Parameterizing the aerodynamic effect of trees in street canyons for the street network model MUNICH using the CFD model Code_Saturne

Maison, Alice; Flageul, Cédric; Carissimo, Bertrand; Wang, Yunyi; Tuzet, Andrée; Sartelet, Karine

doi:https://doi.org/10.5194/acp-22-9369-2022

Articles | Volume 22, issue 14

https://doi.org/10.5194/acp-22-9369-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Air quality research at street level (ACP/GMD inter-journal...

https://doi.org/10.5194/acp-22-9369-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 14

Research article

|

20 Jul 2022

Research article |

| 20 Jul 2022

Parameterizing the aerodynamic effect of trees in street canyons for the street network model MUNICH using the CFD model Code_Saturne

Alice Maison, Cédric Flageul, Bertrand Carissimo, Yunyi Wang, Andrée Tuzet, and Karine Sartelet

Model code and software

The Model of Urban Network of Intersecting Canyons and Highways (MUNICH) Youngseob Kim, Karine Sartelet, Lya Lugon, Yelva Roustan, Thibaud Sarica, Alice Maison, Myrto Valari, Yang Zhang, and Michel André https://doi.org/10.5281/zenodo.6167477

Parameterizing the aerodynamic effect of trees in street canyons for the street-network model MUNICH using the CFD model Code_Saturne - Code_Saturne simulation dataset Alice Maison and Cédric Flageul https://doi.org/10.17632/fzfrjsz3mv.2

Short summary

This paper presents a parameterization of the tree crown effect on air flow and pollutant dispersion in a street network model used to simulate air quality at the street level. The new parameterization is built using a finer-scale model (computational fluid dynamics). The tree effect increases with the leaf area index and the crown volume fraction of the trees; the street horizontal velocity is reduced by up to 68 % and the vertical transfer into or out of the street by up to 23 %.