Journal of Mechanical Science and Technology

  • 제17권7호
  • /
  • Pages.1054-1062
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  • 2003
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

Numerical Analysis of Flow and Pollutant Dispersion over 2-D Bell Shaped Hills

  • Jung, Young-Rae (School of Mechanical Engineering, Pusan National University) ;
  • Park, Keun (School of Mechanical Engineering, Pusan National University) ;
  • Park, Warn-Gyu (School of Mechanical Engineering, Pusan National University) ;
  • Park, Ok-Hyun (Department of Environmental Engineering, Pusan National University)
  • 발행 : 2003.07.01
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초록

The numerical simulations of flow and pollutant particle dispersion are described for two-dimensional bell shaped hills with various aspect ratios. The Reynolds-averaged incompressible Navier-Stokes equations with low Reynolds number $\kappa$-$\varepsilon$ turbulent model are used to simulate the flowfield. The gradient diffusion equation is used to solve the pollutant dispersion field. The code was validated by comparison of velocity, turbulent kinetic energy, Reynolds shear stress, speed-up ratio, and ground level concentration with experimental and numerical data. Good agreement has been achieved and it has been found that the pollutant dispersion pattern and ground level concentration have been strongly influenced by the hill shape and aspect ratio, as well as the location and height of the source.

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참고문헌

  1. Arya, S.P.S., Capuano, M.E. and Fagen, L.C., 1987, 'Some Fluid Modeling Studies of Flow and Dispersion over Two-Dimensional Low Hills,' Atmospheric Environment, Vol. 21, No. 4, pp. 753-764 https://doi.org/10.1016/0004-6981(87)90071-0
  2. Castro, I.P. and Apsley, D.D., 1997, 'Flow and Dispersion over Topography : A Comparison Between Numerical and Laboratory Data for Two-Dimensional Flows,' Atmospheric Environment, Vol. 31, No. 6, pp. 839-850 https://doi.org/10.1016/S1352-2310(96)00248-8
  3. Chien, K.Y., 1982, 'Prediction of Channel and Boundary-Layer Flows with a Low-Reynolds Number Turbulent Model,' AIAA Journal, Vol. 20, No. 1, pp. 33-38 https://doi.org/10.2514/3.51043
  4. Dyer, A.J., 1974, 'A Review of Flux-profile Relationships,' Boundary-Layer Meteorology, Vol. 7 https://doi.org/10.1007/BF00240838
  5. Gaskell, P.H. and Lau, A.K.C., 1988, 'Curvature-Compensated Convective Transport : SMART, a New Boundedness-Preserving Transport,' International Journal for Numerical Methods in Fluids, Vol. 8, pp. 617-641 https://doi.org/10.1002/fld.1650080602
  6. Gong, W. and Ibbeston, A., 1989, 'A Wind Tunnel Study of Turbulent Flow over Model Hills,' Boundary-Layer Meteorology, Vol. 49, pp. 113-148 https://doi.org/10.1007/BF00116408
  7. Gong, W., 1991, 'A Wind Tunnel Study of Turbulent Dispersion over Two- and Three- Dimensional Gentle Hills from Upwind Point Sources in Neutral Flow,' Boundary-Layer Meteorology, Vol. 54, pp. 211-230 https://doi.org/10.1007/BF00183954
  8. Kim, H.G., Lee, C.M., Lim, H.C. and Kyong, N.H., 1997a, 'An Experimental and Numerical Study on the Flow over Two-dimensional Hills,' Journal of Wind Engineering and Industrial Aerodynamics, Vol. 66, pp. 17-33 https://doi.org/10.1016/S0167-6105(97)00007-X
  9. Kim, H.G. and Lee, C.M., 1997b, 'Numerical Analysis of the Two-Dimensional Pollutant Dispersion Over Hilly Terrian,' Journal of Korea Air Pollution Research Association, Vol. 13, No. 5, pp. 383-396 (in Korean)
  10. Park, W.G. and Sankar, L.N., 1991, 'An Iterative Time Marching Procedure for Unsteady Viscous Flows,' ASME-BED, Vol. 20, pp. 281-284
  11. Park, W.G. and Sankar, L.N., 1993, 'A Technique for the Prediction of Unsteady Incompressible Viscous Flows,' AIAA Paper 93-3006
  12. Raupach, M.R. and Legg, B.J., 1983, 'Turbulent Dispersion from an Elevated Line Source : Measurement of Wind-Concentration Moments and Budgets,' Journal of Fluid Mechanics, Vol. 136, pp. 11-137 https://doi.org/10.1017/S0022112083002086
  13. Robert, P.T., Fryer-Taylor, R.E.J., 1994, 'Wind Tunnel Studies of Roughness Effects in Gas Dispersion,' Atmospheric Environments, Vol. 28, No. 11, pp. 1861-1870 https://doi.org/10.1016/1352-2310(94)90325-5