한국대기환경학회지 (Journal of Korean Society for Atmospheric Environment)

  • 제21권5호
  • /
  • Pages.525-535
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  • 2005
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  • 1598-7132(pISSN)
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  • 2383-5346(eISSN)
한국대기환경학회 (Korean Society for Atmospheric Environment)
권호 표지

CFD 모형을 이용한 도시 도로 협곡에서의 흐름 체계 분류

Classification of Flow Regimes in Urban Street Canyons Using a CFD Model

  • 김재진 (서울대학교 기후환경시스템연구센터) ;
  • 백종진 (서울대학교 지구환경과학부)
  • Kim, Jae-Jin (Climate Environment System Research Center, Seoul National University) ;
  • Baik, Jong-Jin (School of Earth and Environmental Sciences, Seoul National University)
  • 발행 : 2005.10.01
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초록

Using a three-dimensional computational fluid dynamics (CFD) model with the $k-{\varepsilon}$ turbulence closure scheme based on the renormalization group theory, flow regimes in urban street canyons are classified according to the building and street aspect ratios. The transition between skimming flow (SF) and wake interference flow (WIF) is determined with the size of double-eddy circulation generated behind the upwind building. The transition between WIF and isolated roughness flow (IRF) is determined with the flow reattachment distance from the upwind building. The critical aspect ratios at which the flow transition occurs are found and compared with those in previous studies. The results show that the flow-regime classification method used in this study is quite reasonable and that the values of the critical aspect ratios are generally consistent with those in fluid experiments or large-eddy simulation. The regression equation describing a relation between the building and street aspect ratios at the flow-regime transition is presented.

키워드

참고문헌

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