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Job Record #15703
TitlePostDoc - DNS of detached turbulent boundary layer flows
CategoryPostDoc Position
EmployerLMFL- CNRS
LocationFrance, Lille
InternationalYes, international applications are welcome
Closure DateWednesday, May 01, 2019
Subject: For road transportation, the highest energy losses are aerodynamic when
speeds above 50 km/h are reached. Shape optimization techniques have now reached
their limit and can only bring small improvements at the cost of considerable
experimental and/or computational efforts.  In aeronautics, flow control has
become an issue for drag reduction as well as lift improvement. These
improvements will directly result in a reduction of nuisances (polluting or
emissions), consumption and improved safety in flight. Other areas could be
impacted by effective control technologies, for example the field of wind
turbines, turbomachinery or marine transportation. For more than ten years,
researchers have succeeded in delaying flow separation by completely
reorganizing the turbulence upstream of the separation to restore the momentum
of the fluid at the cost of a significant energy expenditure. The work carried
out on massive detached flows has therefore shown the limitation of these
methods in terms of energy balance.
The aim of the present subject is to build an extensive and well documented
numerical database in order to investigate the physics of detached turbulent
flows. The objective of the post-doc is to perform a Direct Numerical Simulation
of a configuration of detached flow, without active control as a first step,
similar to the one studied for the last 10 years in the LMFL high Reynolds
number wind tunnel. In a second step this new database will be used to analyze
the physics of the flows in order to establish correlation between the physics
of detachment to the coherent structures of upstream turbulence and coherent
structures generated by the control. The detailed energy transfer in space and
scale will also be investigated. The simulations will be performed in close
collaboration with the Aerodynamics, Aero-elasticity, Acoustics Department of
ONERA using one of their massively parallel codes already validated for HPC 

Laboratory:  Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet
(LMFL) ( is a joint laboratory between: ONERA, CNRS,
Centrale Lille, University of Lille, Ecole Nationale Supérieure d’Arts et
Métiers (ENSAM), where 35 faculties and engineers work in the fields of
turbulence, aerodynamics and flight physics. The team hosting the Post-Doc is
involved in fundamental study of turbulence, and optical measurement techniques.
The fellowship is provided in the framework of the ELSAT2020 project.

Fellowship: The salary is 2200 € per month. The 12 months fellowship can start
any time until July 2019.

Candidate: Highly motivated by research in Fluid Mechanics, he has strong
background in numerical simulation and turbulence. An experience in High
Performance Computing on supercomputers will be appreciated. The candidate
should write and speak English.

Contact Information:
Please mention the CFD Jobs Database, record #15703 when responding to this ad.
NameJean-Philippe LAVAL
Email ApplicationYes
Phone+33 320337160
AddressLMFL - CNRS FRE 2017
Cité Scintifique
F-59655 Villeneuve d'Ascq
Record Data:
Last Modified22:32:56, Thursday, February 28, 2019

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