Organisation/Company: CNRS
Department: Laboratoire de Physique
Research Field: Physics
Researcher Profile: First Stage Researcher (R1)
Country: France
Application Deadline: 26 Nov 2024 - 23:59 (UTC)
Type of Contract: Temporary
Job Status: Full-time
Hours Per Week: 35
Offer Starting Date: 1 Jan 2025
Is the job funded through the EU Research Framework Programme? Not funded by a EU programme
Is the Job related to staff position within a Research Infrastructure? No
Offer Description A postdoctoral position is open at the Laboratoire de Physique of école Normale Supérieure de Lyon in Lyon, France. The project is devoted to the settling of spheroidal (rod-like or disk-like) particles in a homogeneous isotropic turbulent flow. We focus here on objects smaller than the Kolmogorov scale of the flow and much heavier than the surrounding fluid. One of the main motivations for studying this system indeed comes from cloud microphysics (ice crystals in air). Our group has investigated more particularly the statistical orientation and the collisions of these particles, which play a major role in the formation of precipitation in cold clouds. Monodisperse suspensions of disk-like and rod-like particles have been investigated so far.
The next step of the project will consist in considering polydisperse suspensions of non-spherical objects. The postdoctoral researcher will join this research program. She/he will more specifically analyze by direct numerical simulation the detailed kinematics, dynamics and distribution of the particles in the flow.
The selected candidate will contribute to this effort at several levels, by:
Getting familiar with the available code of integration of the Navier-Stokes equations by direct integration (direct numerical simulation), which can follow the motion of small and very dense spheroidal particles.
Carrying out the required numerical simulations.
Analyzing the results of these simulations.
This position is part of a larger project, "Time Irreversibility in Lagrangian Turbulence: scaling, anomalies and dispersion", involving several groups in France (Paris, Nice) and financed by the ANR.
Minimum Requirements:
The candidate must hold a PhD in Physics, Mechanics or Applied Mathematics, and have a solid knowledge in at least one of the following areas: hydrodynamic turbulence, particle transport in a fluid.
Previous experience in numerical methods of spectral type and/or in parallel computing will be highly appreciated.
Experience of scientific English and in the writing of publications for scientific journals, as well as in the presentation of research results in international conferences, is required.
The candidate must be able to work as part of a team, and to interact with researchers of the same level or more experienced.
Additional comments: The contract duration will be 12 months. The date of employment can be discussed, but the contract must end on December 31, 2025 at the latest.
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