Publication detail

COMPARISON OF DIFFERENT TURBULENCE MODELS APPLIED TO MODELLING OF AIRFLOW IN URBAN STREET CANYON AND COMPARISON WITH MEASUREMENTS

POSPÍŠIL, J. JÍCHA, M.

Original Title

COMPARISON OF DIFFERENT TURBULENCE MODELS APPLIED TO MODELLING OF AIRFLOW IN URBAN STREET CANYON AND COMPARISON WITH MEASUREMENTS

English Title

COMPARISON OF DIFFERENT TURBULENCE MODELS APPLIED TO MODELLING OF AIRFLOW IN URBAN STREET CANYON AND COMPARISON WITH MEASUREMENTS

Type

conference paper

Language

en

Original Abstract

The CFD code StarCD was used for airflow modeling in an urban street canyon. A numerical model of a calculated area involves not only the studied street canyon but also surrounding buildings. Series of calculations were done for three different wind directions, namely longitudinal, perpendicular and oblique wind direction. The wind direction orientation is related to the longitudinal axis of the studied street canyon. Velocity fields were solved for wind velocities 3 m/s and 6 m/s as obtained from the measurements at height 25 m above ground level. In total, three different turbulence models were tested. As a first one, K- Hi-Re model was used as the most common model used in CFD. As a second, K- RNG model of turbulence was taken into account. From different studies it follows that this model provides good results of air flow in urban areas. Third, the K- Lo-Re model of turbulence (Lien, F.S., Chen, W.L., and Leschziner, M.A., 1996) was used. Three different wind directions and two different wind velocities were tested with all models of turbulence.

English abstract

The CFD code StarCD was used for airflow modeling in an urban street canyon. A numerical model of a calculated area involves not only the studied street canyon but also surrounding buildings. Series of calculations were done for three different wind directions, namely longitudinal, perpendicular and oblique wind direction. The wind direction orientation is related to the longitudinal axis of the studied street canyon. Velocity fields were solved for wind velocities 3 m/s and 6 m/s as obtained from the measurements at height 25 m above ground level. In total, three different turbulence models were tested. As a first one, K- Hi-Re model was used as the most common model used in CFD. As a second, K- RNG model of turbulence was taken into account. From different studies it follows that this model provides good results of air flow in urban areas. Third, the K- Lo-Re model of turbulence (Lien, F.S., Chen, W.L., and Leschziner, M.A., 1996) was used. Three different wind directions and two different wind velocities were tested with all models of turbulence.

Keywords

CFD modeling, air flow, street canyon

Released

01.10.2004

Publisher

University of Calgary

Location

Banff, calgary,Canada

ISBN

0-230-94659-3

Book

sborník - 27th International Technical Meeting on Air Pollution Modelling and its Application

Edition number

1

Pages from

501

Pages to

502

Pages count

2

BibTex


@inproceedings{BUT18223,
  author="Jiří {Pospíšil} and Miroslav {Jícha}",
  title="COMPARISON OF DIFFERENT TURBULENCE MODELS APPLIED TO MODELLING OF AIRFLOW IN URBAN STREET CANYON AND COMPARISON WITH MEASUREMENTS",
  annote="The CFD code StarCD was used for airflow modeling in an urban street canyon.  A numerical model of a calculated area involves not only the studied street canyon but also surrounding buildings. 
Series of calculations were done for three different wind directions, namely longitudinal, perpendicular and oblique wind direction. The wind direction orientation is related to the longitudinal axis of the studied street canyon. Velocity fields were solved for wind velocities 3 m/s and 6 m/s as obtained from the measurements at height 25 m above ground level.
In total, three different turbulence models were tested. As a first one, K-  Hi-Re model was used as the most common model used in CFD. As a second, K-  RNG model of turbulence was taken into account. From different studies it follows that this model provides good results of air flow in urban areas. Third, the K-  Lo-Re model of turbulence (Lien, F.S., Chen, W.L., and Leschziner, M.A., 1996) was used. Three different wind directions and two different wind velocities were tested with all models of turbulence.",
  address="University of Calgary",
  booktitle="sborník - 27th International Technical Meeting on Air Pollution Modelling and its Application",
  chapter="18223",
  institution="University of Calgary",
  year="2004",
  month="october",
  pages="501--502",
  publisher="University of Calgary",
  type="conference paper"
}