Numerical and Experimental Investigations on Jet Impingement Cooling
Effective cooling of electronic equipment has emerged
as a challenging and constraining problem of the new century. In the
present work the feasibility and effectiveness of jet impingement
cooling on electronics were investigated numerically and
experimentally. Studies have been conducted to see the effect of the
geometrical parameters such as jet diameter (D), jet to target
spacing (Z) and ratio of jet spacing to jet diameter (Z/D) on the heat
transfer characteristics. The values of Reynolds numbers considered
are in the range 7000 to 42000. The results obtained from the
numerical studies are validated by conducting experiments. From the
studies it is found that the optimum value of Z/D ratio is 5. For a
given Reynolds number, the Nusselt number increases by about 28%
if the diameter of the nozzle is increased from 1mm to 2mm.
Correlations are proposed for Nusselt number in terms of Reynolds
number and these are valid for air as the cooling medium.
[1] X. Liu, V.J.H. Lienvard, and J.S. Lombara, "Convective heat transfer by
impingement of circular liquid jets", J. Heat Transfer vol.113, 1991, pp.
571 - 582.
[2] J.W. Baughn, A.E. Hechanova and X. Yan, "An experimental study of
entrainment effects on the heat transfer from a flat surface to a heated
circular impinging jet", J. Heat Transfer vol. 113,1991, pp. 1023 - 1025.
[3] K Jambunathan, E. Lai, M.A. Moss and B.L. Button, "A review of heat
transfer data for single circular jet impingement", Int.J.Heat Fluid Flow
vol.13, 1992, pp. 106 - 115.
[4] R. Viskanta, "Heat transfer to impinging isothermal gas and flame jets".
Exp. Therm. Fluid Sci.vol.6, 1993, pp. 111-134.
[5] D. Lytle and B.W. Webb, "Air jet impingement heat transfer at low
nozzle-plate spacing-s", Int. J. Heat Mass Transfer, vol.37, 1994, pp.
1687 - 1697.
[6] S.V. Garimella, "Heat transfer & flow fields in confined jet
impingement", Ann. Rev. Heat Transfer, vol.11, 1999, pp.413 - 494
ch.7.
[7] I. Sezai and A.A. Mohamed, "Three dimensional simulations of laminar
rectangular impinging jets, flow structure and heat transfer", ASME J.
Heat Transfer, vol.121, 1999, pp.50 - 56.
[8] S.Z. Shuja, B.S. Yilbas, and M. Rashid, "Confined swirling jet
impingement onto anadiabatic wall", Int. J. Heat Mass Transfer, vol. 46,
2003, pp. 2947 - 2955.
[9] Juan.T, Jie-min.Z, Li.J and Ying. Y " Experimental research on heat
transfer of confined air jet impingement with tiny size round nozzle in
high density electronics packaging model", ieeeexplore.com,2005.
[10] H.G. Lee, H.S. Yoon and M.Y. H, "A numerical investigation on the
fluid flow and heat transfer in the confined impinging slot jet in the low
Reynolds number region for different channel heights", International
Journal of Heat and Mass Transfer, vol. 51, 2008, pp. 4055 - 4068.
[11] Yahya Erkan Akansu, Mustafa Sarioglu , Kemal Kuvvet B and Tahir
Yavuz, "Flow field and heat transfer characteristics in an oblique slot jet
impinging on a flat plate", International Communications in Heat and
Mass Transfer, vol. 35, 2008, pp. 873 - 880.
[1] X. Liu, V.J.H. Lienvard, and J.S. Lombara, "Convective heat transfer by
impingement of circular liquid jets", J. Heat Transfer vol.113, 1991, pp.
571 - 582.
[2] J.W. Baughn, A.E. Hechanova and X. Yan, "An experimental study of
entrainment effects on the heat transfer from a flat surface to a heated
circular impinging jet", J. Heat Transfer vol. 113,1991, pp. 1023 - 1025.
[3] K Jambunathan, E. Lai, M.A. Moss and B.L. Button, "A review of heat
transfer data for single circular jet impingement", Int.J.Heat Fluid Flow
vol.13, 1992, pp. 106 - 115.
[4] R. Viskanta, "Heat transfer to impinging isothermal gas and flame jets".
Exp. Therm. Fluid Sci.vol.6, 1993, pp. 111-134.
[5] D. Lytle and B.W. Webb, "Air jet impingement heat transfer at low
nozzle-plate spacing-s", Int. J. Heat Mass Transfer, vol.37, 1994, pp.
1687 - 1697.
[6] S.V. Garimella, "Heat transfer & flow fields in confined jet
impingement", Ann. Rev. Heat Transfer, vol.11, 1999, pp.413 - 494
ch.7.
[7] I. Sezai and A.A. Mohamed, "Three dimensional simulations of laminar
rectangular impinging jets, flow structure and heat transfer", ASME J.
Heat Transfer, vol.121, 1999, pp.50 - 56.
[8] S.Z. Shuja, B.S. Yilbas, and M. Rashid, "Confined swirling jet
impingement onto anadiabatic wall", Int. J. Heat Mass Transfer, vol. 46,
2003, pp. 2947 - 2955.
[9] Juan.T, Jie-min.Z, Li.J and Ying. Y " Experimental research on heat
transfer of confined air jet impingement with tiny size round nozzle in
high density electronics packaging model", ieeeexplore.com,2005.
[10] H.G. Lee, H.S. Yoon and M.Y. H, "A numerical investigation on the
fluid flow and heat transfer in the confined impinging slot jet in the low
Reynolds number region for different channel heights", International
Journal of Heat and Mass Transfer, vol. 51, 2008, pp. 4055 - 4068.
[11] Yahya Erkan Akansu, Mustafa Sarioglu , Kemal Kuvvet B and Tahir
Yavuz, "Flow field and heat transfer characteristics in an oblique slot jet
impinging on a flat plate", International Communications in Heat and
Mass Transfer, vol. 35, 2008, pp. 873 - 880.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:54193", author = "Arun Jacob and Leena R. and Krishnakumar T.S. and Jose Prakash M.", title = "Numerical and Experimental Investigations on Jet Impingement Cooling", abstract = "Effective cooling of electronic equipment has emerged
as a challenging and constraining problem of the new century. In the
present work the feasibility and effectiveness of jet impingement
cooling on electronics were investigated numerically and
experimentally. Studies have been conducted to see the effect of the
geometrical parameters such as jet diameter (D), jet to target
spacing (Z) and ratio of jet spacing to jet diameter (Z/D) on the heat
transfer characteristics. The values of Reynolds numbers considered
are in the range 7000 to 42000. The results obtained from the
numerical studies are validated by conducting experiments. From the
studies it is found that the optimum value of Z/D ratio is 5. For a
given Reynolds number, the Nusselt number increases by about 28%
if the diameter of the nozzle is increased from 1mm to 2mm.
Correlations are proposed for Nusselt number in terms of Reynolds
number and these are valid for air as the cooling medium.", keywords = "CFD, heat transfer coefficient, Nusselt number, ratio of jet diameter to jet spacing (Z/D), Reynolds number, turbulence model.", volume = "7", number = "3", pages = "396-5", }