$k-{\varepsilon}-{\overline{v^{'2}}}$난류 모델을 이용한 충돌 제트의 유동 및 열전달 특성에 관한 수치해석적 연구



Choi, Bum-Ho;Lee, Jung-Hee;Choi, Young-Ki

  • 발행 : 2000.02.01


This study deals with jet impingement, which is extensively used in the process industries to achieve intense heating, cooling or drying rates and also widely employed as a test flow for turbulent models due to its complex flow configuration, on a flat plate by numerical methods. In this calculation, the finite volume method was employed to solve the Navier-stokes equation based on the non-orthogonal coordinate with non-staggered variable arrangement. To get a better understanding for the fluid flow and heat transfer characteristics of the turbulent jet impingements, $k-{\varepsilon}-{\overline{v^{'2}}}$ turbulent model was adapted and compared with the experimental data and the result of standard $k-{\varepsilon}$ turbulent model. Numerical calculations were carried out with various flow rates, nozzle to plate distances. In the case of the axisymmetric jet impingement on a flat plate, $k-{\varepsilon}-{\overline{v^{'2}}}$ turbulent model showed better agreement with the experimental data than the standard $k-{\varepsilon}$ turbulent model in the prediction of the mean velocity profiles, the turbulent velocity profiles. the turbulent shear stress and the heat transfer rate. The highest heat transfer rate can be obtained when the impingement occurs within the potential core..




  1. Gardon, R. and Akfirat, J. C., 1966, 'Heat Transfer Characteristics of Impinging Two-Dimension Air Jets,' ASME J. of Heat Transfer, pp. 101-108
  2. Giralt, F. and Chia, C. J., 1977, 'Characterization of the Impingement Region in an Axisymmetry Turbulent Jet,' Ind. Eng. Chem. Fundam., Vol. 16, pp. 21-28 https://doi.org/10.1021/i160061a007
  3. Craft, T. J., Graham, L. J. W. and Launder, B. E., 1993, 'Impinging Jet Studies for Turbulence Model Assessment - II. An Examination of the Performance of Four Turbulence Models,' Int. J. Heat Mass Transfer, Vol. 36, No. 10, pp. 2685-2697 https://doi.org/10.1016/S0017-9310(05)80205-4
  4. Cooper, D., Jackson, D. C., Launder, B. E. and Liao, G. X., 1993, 'Impinging Jet Studies for Turbulence Model Assessment - I. Flow-Field Experiments,' Int. J. Heat Mass Transfer, Vol. 36, No. 10, pp. 2675-2684 https://doi.org/10.1016/S0017-9310(05)80204-2
  5. Jambunathan, K., Lai, E. Moss, M. A. and Button, B. L., 1992, 'A Review of Heat Transfer Data for Single Circular Jet Impingement,' Int. J. Heat and Fluid Flow, Vol. 13, No.2, pp. 106-115 https://doi.org/10.1016/0142-727X(92)90017-4
  6. Huang, L., EI-Genk, M. S., 1994, 'Heat Transfer of An Impinging Jet on A Flat Surface,' Int. J. of Heat Mass Transfer, Vol. 37, No. 13, pp. 1915-1923 https://doi.org/10.1016/0017-9310(94)90331-X
  7. Lee, S. J., Lee, J. H., and Lee, D. H., 1994, 'Local Heat Transfer Measurements From an Elliptic Jet Impinging on a Flat Plate Using Liquid Crystal,' Int. J. of Heat Mass Transfer, Vol. 37, No.6, pp. 967-976 https://doi.org/10.1016/0017-9310(94)90221-6
  8. Durbin, P. A., 1991, 'Near-wall Turbulence Closure Modeling Without 'Damping Functions,' Theoretical and Computational Fluid Dynamics, Vol. 3, No. 1, pp. 1-13 https://doi.org/10.1007/BF00271513
  9. Rhie, C. M., 1981, 'A Numerical Study of The Flow past an Isolated Airfoil with Separation,' Ph. D. Thesis, Dept. of Mech., Univ. of Illinois at Urbana-Champagn
  10. Kim, J., and Moin, P, and Moser, R., 1987, 'Turbulent Statistics in Fully Developed Channel Flow at Low Reynolds Number,' J. Fluid Mech., Vol. 177, pp. 133-166 https://doi.org/10.1017/S0022112087000892