Publication detail

PM Dispersion Around a Heavily Trafficked Street Canyon and Neighbouring Streets - Computational Modeling and Comparison With Measurements

POSPÍŠIL, J. JÍCHA, M.

Original Title

PM Dispersion Around a Heavily Trafficked Street Canyon and Neighbouring Streets - Computational Modeling and Comparison With Measurements

English Title

PM Dispersion Around a Heavily Trafficked Street Canyon and Neighbouring Streets - Computational Modeling and Comparison With Measurements

Type

conference paper

Language

en

Original Abstract

In this paper authors compare different ways of PM dispersion modeling in urban areas. The study is focused on dispersion of particulate matter originating from traffic. CFD code StarCD has been used as appropriate tool that is capable of correct velocity field prediction at small-scale numerical models. Different options of CFD technique and different approaches were tested. The numerical predictions were compared with measurement carried out in a heavily built up urban area. The computational model represents part of the area in the center of the city of Brno. The solution domain involves an area of approximately 0.5 x 0.5 km and includes one long street canyon, Kotlarska street, together with four streets that cross the main street canyon. Boundary condition for wind speed assumes specified wind speed in the horizontal layer where it was measured. Sidewalls of the solution domain are prescribed with pressure boundary conditions. The top of the domain uses condition of a slip wall. As a model of turbulence, k-? The RNG model was used. To simulate traffic, an original model developed previously by the authors is used that takes into account traffic density, speed of cars and number of traffic lanes. PMs are assumed spherical with a density of 300 kg/m3. Only PM10 are modeled that also were measured in several locations within the street canyon and crossing streets, both at the ground level.

English abstract

In this paper authors compare different ways of PM dispersion modeling in urban areas. The study is focused on dispersion of particulate matter originating from traffic. CFD code StarCD has been used as appropriate tool that is capable of correct velocity field prediction at small-scale numerical models. Different options of CFD technique and different approaches were tested. The numerical predictions were compared with measurement carried out in a heavily built up urban area. The computational model represents part of the area in the center of the city of Brno. The solution domain involves an area of approximately 0.5 x 0.5 km and includes one long street canyon, Kotlarska street, together with four streets that cross the main street canyon. Boundary condition for wind speed assumes specified wind speed in the horizontal layer where it was measured. Sidewalls of the solution domain are prescribed with pressure boundary conditions. The top of the domain uses condition of a slip wall. As a model of turbulence, k-? The RNG model was used. To simulate traffic, an original model developed previously by the authors is used that takes into account traffic density, speed of cars and number of traffic lanes. PMs are assumed spherical with a density of 300 kg/m3. Only PM10 are modeled that also were measured in several locations within the street canyon and crossing streets, both at the ground level.

RIV year

2005

Released

01.01.2005

Publisher

Verlag TU Graz

Location

Garmisch-Partenkitchen

ISBN

3-902465-16-6

Book

14th Symposium Transport and Air Pollution

Pages from

309

Pages to

317

Pages count

9

BibTex


@inproceedings{BUT18157,
  author="Jiří {Pospíšil} and Miroslav {Jícha}",
  title="PM Dispersion Around a Heavily Trafficked Street Canyon and Neighbouring Streets - Computational Modeling and Comparison With Measurements",
  annote="In this paper authors compare different ways of PM dispersion modeling in urban areas. The study is focused on dispersion of particulate matter originating from traffic. CFD code StarCD has been used as appropriate tool that is capable of correct velocity field prediction at small-scale numerical models. Different options of CFD technique and different approaches were tested. The numerical predictions were compared with measurement carried out in a heavily built up urban area.
The computational model represents part of the area in the center of the city of Brno. The solution domain involves an area of approximately 0.5 x 0.5 km and includes one long street canyon, Kotlarska street, together with four streets that cross the main street canyon. Boundary condition for wind speed assumes specified wind speed in the horizontal layer where it was measured. Sidewalls of the solution domain are prescribed with pressure boundary conditions. The top of the domain uses condition of a slip wall. As a model of turbulence, k-? The RNG model was used. To simulate traffic, an original model developed previously by the authors is used that takes into account traffic density, speed of cars and number of traffic lanes.
PMs are assumed spherical with a density of 300 kg/m3. Only PM10 are modeled that also were measured in several locations within the street canyon and crossing streets, both at the ground level.",
  address="Verlag TU Graz",
  booktitle="14th Symposium Transport and Air Pollution",
  chapter="18157",
  institution="Verlag TU Graz",
  year="2005",
  month="january",
  pages="309--317",
  publisher="Verlag TU Graz",
  type="conference paper"
}