*Subject (Title)
CFD modeling and simulation of pollutants dispersion in urban environment

*Keywords
Modeling and Simulation, Computational Fluid Dynamics (CFD), Aerodynamics, Particles
Dispersion, High Performance Computing, Turbulence, Environmental Engineering

*Hosting Entities
The University of Rouen Normandy (https://www.univ-rouen.fr/), with its strong multidisciplinary
identity, is a major player in training and research in Normandy region and in France. It pays
particular attention to overcome the challenges of higher education and contribute to the overall
economic and social development of its territory. Created in 1967, CORIA, “Complexe de
Recherche Interprofessionnel en Aérothermochimie" (https://www.coria.fr/en/the-lab/), is a Joint
Research Unit (UMR 6614) CNRS and the University of Rouen Normandy.

*Research Context
This research internship is a part of a large project “HÉLIOS” entitled “De la caractérisation
spatiale, sanitaire et sociale des pHÉnomènes d'îLots de chaleur urbaIns à l'exploration et
l'évaluation de solutiOns d'adaptation fondéeS sur la nature” by 5 lcoal region communities (Le
Havre, Métropole Rouen Normandie, Mantes-la-Jolie, Communauté d'Agglomération de Cergy-
Pontoise, Argenteuil) in collaboration with CORIA Lab, other labs and T.URN institute
(https://www.univ-rouen.fr/actualites/decouvrez-linstitut-t-urn/). This internship is also in a global
context of developing a multi-risk platform in Normandy region in France (e.g. for floods, fires and
particles dispersion, air pollution dispersion, among others). One of the missions is to predict
accurately the local urban heat island effects and local heat waves at the scale of the city.

*Objective
The main objective is to develop, implement and validate a mesoscale model in CFD to take into
account the air pollutants dispersion in outdoor microclimate and their local interaction with
vegetation and green spaces. The latter usually modifies the mean flow motion into wake turbulence
where the smaller length scales compared to the turbulence generated by the shear flow induces a
fast dissipation. This will allow to investigate how local trees in the métropole region can contribute
1to the local interaction with air pollutants dispersion outdoors under different wind speeds, air
conditions, solar radiation and stomatal resistance.
The major 3 work packages in this internship are the following:
1- Take into hands the CFD code OpenFOAM® and implement a new turbulence-modified models
2- Define and solve a bench 3D CFD case to validate the newly implemented turbulence models
3- Define and solve a 3D CFD case of the métropole that will investigate/predict the effects of
different scenarios of local wind speeds, air conditions, solar radiation and stomatal resistance.

*Required Profile
Scientific Background: Student currently in Master-2 (M.Sc.) in the fields of computational fluid
dynamics, environmental engineering, aerodynamics, turbulence, heat and mass transfer, continuum
modeling of air pollutants dispersion, advection of concentration of pollutant particles. Experience
within OpenFOAM® in particular would be a plus (https://www.openfoam.com/).

*Skills: Taste for modeling and numerical simulation in CFD, in-depth notions in fluid mechanics
and turbulence, and aerodynamics in presence of obstacles and immersed objects. Interest in high
performance and parallel computing within CFD. Good taste for a teamwork and a good level of
Scientific English, speaking, reading and writing.

*Supervisors
Prof. DBOUK Talib (CORIA), Prof. REVEILLON Julien (CORIA), Dr. GEFFROY Alexandre (T.URN)

*Remuneration
≈600 € /month

*Apply
Please send your CV and motivation letter to the following email addresses:
talib.dbouk@coria.fr
julien.reveillon@coria.fr

*References
Amorim, J.H., Rodrigues, V., Tavares, R., Valente, J., Borrego, C., 2013. CFD modelling of the
aerodynamic effect of trees on urban air pollution dispersion. Sci. Total Environ.
461, 541–551. https://doi.org/10.1016/j.scitotenv.2013.05.031