Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
권호 표지

A Lagrangian Stochastic Model for Dense Gas Dispersion in the Neutrally-stratified Atmospheric Surface Layer

이상적인 중립 대기경계층에서 고밀도가스의 확산예측을 위한 라그랑지안 확률모델

  • Kim, Byung-Gu (Department of Mechanical Engineering, Yonsei University) ;
  • Lee, Changhoon (Department of Mechanical Engineering, Yonsei University)
  • 김병구 (연세대학교 기계공학과) ;
  • 이창훈 (연세대학교 기계공학과)
  • Published : 2005.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

A new dispersion model for dense gas is constructed in the Lagrangian framework. Prediction of concentration by the proposed model is compared with measure data obtained in the experiment conducted in Thorney Island in 1984. Two major effects of dense gas dispersion, gravity slumping and stratification effect, are successfully incorporated into LDM (Lagrangian dense gas model). Entrainment effect is naturally modelled by introducing stochastic dispersion model with the effect of turbulence suppression by stratification. Not only various releasing conditions but also complex terrain can be extended to, although proposed model is appropriate for flat terrain.

Keywords

References

  1. 구윤서(1999) 라그란지안 입자 확산모델개발(농도 계산방법의 검토), 한국대기환경학회지, 15(6), 757-765
  2. 김석철(2003) 이상적인 중립 대기경계층에서 라그랑지안 단일이자 모델의 평가, 한국대기환경학회지, 9(4), 397-414
  3. 김아름, 구윤서, 윤희영(2002) Dense gas의 대기 확산 모델링, 한국대기환경학회 2002 추계학술대회 논문집, 393-394
  4. Blackardar, A.K. (1997) Turbulence and Diffusion in the Atmosphere, Springer-Verlag, Germany, 29 pp
  5. Briggs, G.A., R.E. Britter, S.R. Hanna, J.A. Havens, A.G. Robins, and W.H. Snyder (2001) Dense Gas Vertical Diffusion Over Rough Surfaces: Result of Windtunnel Studies. Atmospheric Environment 35, 2265-2284 https://doi.org/10.1016/S1352-2310(00)00360-5
  6. Brighton, P.W.M. (1987) A User's Critique of the Thorney Island Dataset. Journal of Hazardous Materials. 16, 457-500 https://doi.org/10.1016/0304-3894(87)80048-1
  7. Britter, R.E. (1989) Atmohpheric Dispersion of Dense Gases. Ann. Rev. Fluid Mech. 21, 3 17-344 https://doi.org/10.1146/annurev.fl.21.010189.001533
  8. Caughey, S.J., J.C. Wyngaard, and J.C., Kaimal (1979) Turbulence in the Evolving Stable Boundary Layer. Journal of the Atmospheric Sciences 35, 1041-1052
  9. Deaves, D.M. (1983) Application of Advanced Turbulence Models in Determining the Structure and Dispersion of Heavy Gas Clouds, IUTAM Syrnposiurn on Atmospheric Dispersion of Heavy Gases and Small particles, Deft, Netherlands
  10. Gibson, M.M. and B.E. Launder (1978) Ground effect on pressure fluctuations in the atmospheric boundary layer. 86, 491-511
  11. Gopalakrishnan, S.G. and M. Sharan (1997) A Lagrangian Particle Model for Marginally Heavy Gas Dispersion. Atmospheric Environment. 31, 3369-3382 https://doi.org/10.1016/S1352-2310(97)00145-3
  12. Hanna, S.R. and J.C. Chang (2001) Use of the Kit Fox Field Data to Analyze Dense Gas Dispersion Modeling Issues. Atmospheric Environment 35, 223 1-2242 https://doi.org/10.1016/S1352-2310(00)00200-4
  13. Hanna, S.R., D.G. Strimaitis, and J.C. Chang (1991) Hazard response modelling Uncertainty (A Quantitative Method), Vol. II; Evaluation of commonly -used hazardous gas dispersion rnodels. Sigma Research Corporation, U.S.A
  14. Hunt, J.C.R., J.W. Rottman, and R.E. Britter(1983) Some Physical Process Involved in the Dispersion of Dense Gases, IUTAM Symposium on Atmospheric Dispersion of Heavy Gases and Small particles, Deft, Netherlands
  15. Hurley, P. (1994) PARTPUFF-A Lagrangian Particle-Puff Approach for Plume Dispersion Modeling Applications. Journal of Applied Meteorology 33, 285-294 https://doi.org/10.1175/1520-0450(1994)033<0285:PLPPAF>2.0.CO;2
  16. McQuaid, J. (1983) Large Scale Experiments on the Dispersion of Heavy Gas Clouds, IUTAM Symposium on Atmospheric Dispersion of Heavy Gases and Small particles, Deft, Netherlands
  17. Mohan, M., T.S. Panwar, and M.P. Singh (1995) Development of Dense Gas Dispersion Model for Emergency Preparedness. Atmospheric Environment 29, 2075 -2087 https://doi.org/10.1016/1352-2310(94)00244-F
  18. Ohya, Y. (2001) Wind-Tunnel Study of Atmospheric Stable Boundary Layers Over a Rough Surface. Boundary-Layer Meteorology 98,57-82 https://doi.org/10.1023/A:1018767829067
  19. Ohya, Y., D.E. Neff, and R.N. Meroney (1997) Turbulence Structure in a Stratified Boundary Layer Under Stable Conditions. Boundary-Layer Meteorology 83, 139-161 https://doi.org/10.1023/A:1000205523873
  20. Puttock, J.S. (1986) A Model for Gravity-Dominated Dispersion of Dense-Gas Clouds, IMA Symposiurn on Stably Stratified Flow and Dense Gus Dispersion, Chester, England
  21. Puttock, J.S. (1987a) Comparison of Thorney Island Data with Predictions of Hegabox/Hegadas. Journal of Hazardous Materials 16, 439-455 https://doi.org/10.1016/0304-3894(87)80047-X
  22. Puttock, J.S. (1987b) Analysis of Meteorological Data for the Thorney Island Phase Trials. Journal of Hazardous Materials 16, 43-74 https://doi.org/10.1016/0304-3894(87)80027-4
  23. Snyder, W.H. (2001) Wind-Tunnel Study of Entrainment in Two-dimensional Dense-gas Plumes at the EPA's Fluid Modeling Facility. Atmospheric Environment 35, 2285-2304 https://doi.org/10.1016/S1352-2310(00)00214-4
  24. Thomson, D.J. (1987) Criteria for the selection of stochastic models of particle trajectories in turbulent flows. J. Fluid Mech. 180, 529-556 https://doi.org/10.1017/S0022112087001940
  25. Zannetti, P. (1990) Air Pollution Modeling, Van Nostrand Reinhold, U.S.A., 63 pp
  26. Zhu, G., S.P. Arya, and W.H. Snyder (1998) An experimental study of the flow structure within a dense gas plume. Journal of Hazardous Materials 62, 161-186 https://doi.org/10.1016/S0304-3894(98)00162-9