Numerical Investigation of Impingement Heat Transfer Enhancement on a Flat Plate with an Attached Porous Medium

Abstract:

The enhancement of impingement heat transfer on a flat plate covered with a thick layer of porous medium with or without a center hole was numerically investigated. The renormalization group turbulence model is selected for the fluid region while Forchheimer extended Darcy’s model is used for porous region. The numerical models were justified by comparisons with available experimental data. Computational results show that an attached porous medium with a center hole can effectively enhance jet impingement heat transfer while an attached thick porous layer without a center hole has detrimental effect. The physics of these results are supported and well explained by the detailed flow patterns. The most influential parameters in this heat transfer process include the jet Reynolds number and the center hole geometry (hole depth and jet-to-hole diameter ratio). A good hole geometry should well trap the jet and direct the coolant along the heated plate.

• Periodical: Defect and Diffusion Forum (Volumes 312-315)
• Pages: 477-482
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.312-315.477
• Online since: April 2011
• Authors: Pey Shey Wu, Yi Wen Lo, Fong Chia Cheng
• Keywords: Center Hole, Heat Transfer, Impingement, Numerical, Thick Porous Layer

References

[1] K. Sultan, C.T. DeGroot, A.G. Straatman, N.C. Gallego and H. Hangan: Int. J. Heat Mass Transf. Vol. 52 (2009), p.4296.

[2] T.M. Jeng, S.C. Tzeng and T.C. Liu: Int. J. Heat Mass Transf. Vol. 51 (2008), p.1205.

[3] D.R. Graminho and M.J.S. de Lemos: Int. J. Heat Mass Transf. Vol. 52 (2009), p.680.

[4] R. Yakkatelli, Q. Wu and A.S. Fleischer: Exp. Therm. Fluid Sci. (2010), article in press.

[5] W.S. Fu and H.C. Huang: Int. J. Heat Mass Transf. Vol. 40 (1997), p.2261.

[6] A. Sivasamy, V. Selladurai and P. Rajesh Kanna: Int. J. Heat Mass Transf. Vol. 49 (2010), p.1238.

[7] T.M. Jeng and S.C. Tzeng: Int. J. Heat Mass Transf. Vol. 48 (2005), p.4685.

[8] T.M. Jeng and S.C. Tzeng: Int. J. Heat Mass Transf. Vol. 35 (2008), p.30.

[9] P.S. Wu, C.Y. Hsieh and S.T. Tsai: Defect Diff. Forum Vol. 297-301 (2010), p.427.

[10] B.V. Antohe and J.L. Lage: Int. J. Heat Mass Transf. Vol. 40 (1997), p.3013.

[11] M. Prakash, Ö.F. Turan, Y. Li, J. Mahoney and G.R. Thorpe: Chem. Eng. Sci. Vol. 56 (2001), p.3855.

[12] A. Bhattacharya, V.V. Calmidi and R.L. Mahajan: Int. J. Heat Mass Transf. Vol. 45 (2002), p.1017.