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Reference : UMR5149-NATCOL-003
Workplace : MONTPELLIER
Date of publication : Thursday, April 08, 2021
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 May 2021
Proportion of work : Full time
Remuneration : Between 2675 and 3805 € (gross salary) depending on experience
Desired level of education : PhD
Experience required : 1 to 4 years
The YALES2BIO team of the Institute of Montpellier Alexander Grothendieck (IMAG), originally specialized in blood flow simulations, has been developing Computational Fluid Dynamics (CFD) for the assessment of the risks of COVID-19 transmission for a year. The team focuses on speech-associated flows and transmission risks, with 2 major publications in the domain in 2020 (https://www.pnas.org/content/117/41/25237 and https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.5.122501). The YALES2BIO team benefits from the scientific and technical environment of the YALES2 software, a CFD tool for high-performance computing of turbulent flows (https://www.coria-cfd.fr/index.php/YALES2). Thanks to the numerical methods implemented in YALES2, the CFD accounts for complex geometries, flow signals, turbulence, thermal effects, evaporation and complex environmental conditions.
IMAG is looking for a postdoctoral fellow with a PhD thesis in Physics, Fluid Mechanics or Applied Mathematics with a strong background and experience in Computational Fluid Dynamics (CFD) to perform simulations of speech-associated flows and the associated transport of infectious droplets in the environment until inhalation by a susceptible person, accounting for the most critical physical aspects of the problem.
The role of the postdoctoral fellow will be to set up simulations, assess their quality and determine the level of complexity for the modeling of the physical phenomena, post-process the results, interpret them and write scientific articles. All simulations will be performed with the YALES2 CFD software.
- Learn how to use YALES2 and program in YALES2 (fortran)
- Set up the simulation frameworks for the transport and inhalation of pathogens (meshing, boundary conditions, relevant conditions from the literature…)
- Revisit modeling assumptions with recent results from the literature (droplet evaporation, inflow signals, thermal effects…)
- Run simulations on supercomputers and post-processing data. Automatize the post-processing with well-documented and testesd python programs
- Validate results with experiments from CBS Montpellier.
- Write scientific articles
- High-performance Computational Fluid Dynamics (*)
- Turbulent and unsteady flows (*)
- Programming (fortran or C, C++, matlab…) (*)
- Programming in Python (*)
- Fluent in English (*)
- Writing scientific articles (*)
- Two-phase flows, thermal effects, evaporation…
- Post-processing of CFD calculations (paraview, Ensight, Visit, vtk…)
- Environment for programming and documentation (svn, git, wiki, continuous integration)
(*) most important skills
The Institute of Montpellier Alexander Grothendieck (IMAG), is looking for a postdoctoral researcher. The successful candidate will integrate the YALESBIO team, which has notably been developing simulations for COVID-19 transmission since March 2020. The YALES2BIO team (5-10 PhD candidates, postdocs and permanent researchers depending on the year) is supervised by Dr. Simon Mendez and Prof. Franck Nicoud, and works with a unique solver, YALES2 (https://www.coria-cfd.fr/index.php/YALES2).
The scientific supervision of the postdoctoral fellow will be ensured by Simon Mendez, Researcher at CNRS, responsible for the application of YALES2 to the study of the airborne transmission of SARS-CoV-2. The postdoc will benefit from the favorable environment of the team, of the IMAG lab, and of the YALES2 consortium of French, Belgian and American research teams. In addition, note that a Research Engineer has just been recruited for simulations of speech-associated flows, also in relation with the COVID-19 crisis.
In this project, we will also collaborate with Dr. Manouk Abkarian (CBS Montpellier), who received funding from the ANR for experiments on the dynamics of speech droplets.
The postdoctoral fellow will join the existing collaborations that IMAG currently has with different labs in France and worldwide for COVID-19 associated CFD (CNRS Montpellier, Lyon, Grenoble, Rouen in France, Univ. Princeton, and Univ. Vermont, USA, IIT Kharagpur, India).
Constraints and risks
Work on computer
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