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Vortical structures and heat transfer in a round impinging jet

Published online by Cambridge University Press:  17 January 2008

M. HADŽIABDIĆ  and
K. HANJALIĆ
M. HADŽIABDIĆ
Affiliation:
Department of Multi-scale Physics, Delft University of Technology, Delft, The Netherlands
K. HANJALIĆ
Affiliation:
Department of Multi-scale Physics, Delft University of Technology, Delft, The Netherlands
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Abstract

In order to gain a better insight into flow, vortical and turbulence structure and their correlation with the local heat transfer in impinging flows, we performed large-eddy simulations (LES) of a round normally impinging jet issuing from a long pipe at Reynolds number Re = 20000 at the orifice-to-plate distance H = 2D, where D is the jet-nozzle diameter. This configuration was chosen to match previous experiments in which several phenomena have been detected, but the underlying physics remained obscure because of limitations in the measuring techniques applied. The instantaneous velocity and temperature fields, generated by the LES, revealed interesting time and spatial dynamics of the vorticity and eddy structures and their imprints on the target wall, characterized by tilting and breaking of the edge ring vortices before impingement, flapping, precessing, splitting and pairing of the stagnation point/line, local unsteady separation and flow reversal at the onset of radial jet spreading, streaks pairing and branching in the near-wall region of the radial jets, and others. The LES data provided also a basis for plausible explanations of some of the experimentally detected statistically-averaged flow features such as double peaks in the Nusselt number and the negative production of turbulence energy in the stagnation region. The simulations, performed with an in-house unstructured finite-volume code T-FlowS, using second-order-accuracy discretization schemes for space and time and the dynamic subgrid-scale stress/flux model for unresolved motion, showed large sensitivity of the results to the grid resolution especially in the wall vicinity, suggesting care must be taken in interpreting LES results in impinging flows.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 596 , 25 January 2008 , pp. 221 - 260
Copyright
Copyright © Cambridge University Press 2008

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References

Ashforth-Frost, S. & Jambunathan, K. 1996 a Effect of nozzle geometry and semi-confinement on the potential core of a turbulent axisymmetric free jet. Intl Commun Heat Mass Transfer 23, 155–162.CrossRefGoogle Scholar
Ashforth-Frost, S. & Jambunathan, K. 1996 b Numerical prediction of semi-confined jet impingement and comparison with experimental data. Intl J. Numer. Meth. Fluids 23, 295–306.3.0.CO;2-T>CrossRefGoogle Scholar
Baughn, J. W. & Shimizu, S. 1989 Heat transfer measurement from a surface with uniform heat flux and an impinging jet. Trans. ASME C: J. Heat Transfer 111, 1096.CrossRefGoogle Scholar
Beaubert, F. & Viazzo, S. 2003 Large eddy simulations of plane turbulent impinging jets at moderate Reynolds numbers. Intl J. Heat Fluid Flow 24, 512–519.CrossRefGoogle Scholar
Behnia, M., Parneix, S., Shabany, Y. & Durbin, P. A. 1999 Numerical study of turbulent heat transfer in confined and unconfined impinging jets. Intl J. Heat Mass Transfer 20, 1–9.Google Scholar
Chung, Y. M. & Luo, K. H. 2002 Unsteady heat transfer analysis of an impinging jet. Trans. ASME C: J. Heat Transfer 124, 1039–1048.CrossRefGoogle Scholar
Colucci, D. & Viskanta, R. 1996 Effect of nozzle geometry on local convective heat transfer to a confined impinging air jet. Expl Thermal Fluid Sci. 13, 71–80.CrossRefGoogle Scholar
Cooper, D., Jackson, D. C., Launder, B. E. & Liao, G. X. 1993 Impinging jet studies for turbulence model assessment-i. flow field experiments. Intl J. Heat Fluid Flow 36, 2675–2684.Google Scholar
Fröhlich, J. & Rodi, W. 2002 Introduction to large-eddy simulation of turbulent flows. In Closure Strategies for Turbulent and Transitional Flows (ed. Launder, B. E. & Sandham, N. D.), pp. 267–298. Cambridge University Press.CrossRefGoogle Scholar
Geers, L., Hanjalić, K. & Tummers, M. 2004 Experimental investigation of impinging jet arrays. Exps. Fluids 36, 946–958.CrossRefGoogle Scholar
Geers, L., Tummers, M. & Hanjalić, K. 2005 PIV-based identification of coherent structures in normally impinging multiple jet. Phys. Fluids 17, 055105:1–13.CrossRefGoogle Scholar
Geers, L., Hanjalić, K. & Tummers, M. 2006 Wall imprint of turbulent structures and heat transfer in multiple impinging jet arrays. J. Fluid Mech. 546, 255–284.CrossRefGoogle Scholar
Germano, M., Piomelli, U., Moin, P. & Cabot, W. H. 1991 A dynamic subgrid-scale eddy viscosity model. Phys. Fluids A 3, 1760–1765.CrossRefGoogle Scholar
Hadžiabdić, M. 2006 LES of flow and heat transfer in a round impinging jet. PhD thesis, Delft University of Technology, Delft, The Netherlands.Google Scholar
Han, B & Goldstein, R. J. 2003 Instantaneous energy separation in a free jet. Part i. Flow measurement and visualization. Intl J. Heat Mass Transfer 46, 3975–3981.CrossRefGoogle Scholar
Hanjalić, K., Popovac, M. & Hadžiabdić, M. 2004 A robust near-wall elliptic relaxation eddy-viscosity turbulence model for CFD. Intl J. Heat Fluid Flow 25, 1047–1051.CrossRefGoogle Scholar
Hattori, H. & Nagano, Y. 2004 Direct numerical simulation of turbulent heat transfer in plane impinging jet. Intl J. Heat Fluid Flow 25, 749–758.CrossRefGoogle Scholar
Kataoka, K. 1990 Impingement heat transfer augmentation due to large scale eddies. In Heat Transfer 1990, Proc. 9th Intl Heat Transfer Conf. vol. 1, pp. 255–273.Google Scholar
Lee, J. & Lee, S. J. 2000 The effect of nozzle configuration on stagnation region heat transfer enhancement of axisymmetric jet impingement. Intl J. Heat Mass Transfer 43, 3497–3509.CrossRefGoogle Scholar
Leonard, B. P. 1979 A stable and accurate convective modelling procedure based on quadratic upstream interpolation. Comput Meth. Appl. Mech. Engng 19, 59–98.CrossRefGoogle Scholar
Leonard, B. P. 1988 Simple high-accuracy resolution program for convective modelling of discontinuities. Intl J. Numer Meth. Fluids 8, 1291–1318.CrossRefGoogle Scholar
Livingood, J. N. B. & Hrycak, P. 1973 Impingement heat transfer from turbulent air jets to flat plates – a literature survey. NASA TM X–2778.Google Scholar
Lytle, D. & Webb, B. 1994 Air jet impingement heat transfer at low nozzle-plate spacings. Intl J. Heat Mass Transfer 37, 1687–1697.CrossRefGoogle Scholar
Lytle, D. & Webb, B. W. 1991 Secondary heat transfer maxima for air jet impingement at low nozzle-to-plate spacing. In Experimental Heat Transfer, Fluid Mechanics and Thermodynamics (ed. Keffer, J. F., Shah, R. K. & Ganic, E. N.). Elsevier.Google Scholar
Nishino, K., Samada, M., Kasuya, K. & Torii, K. 1996 Turbulence statistics in the stagnation region of an axisymmetric impinging jet flow. Intl J. Heat Fluid Flow 17, 93–201.CrossRefGoogle Scholar
Ničeno, B. 2001 An unstructured parallel algorithm for large eddy and conjugate heat transfer simulations. PhD thesis, Delft University of Technology, Delft, The Netherlands.Google Scholar
Ničeno, B. & Hanjalić, K. 2004 Unstructured Large-Eddy And Conjugate Heat Transfer Simulations Of Wall-Bounded Flows. In Modeling and Simulation of Turbulent Heat Transfer (Developments in Heat Transfer Series) (ed. Faghri, M. & Sunden, B.). WIT Press.Google Scholar
Olsson, M. & Fuchs, L. 1998 Large eddy simulation of a forced semiconfined circular impinging jet. Phys Fluids 10, 476–486.CrossRefGoogle Scholar
Pauley, L. R., Moin, P. & Reynolds, W. C. 1990 The structure of two-dimensional separation. J. Fluid Mech. 220, 397–411.CrossRefGoogle Scholar
Piomelli, U. & Chasnov, J. R. 1996 Large-eddy simulations: theory and applications. In Transition and Turbulence Modelling (ed. Henningson, A., Hallback, K., Alfredsson, L. & Johansson, M.). Kluwer.Google Scholar
Pope, S. B. 2000 Turbulent Flows. Cambridge University Press.CrossRefGoogle Scholar
Popiel, C. O. & Trass, O. 1991 Visualization of a free and impinging round jet. Expl Thermal Fluid Sci. 4, 253–264.CrossRefGoogle Scholar
den Toonder, J. M. J. & Nieuwstadt, F. T. M. 1997 Reynolds number effects in a turbulent pipe flow for low to moderate Re. Phys. Fluids 9, 3398–3409.CrossRefGoogle Scholar
Tsubokura, M., Kobayashi, T., Taniguchi, N. & Jones, W. P. 2003 A numerical study on the eddy structures of impinging jets excited at the inlet. Intl J. Heat Fluid Flow 24, 500–511.CrossRefGoogle Scholar
Viskanta, R. 1993 Heat transfer to impinging isothermal gas and flame jets. Expl Thermal Fluid Sci. 6, 111–134.CrossRefGoogle Scholar
Voke, P. R. & Gao, S. 1998 Numerical study of heat transfer from an impinging jet. Intl J. Heat Mass Transfer 41, 671–680.CrossRefGoogle Scholar
Yan, X. & Saniei, N. 1997 Heat transfer from an obliquely impinging circular air jet to a flat plate. Intl J. Heat Fluid Flow 18, 591–599.CrossRefGoogle Scholar
Yule, A. J. 1978 Large-scale structure in the mixing layer of a round jet. J. Fluid Mech. 3, 413–432.CrossRefGoogle Scholar