An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates

Amjad Khan; Mohammed Zakir Bellary; Mohammad Ziaullah; Abdul Razak Kaladgi

doi:doi:10.11648/j.epes.20150403.12

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An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates

Amjad Khan, Mohammed Zakir Bellary, Mohammad Ziaullah, Abdul Razak Kaladgi

Published in American Journal of Electrical Power and Energy Systems (Volume 4, Issue 3)

Received: 6 May 2015 Accepted: 13 May 2015 Published: 29 May 2015

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Abstract

Dimples play a very important role in the heat transfer enhancement of electronic cooling systems. In the current paper, the flow and heat transfer characteristics of spherical dimples of non uniform diameter were investigated. The experiment was carried out under laminar forced convection conditions using air as a working fluid. The overall Nusselt number and heat transfer coefficient at different dimple structures were obtained for various inlet air flow rates. From the obtained results, it was observed that the heat transfer coefficient and Nusselt number were high for the plate in which the diameter of dimples increases centrally in the direction of flow as compared to the other cases.

Published in	American Journal of Electrical Power and Energy Systems (Volume 4, Issue 3)
DOI	10.11648/j.epes.20150403.12
Page(s)	29-33
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

Forced Convection, Electronic Cooling, Dimples, Passive Techniques

References

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[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., and Roganov, 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 Gas 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 Turbo mach, Vol.123, Issue 1, pp: 115–23, 2001.
[7]	Mahmood, G. I., and Ligrani, 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., and Borse, 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. Vol 4, 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, Issue 1, 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.

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APA Style

Amjad Khan, Mohammed Zakir Bellary, Mohammad Ziaullah, Abdul Razak Kaladgi. (2015). An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates. American Journal of Electrical Power and Energy Systems, 4(3), 29-33. https://doi.org/10.11648/j.epes.20150403.12

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ACS Style

Amjad Khan; Mohammed Zakir Bellary; Mohammad Ziaullah; Abdul Razak Kaladgi. An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates. Am. J. Electr. Power Energy Syst. 2015, 4(3), 29-33. doi: 10.11648/j.epes.20150403.12

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AMA Style

Amjad Khan, Mohammed Zakir Bellary, Mohammad Ziaullah, Abdul Razak Kaladgi. An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates. Am J Electr Power Energy Syst. 2015;4(3):29-33. doi: 10.11648/j.epes.20150403.12

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@article{10.11648/j.epes.20150403.12,
  author = {Amjad Khan and Mohammed Zakir Bellary and Mohammad Ziaullah and Abdul Razak Kaladgi},
  title = {An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates},
  journal = {American Journal of Electrical Power and Energy Systems},
  volume = {4},
  number = {3},
  pages = {29-33},
  doi = {10.11648/j.epes.20150403.12},
  url = {https://doi.org/10.11648/j.epes.20150403.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20150403.12},
  abstract = {Dimples play a very important role in the heat transfer enhancement of electronic cooling systems. In the current paper, the flow and heat transfer characteristics of spherical dimples of non uniform diameter were investigated. The experiment was carried out under laminar forced convection conditions using air as a working fluid. The overall Nusselt number and heat transfer coefficient at different dimple structures were obtained for various inlet air flow rates. From the obtained results, it was observed that the heat transfer coefficient and Nusselt number were high for the plate in which the diameter of dimples increases centrally in the direction of flow as compared to the other cases.},
 year = {2015}
}

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TY  - JOUR
T1  - An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates
AU  - Amjad Khan
AU  - Mohammed Zakir Bellary
AU  - Mohammad Ziaullah
AU  - Abdul Razak Kaladgi
Y1  - 2015/05/29
PY  - 2015
N1  - https://doi.org/10.11648/j.epes.20150403.12
DO  - 10.11648/j.epes.20150403.12
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  - 29
EP  - 33
PB  - Science Publishing Group
SN  - 2326-9200
UR  - https://doi.org/10.11648/j.epes.20150403.12
AB  - Dimples play a very important role in the heat transfer enhancement of electronic cooling systems. In the current paper, the flow and heat transfer characteristics of spherical dimples of non uniform diameter were investigated. The experiment was carried out under laminar forced convection conditions using air as a working fluid. The overall Nusselt number and heat transfer coefficient at different dimple structures were obtained for various inlet air flow rates. From the obtained results, it was observed that the heat transfer coefficient and Nusselt number were high for the plate in which the diameter of dimples increases centrally in the direction of flow as compared to the other cases.
VL  - 4
IS  - 3
ER  -

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Author Information

Amjad Khan

Department of Electronics and communication Engineering, P.A College of Engineering, Mangalore, Karnataka, India
Mohammed Zakir Bellary

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

Department of Electronics and communication Engineering, P.A College of Engineering, Mangalore, Karnataka, India
Abdul Razak Kaladgi

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

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Plain Text BibTeX RIS

APA Style

Amjad Khan, Mohammed Zakir Bellary, Mohammad Ziaullah, Abdul Razak Kaladgi. (2015). An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates. American Journal of Electrical Power and Energy Systems, 4(3), 29-33. https://doi.org/10.11648/j.epes.20150403.12

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ACS Style

Amjad Khan; Mohammed Zakir Bellary; Mohammad Ziaullah; Abdul Razak Kaladgi. An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates. Am. J. Electr. Power Energy Syst. 2015, 4(3), 29-33. doi: 10.11648/j.epes.20150403.12

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AMA Style

Amjad Khan, Mohammed Zakir Bellary, Mohammad Ziaullah, Abdul Razak Kaladgi. An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates. Am J Electr Power Energy Syst. 2015;4(3):29-33. doi: 10.11648/j.epes.20150403.12

Copy | Download

@article{10.11648/j.epes.20150403.12,
  author = {Amjad Khan and Mohammed Zakir Bellary and Mohammad Ziaullah and Abdul Razak Kaladgi},
  title = {An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates},
  journal = {American Journal of Electrical Power and Energy Systems},
  volume = {4},
  number = {3},
  pages = {29-33},
  doi = {10.11648/j.epes.20150403.12},
  url = {https://doi.org/10.11648/j.epes.20150403.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20150403.12},
  abstract = {Dimples play a very important role in the heat transfer enhancement of electronic cooling systems. In the current paper, the flow and heat transfer characteristics of spherical dimples of non uniform diameter were investigated. The experiment was carried out under laminar forced convection conditions using air as a working fluid. The overall Nusselt number and heat transfer coefficient at different dimple structures were obtained for various inlet air flow rates. From the obtained results, it was observed that the heat transfer coefficient and Nusselt number were high for the plate in which the diameter of dimples increases centrally in the direction of flow as compared to the other cases.},
 year = {2015}
}

Copy | Download

TY  - JOUR
T1  - An Experimental Approach to Determine the Effect of Different Orientation of Dimples on Flat Plates
AU  - Amjad Khan
AU  - Mohammed Zakir Bellary
AU  - Mohammad Ziaullah
AU  - Abdul Razak Kaladgi
Y1  - 2015/05/29
PY  - 2015
N1  - https://doi.org/10.11648/j.epes.20150403.12
DO  - 10.11648/j.epes.20150403.12
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  - 29
EP  - 33
PB  - Science Publishing Group
SN  - 2326-9200
UR  - https://doi.org/10.11648/j.epes.20150403.12
AB  - Dimples play a very important role in the heat transfer enhancement of electronic cooling systems. In the current paper, the flow and heat transfer characteristics of spherical dimples of non uniform diameter were investigated. The experiment was carried out under laminar forced convection conditions using air as a working fluid. The overall Nusselt number and heat transfer coefficient at different dimple structures were obtained for various inlet air flow rates. From the obtained results, it was observed that the heat transfer coefficient and Nusselt number were high for the plate in which the diameter of dimples increases centrally in the direction of flow as compared to the other cases.
VL  - 4
IS  - 3
ER  -

Copy | Download