Evaluation of parameterizations for pollutant transport and dispersion in an urban street canyon using a three-dimensional dynamic flow model

Conference · Wed Jun 01 04:00:00 EDT 1994

OSTI ID:10155121

Lee, I Y; Shannon, J D ^[1]; Park, H M ^[2]

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1. Argonne National Lab., IL (United States)
2. Sogang Univ., Seoul (Korea, Republic of). Dept., of Chemical Engineering

Results produced from a 3-D, time-dependent flow model show that dispersion characteristics can be simulated and interpreted in terms of flow conditions and structural configurations. Our previously parameterized 2-D formulations for time constants are modified to include the effect of the orientation of the mean wind relative to the canyon. The parameterizations can be applied to urban air pollution models directly, because the independent parameters are readily available from mesoscale calculations. More numerical studies are planned to characterize turbulent flow in street canyons. The current version of the model will be coupled with an improved module to solve transport equations for turbulence kinetic energy and turbulence dissipation rate. A three-dimensional, time-dependent flow model has been applied to examine the processes by which pollutants emitted at street level are transported and diffused from street canyons, and to determine the exchange rates of pollutants between street canyons and the air above the canyon.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10155121
• Report Number(s): ANL/ER/CP--81934; CONF-940632--17; ON: DE94012641
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120
99 GENERAL AND MISCELLANEOUS
990200
AIR QUALITY
CHEMICALS MONITORING AND TRANSPORT
ENVIRONMENTAL TRANSPORT
EXHAUST GASES
FLOW MODELS
MATHEMATICAL MODELS
MATHEMATICS AND COMPUTERS
THREE-DIMENSIONAL CALCULATIONS
TIME DEPENDENCE
URBAN AREAS