mohammad Ziaullah
    AU  - Abdul Razak Kaladgi
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    DO  - 10.11648/j.epes.20150404.11
    T2  - American Journal of Electrical Power and Energy Systems
    JF  - American Journal of Electrical Power and Energy Systems
    JO  - American Journal of Electrical Power and Energy Systems
    SP  - 34
    EP  - 38
    PB  - Science Publishing Group
    SN  - 2326-9200
    UR  - https://doi.org/10.11648/j.epes.20150404.11
    AB  - Dimples play a very important role in heat transfer enhancement of electronic cooling systems. In the current paper, the fluid flow and heat transfer characteristics of spherical dimples at different angle of orientation from the centre with apex facing the inlet were investigated. The experiment was carried out for laminar Natural convection conditions with air as a working fluid. The overall Nusselt numbers and heat transfer coefficient at different orientation angle of dimples were obtained. From the obtained results, it was observed that the Nusselt numbers and heat transfer coefficient increases with decrease in the orientation angle of dimples.
    VL  - 4
    IS  - 4
    ER  - 

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Author Information
  • Department of Electronics and communication Engineering, P.A College of Engineering, Mangalore, Karnataka, India

  • Department of Electronics and communication Engineering, P.A College of Engineering, Mangalore, Karnataka, India

  • Department of Electronics and communication Engineering, P.A College of Engineering, Mangalore, Karnataka, India

  • Department of Mechanical Engineering, P.A College of Engineering, Mangalore, Karnataka, India

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