Publication detail
Pollution dispersion in street canyon under traffic induced flow and turbulence
KATOLICKÝ, J. JÍCHA, M. POSPÍŠIL, J.
Czech title
Pollution dispersion in street canyon under traffic induced flow and turbulence
English title
Pollution dispersion in street canyon under traffic induced flow and turbulence
Type
conference paper
Language
en
Original abstract
The paper deals with a computational model for traffic induced flow field and turbulence in a 3D street canyon. An Eulerian-Lagrangean model developed is presented that accounts for moving vehicles in several combinations of traffic lanes, one- or two-way traffic and different traffic rates. Moving vehicles are treated as a discrete phase using Particle-Source-In-Cell method. A Lagrangean momentum equation is solved for moving vehicles and additional momentum source is calculated for the momentum of continuos phase of ambiant air. Also several formulas for traffic induced turbulence are tested to show the influence on the flow field entrained into the street canyon. The street canyon is defined with an aspect ratio of W/H=1.27. As the results the velocity field in the mid-cross section of the canyon is presented showing the influence of traffic rate and one- or two-way traffic in two or four lanes.
Czech abstract
The paper deals with a computational model for traffic induced flow field and turbulence in a 3D street canyon. An Eulerian-Lagrangean model developed is presented that accounts for moving vehicles in several combinations of traffic lanes, one- or two-way traffic and different traffic rates. Moving vehicles are treated as a discrete phase using Particle-Source-In-Cell method. A Lagrangean momentum equation is solved for moving vehicles and additional momentum source is calculated for the momentum of continuos phase of ambiant air. Also several formulas for traffic induced turbulence are tested to show the influence on the flow field entrained into the street canyon. The street canyon is defined with an aspect ratio of W/H=1.27. As the results the velocity field in the mid-cross section of the canyon is presented showing the influence of traffic rate and one- or two-way traffic in two or four lanes.
English abstract
The paper deals with a computational model for traffic induced flow field and turbulence in a 3D street canyon. An Eulerian-Lagrangean model developed is presented that accounts for moving vehicles in several combinations of traffic lanes, one- or two-way traffic and different traffic rates. Moving vehicles are treated as a discrete phase using Particle-Source-In-Cell method. A Lagrangean momentum equation is solved for moving vehicles and additional momentum source is calculated for the momentum of continuos phase of ambiant air. Also several formulas for traffic induced turbulence are tested to show the influence on the flow field entrained into the street canyon. The street canyon is defined with an aspect ratio of W/H=1.27. As the results the velocity field in the mid-cross section of the canyon is presented showing the influence of traffic rate and one- or two-way traffic in two or four lanes.
Keywords in English
street canyon, pollution dispersion
RIV year
1999
Released
03.03.1999
Publisher
Institute of Physics, London
Location
Madrid, Spain
Book
2nd International Conference Urban Air Quality
Pages count
2
BIBTEX
@inproceedings{BUT133,
author="Jaroslav {Katolický} and Miroslav {Jícha} and Jiří {Pospíšil},
title="Pollution dispersion in street canyon under traffic induced flow and turbulence",
booktitle="2nd International Conference Urban Air Quality",
year="1999",
month="March",
publisher="Institute of Physics, London",
address="Madrid, Spain"
}