Atmosphere (대기)

Korean Meteorological Society (한국기상학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of an Apartment Complex on Flow and Dispersion in an Urban Area

도시 지역에서 아파트 단지가 흐름과 확산에 미치는 영향

  • Lee, Young-Su (Department of Environmental Atmospheric Sciences, Pukyong University) ;
  • Kim, Jae-Jin (Department of Environmental Atmospheric Sciences, Pukyong University)
  • 이영수 (부경대학교 환경대기과학과) ;
  • 김재진 (부경대학교 환경대기과학과)
  • Received : 2011.01.13
  • Accepted : 2011.02.01
  • Published : 2011.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

The effects of an apartment complex on flow and pollutant dispersion in an urban area are numerically investigated using a computational fluid dynamics (CFD) model. The CFD model is based on the Reynolds-averaged Navier-Stokes equations and includes the renormalization group k-${\varepsilon}$ turbulence model. The geographic information system (GIS) data is used as an input data of the CFD model. Eight numerical simulations are carried out for different inflow directions and, for each inflow direction, the effects of an apartment complex are investigated, comparing the characteristics of flow and dispersion before and after construction of the apartment complex in detail. The observation data of automatic weather system (AWS) is analyzed. The windrose analysis shows that the wind speed and direction after the construction of the complex are quite different from those before the construction. The construction of the apartment complex resulted in the decrease in wind speed at the downwind region. It is also shown that the wind speed increased partially inside the apartment complex due to the channeling effect to satisfy the mass continuity. On the whole, the wind speed decreased at the downwind region due to the drag effect by the apartment complex. As a result, the passive pollutant concentration increased (decreased) near the downwind region of (within) the apartment complex compared with that before the construction.

Keywords

References

  1. 김재진, 백종진, 2005: CFD 모형을 이용한 도시 도로 협곡에서의 흐름 및 스칼라 분산 연구. 한국기상학회지, 41, 821-837.
  2. 김재진, 2007: 장애물 외관비가 주변 흐름에 미치는 영향. 대기, 17, 381-391.
  3. 이주현, 최재원, 김재진, 서용철, 2009: 도시 재개발이 도시지역 상세 대기 흐름에 미치는 영향. 한국지리정보학회지, 12, 69-81.
  4. Baik, J.-J., and J.-J. Kim, 1999: A numerical study of flow and pollutant dispersion characteristics in urban street canyons. J. Appl. Meteor., 38, 1576-1589. https://doi.org/10.1175/1520-0450(1999)038<1576:ANSOFA>2.0.CO;2
  5. Baik, J.-J., R.-S. Park, H.-Y. Chun, and J.-J. Kim, 2000: A laboratory model of urban street-canyon flows. J. Appl. Meteor., 39, 1592-1600. https://doi.org/10.1175/1520-0450(2000)039<1592:ALMOUS>2.0.CO;2
  6. Baik, J.-J., S.-B. Park, and J.-J. Kim, 2009: Urban flow and dispersion simulation using a CFD model coupled to a mesoscale model. J. Appl. Meteor. Climatol., 48, 1667-1681. https://doi.org/10.1175/2009JAMC2066.1
  7. Castro, I. P., and D.D. Apsley, 1997: Flow and dispersion over topography: a comparison between numerical and laboratory data for two-dimensional flow. Atmos. Environ., 31, 893-850.
  8. Cheng, X., and F. Hu, 2005: Numerical studies on flow fields around buildings in an urban street canyon and cross-road. Adv. Atmos. Sci., 22, 290-299. https://doi.org/10.1007/BF02918518
  9. DePaul F.T., and C.M. Sheih, 1986: Measurements of wind velocities in a street canyon. Atmos. Environ., 20, 455-459. https://doi.org/10.1016/0004-6981(86)90085-5
  10. Kim J.-J., and J.-J. Baik, 1999: A numerical study of thermal effects on flow and pollutant dispersion in urban street canyons. J. Appl. Meteor., 38, 1249-1261. https://doi.org/10.1175/1520-0450(1999)038<1249:ANSOTE>2.0.CO;2
  11. Kim J.-J., and J.-J. Baik, 2001: Urban street-canyon flows with bottom heating. Atmos. Environ., 35, 3395-3404. https://doi.org/10.1016/S1352-2310(01)00135-2
  12. Kim J.-J., and J.-J. Baik, 2005: Physical experiments to investigate urban street-canyon flow. Adv. Atmos. Sci., 22, 230-237. https://doi.org/10.1007/BF02918512
  13. Lee I. Y., and H.M. Park, 1994: Parameterization of the pollutant transport and dispersion in urban street canyons. Atmos. Environ., 28, 2343-2349. https://doi.org/10.1016/1352-2310(94)90488-X
  14. Liu, C.-H., and M.C. Barth, 2002: Large-eddy simulation of flow and scalar transport in a modeled street canyon. J. Appl. Meteor., 41, 660-673. https://doi.org/10.1175/1520-0450(2002)041<0660:LESOFA>2.0.CO;2
  15. Meroney R.N., M. Pavageau, S. Rafailidis, and M. Schatzmann, 1996: Study of line source characteristics for 2-D physical modeling of pollutant dispersion in street canyon. J. Wind Eng. Ind. Aerodyn., 62, 37-56. https://doi.org/10.1016/S0167-6105(96)00057-8
  16. Nakamura Y., and T.R. Oke, 1988: Wind, temperature, and stability conditions in an east-west oriented urban canyon. Atmos. Environ., 22, 2691-2700. https://doi.org/10.1016/0004-6981(88)90437-4
  17. Rotach M.W., 1995: Profiles of turbulence statistics in and above an urban street canyon. Atmos. Environ., 29, 1473-1486. https://doi.org/10.1016/1352-2310(95)00084-C
  18. Sini, J.-F., S. Anquetin, and P.G. Mestayer, 1996: Pollutant dispersion and thermal effects in urban street canyons. Atmos. Environ., 30, 2659-2677. https://doi.org/10.1016/1352-2310(95)00321-5