Organisation/Company: CNRS UMR6614 CORIA
Research Field: Engineering › Simulation engineering
Researcher Profile: First Stage Researcher (R1)
Application Deadline: 02/06/2022 23:00 - Europe/Brussels
Location: France › Saint Etienne du Rouvray
Type Of Contract: Temporary
Job Status: Full-time
Hours Per Week: 35
Offer Starting Date: 03/10/2022
PhD offer 2022-2025: Study of the performance of wind and tidal turbines as
a function of operating conditions by high-fidelity numerical simulation
In the context of the development of renewable energies, wind power has become
a mature technology after several decades of development. Today, the share of
wind power in the energy mix is constantly increasing and offshore wind
turbines are increasingly being implemented because the wind resource is more
important and more stable PPE 2020. At the same time, other technologies
such as tidal turbines are being developed. The latter still suffers from
reliability and performance problems. However, several farms of 3 or 4
prototypes are being tested around the world MeyGen 2021, EnFait 2021.
Wind and tidal power are two similar technologies: they seek to extract
kinetic energy from the fluid in which they are immersed (air or water)
using a rotating machine. The energy source of these rotors being intermittent
by definition, their production depends directly on the operating conditions.
In addition to the intermittence, i.e. variation in amplitude, the upstream
flow can vary on other characteristics: turbulence rate, anisotropy,
characteristic lengths, boundary layer... These properties can lead to
variations in turbine performance and mechanical loads Slama 2021. The
cost of energy and the life of the machines are then affected Walker 2021.
In order to reduce installation and maintenance costs, offshore wind and tidal
turbines are grouped in farms that can have up to 50 machines. In this
configuration, turbine-to-turbine wake interaction phenomena appear, again
impacting performance and loads Gaurier 2020.
A detailed understanding of the physical phenomena involved in the flows
around wind and tidal turbines, and more specifically the aerodynamics around
the blades and in the wake, is therefore essential to optimize them, reduce
costs and extend their lifetime.
The objective of this thesis is to better characterize the performance, loads
and impact on the wake of offshore wind and tidal turbines as a function of
operating conditions and to deepen the knowledge on the machine-to-machine
interactions in the farms. This work will be performed using high-fidelity
numerical simulations with the YALES2 platform.
YALES2 aims at solving unsteady, multi-physics and multi-scale flows
efficiently on supercomputers Moureau 2011. It is based on an Eulerian
approach of the flow and is able to handle complex geometries using
unstructured meshes of several billion elements, making possible the direct
numerical simulation of laboratory or even semi-industrial configurations. The
Actuator Line method has been implemented to model wind rotors Benard2018
and has recently been coupled with a servo-elastic library Gremmo 2021.
The thesis work will consist of 2 main tasks:
• Study of the performances, loads and wakes of wind and tidal turbines in
several configurations: amplitude and direction of the upstream flow,
turbulence rate, anisotropy, characteristic lengths, boundary layer... The
goal is to generate a database of numerical calculation results with different
numbers of turbines and under different conditions. This database will then be
post-processed and analyzed.
• Comparison of two advanced numerical methods: simulations performed with
YALES2 will be compared to those performed with the Dorothy code (code
developed at the LOMC laboratory, in collaboration with IFREMER and CNRS)
Pinon 2012. Although both codes are dedicated to unsteady turbulent flows,
they use fundamentally different numerical methods. The codes will therefore
be compared on some aspects such as the quality of the results, the
restitution time or the parallel performances. The idea is to identify the
advantages/disadvantages of each approach on a given range of spatial/temporal
scales and/or a given configuration (single turbine, multi-turbine, whole
• 3-years PhD thesis at CORIA laboratory, Rouen
• Salary: roughly 1600€ net/month
• Starting date: preferentialy 1st october 2022
• Funding: Labex EMC3, WILIAM project in collaboration with LOMC laboratory
• Contact: Pierre BENARD (firstname.lastname@example.org)
Benard2018 Benard, P., Viré, A., Moureau, V., Lartigue, G., Beaudet, L.,
Deglaire, P., Bricteux, L. (2018). Large-Eddy Simulation of wind turbines
wakes including geometrical effects. Computers and Fluids, 173, 133–139.
EnFait2021 Enabling Future Arrays in Tidal https: // www. enfait.eu/ last
view 27 sept. 2021
Gaurier2020 B. Gaurier, C. Carlier, G. Germain, G. Pinon, and E. Rivoalen.
Three tidal turbines in interaction : An experimental study of turbulence
intensity effects on wakes and turbine performance. Renewable Energy, 148
:1150 – 1164, 2020
Gremmo2021 Simone Gremmo, Félix Houtin-Mongrolle, Pierre Bénard, Bastien
Duboc, Ghislain Lartigue, et al.. Large-Eddy Simulation of Deformable Wind
Turbines. WESC2021, May 2021, Hannover, Germany
Meygen2021 Tidal Stream Project MeyGen
https: // simecatlantis.com/projects/meygen/ last view 27 sept. 2021
Moureau2011 Moureau, V., Domingo, P., Vervisch, L. (2011). Une
algorithmique optimisée pour le supercalcul appliqué à la mécanique des
fluides numérique. Comptes Rendus - Mecanique, 339 (2–3), 141–148.
Pinon2012 G. Pinon, P. Mycek, G. Germain, and E. Rivoalen. Numerical
simulation of the wake of marine current turbines with a particle method.
Renewable Energy, 46(0) :111 – 126, 2012
PPE2020 Décret n° 2020-456 du 21 avril 2020 relatif à la programmation
pluriannuelle de l'énergie
https: // www. legifrance.gouv.fr/jorf/id/JORFTEXT000041814432
Slama2021 M. Slama, G. Pinon, C. El Hadi, M. Togneri, B. Gaurier, G.
Germain, J.-V Facq, J. Nuno, P. Mansilla, E. Nicolas, J. Marcille, and A.
Pacheco. Turbine design dependency to turbulence : an experimental study of
three scaled tidal turbines. Ocean Engineering, 234 :109035, 2021
Walker2021 S. Walker and P.R. Thies. A review of component and system
reliability in tidal turbine deployments. Renewable and Sustainable Energy
Reviews, 151, 2021
• Application process:
o Send CV, cover letter and grades of Master 1 and 2 or equivalent engineering
level to email@example.com
o The closing date for sending applications is June 1st, 2022.
Interviews will be performed along the way.
REQUIRED EDUCATION LEVEL
Engineering: Master Degree or equivalent
• Master degree in Mechanical or Energetic engineering (Fluid mechanics,
Aerodynamics, Scientific computing, CFD).
• High level of communication skills, both oral and written (French or
English required) to be able to present at conferences and write articles in
Organisation/Company: CNRS UMR6614 CORIA
Organisation Type: Higher Education Institute
Website: https: // www. coria.fr/
City: Saint Etienne du Rouvray
Postal Code: 76800
Street: Avenue de l'Université