Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Numerical Analysis of the Two-Dimensional Pollutant Dispersion Over Hilly Terrain

산지 내 오염물질 확산의 2차원 수치해석

  • 김현구 (포항공과대학교 첨단유체공학연구센터) ;
  • 이정묵 (포항공과대학교 첨단유체공학연구센터)
  • Published : 1997.10.01
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Abstract

Numerical prediction of the pollutant dispersion over a two-dimensional hilly terrain is presented. The dispersion model used in the present work is based on the gradient diffusion theory and the finite-volume method on a non-orthogonal boundary-fitted grid system. The numerical model is validated by comparing the results with the available experimental data for the flat-floor dispersion within a turbulent boundary-layer. The numerical error analysis is performed based on the guideline of Kasibhatla et al.(1988) for the elevated-source dispersion in the flat-floor boundary layer having a power-law velocity and linear eddy-diffusivity profile. The influences of the two-dimensional hilly terrain on the dispersion from a continuously released source are numerically investigated by changing the emission locations and heights. It is found that the distributions of ground-level concentration are strongly influenced by the source location and the emission height. Hence, the terrain amplification factor is greatly enhanced when the pollutant source is located within a flow separation region. Dispersion from a source of short duration is also simulated and the duration time of the pollutant is compared at several downstream locations on a hilly terrain. The results of the numerical prediction are applied to the evaluation of environmental impacts due to the automobile exhausts at the seashore highway with a parallel mountain range.

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References

  1. 한국대기보전학회지 v.13 언덕지형을 지나는 유동의 수치해석적 연구 김현구;이정묵;경남호
  2. 한국대기보전학회지 v.11 오일러리안 모델 심상규
  3. 한국대기보전학회지 v.11 우리나라에 적합한 국지확산모델의 개발방향 이종범
  4. 한국대기보전학회지 v.12 언덕지형을 지나는 유동에 관한 연구 임희창;김현구;이정묵;경남호
  5. 산본소각장 가동시 대형재난, 3월 9일자 한겨례신문
  6. Atmos. Environ. v.15 An experimental investigation of flow and diffusion in the disturbed boundary layer over a ridge: Ⅱ. Diffusion from a continuous point source Arya, S.P.S.;M.S. Shipman;L.Y. Courtney
  7. Atmos. Environ. v.21 Some fluid modeling studies of flow and dispersion over two-dimensional low hills Arya, S.P.S.;M.E. Capuano;L.C. Fagen
  8. Boundary Layer Meteorol. v.66 A wind tunnel study of mean and fluctuating concentrations in a plume dispersion over a two-dimensional hill Crooks, G.;S. Ramsay
  9. J. Fluid Mech. v.117 Concentration fluctuations and fluxes in plumes from point sources in a turbulent boundary layer Fackrell, J.E.;A.G. Robins
  10. Boundary-Layer Meteorol. v.37 A modified turbulent energy model for diffusion from elevated and ground point sources in neutral boundary layer Galperin, G.
  11. Boundary-Layer Meteorol. v.54 A wind tunnel study of turbulent dispersion over two- and three- dimensional gentle hills from upwind point sources in neutral flow Gong, W.
  12. Int. J. Num. Methods in Fluids v.19 Dispersion under neutral atmospheric conditions Glekas, J.;G. Bergeles
  13. Atmos. Environ. v.17 Turbulent Schmidt number for diffusion models in the neutral boundary layer Hassid, S.
  14. Atmos. Environ. v.13 A theory of dispersion in turbulent shear flow Huang, C.H.
  15. Atmos. Environ. v.17 Analysis of the error associated with grid representation of point sources Karamchandani, P.;L.K., Peters
  16. Atmos. Environ. v.22 Numerical simulation of transport from an infinite line source: Error analysis Kasibhatla, P.S.;L.K. Peters;G. Fairweather
  17. Ph. D. Thesis, Helsinki Univ. Numerical determination of the flow of an arbitrary mixture of gases Kaurinkoski, P.
  18. Earth, Moon and Planets v.72 Turbulent dispersion of pollutant over complex terrain Ma, J.;R.E. Robson
  19. Int.J.Num. Methods Fluids v.12 Numerical prediction of turbulent flow over a two-dimensional ridge Mouzakis, F.N.;G.C. Bergeles
  20. Atmos. Environ. v.24A Wind tunnel experiment of gas diffusion in stably stratified flow over a complex terrain Ohba, R.;N. Ukeguchi;S. Kakishima;B. Lamb
  21. Numerical heat transfer and fluid flow Patankar, S.V.
  22. Air Pollution Perkins, H.C.
  23. Int. J. Heat Mass Transfer v.7 Study of diffusion from a line source in a turbulent boundary layer Poreh, M.;J. E. Cermak
  24. J. Fluid Mech. v.136 Turbulent dispersion from an elevated line source: Measurements of wind-concentration moments and budgets Raupach, M.R.;B.J. Legg
  25. Trans. Amer. Geophys. Union v.36 Solutions of the two-dimensional diffusion equations Rounds, W.
  26. Atmos. Environ. v.25A Flow and dispersion of pollutants within two-dimensional valleys Snyder, W.H.;L.H. Khurshudyan;I.V. Nekrasov;R.E. Lawson;R.S. Thompson
  27. SIAM J. Numer. Anal. v.5 Iterative solution of implicit approximations of multi-dimensional partial differential equations Stone, H.L.
  28. Guideline on air quality models(Revised), EPA-450/2-78-027R. U.S. EPA