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Actualités

  • 01 DEC 31 DEC
    The International Journal of Multiphase Flow (IJMF) will be holding virtual V-seminars for the benefit of the journal, its authors, and the multiphase flow community at large. Our goal is to hold these V-seminars for an initial two-year period, until the end of 2022. We intend to promote communication among the multiphase flow community, which has suffered during the Covid pandemic.
  • 01 DEC 31 DEC
    The Leeds Institute for Fluid Dynamics is delighted to partner with the Department of Applied Mathematics and Theoretical Physics at the University of Cambridge, the UK Fluids Network, and the Journal of Fluid Mechanics to deliver a regular webinar series on fluids-related topics.
  • 01 DEC 31 DEC
    Le CNRS met en place un programme de prématuration dont l’objectif est de soutenir les toutes premières étapes de développement de projets émergents à fort potentiel d’innovation. Il s’agit d’accompagner l’étape de prématuration en fournissant des recommandations et les moyens financiers pour y arriver.
  • 01 JAN 31 DEC
    Création de la Division Physique Non Linéaire (DPNL) de la Société Française de Physique (SFP)
  • 01 OCT 31 DEC
  • 01 JAN 31 DEC
    Poursuivant son partenariat avec l'Association Française de Mécanique (AFM), le Comité National Français de Mécanique (CNFM) dispose d'allocations pour favoriser la participation de jeunes chercheurs et chercheuses permanent(e)s à des colloques internationaux se tenant à l'étranger en 2022. Les candidatures féminines sont encouragées.
  • 01 JAN 01 JAN
    Ce GDR regroupe la communauté des théoriciens : physiciennes, climatologues, océanographes, atmosphériciens, mathématiciennes, informaticiens, sciences numériques, machine learning (apprentissage automatique), qui travaillent sur les sciences du climat.
  • 01 JAN 01 JAN
    Ce projet consiste essentiellement en un institut sans mur, à vocation nationale, capable de fédérer largement la communauté mathématique pour aborder des questions provenant d’autres domaines scientifiques dans une approche nécessairement pluridisciplinaire.

Evénements

  • 15 MAY 20 MAY
    https://www.nonlinear-processes-in-geophysics.net/articles_and_preprints/scheduled_sis.html
  • 02 NOV 04 NOV
    La prochaine réunion du GDR aura lieu à Lille, du 2 au 4 novembre.Réservez vos dates !
  • 22 NOV 24 NOV
    Depuis 1987, tous les deux ans, les Journées de l'Hydrodynamique (JH) rassemblent les chercheurs et ingénieurs, principalement francophones, en hydrodynamique marine et navale dans les domaines civil et militaire pour présenter et discuter les travaux de recherche les plus récents.
  • 12 JUN 14 JUN
    Aerovehicles 5 is meant as a place where engineers and researchers can exchange their ideas and progress in ground vehicle aerodynamics. It is a forum for engineers and scientists from both industry (manufacturers and operators of road vehicles and trains) and universities to present and discuss recent advances and latest methodologies in the field of vehicle aerodynamics, and identify research needs concerning: physical modelling; numerical predictions; experimental approaches and analysis of huge data fields.

Thèses et Post-docs

  • 01 SEP 01 SEP
    La convection thermique turbulente constitue un problème omniprésent dans de nombreuses situations naturelles. Elle peut être modélisée en laboratoire par la cellule de Rayleigh-Bénard. Il s’agit d’une couche de fluide confinée entre deux plaques horizontales. Le fluide est chauffé par le bas, et refroidi par le haut. Les couches limites thermiques se forment au voisinage des plaques. L’instabilité de flottabilité conduit à la germination de structures cohérentes, applées panaches thermiques. Ces panaches et leur interaction donnent naissance à un mouvement global (la circulation grande échelle). Lorsque le forçage est suffisamment intense, l’écoulement peut devenir turbulent, et le comportement global est déterminé par la compétition entre les effets purement inertiels, le forçage thermique local et l’interaction entre panaches.
  • 01 JAN 31 AUG
    The work of the candidate will aim for the development of the following tasks:1. Implementation of data streaming machine learning techniques within the C++ software developed by the research group, aiming to reconstruct an augmented IBM formalism. The AI learning procedure will be fed by online data generated by the MGEnKF.2. The performance of the code will be assessed via the analysis of progressively more complex scale-resolved turbulent flows. The test cases investigated include the turbulent channel flow and, in case of success, complex test cases such as a radial pump will be investigated. For every test case considered, high fidelity DNS / experimental data are already available from previous analyses of the research group.
  • 01 JAN 31 DEC
    The influence of rain on flows around vehicles is a new emerging theme at LMFL. A crucial aspect of the physics that determines both the mean drag and its fluctuations concerns the sharp and dynamic interface that exists in turbulent sheared flows between the turbulent and non-turbulent parts of the flow. An important aspect of the influence of rain is the interaction between droplets and this interface, and this aspect is in fact of more general importance as it is present in other situations (environmental dispersion, clouds, etc).
  • 01 JAN 31 DEC
    The present project is at the interface between Maths and Physics and aims at providing accurate, efficient and predictive modeling tools for the transport of particles and pollutants in turbulent conditions as encountered in natural atmospheric and oceanic conditions.
  • 01 JAN 31 DEC
    L'objectif de ce post-doctorat est de réaliser et d'exploiter des simulations directes de turbulence compressible homogène avec forçage, de façon à mettre en évidence les propriétés inertielles de la circulicité.
  • 01 JAN 01 JAN
    The design and operation of future large wind turbines require an in-depth understanding of the interaction between the rotor and the turbulent wind in the atmosphere. To this end, we will scan the entire wind field in front of, at and close behind two multi-megawatt wind turbines with a high spatial and temporal resolution, using the laser-based scanning technique lidar (light detection and ranging).Our two short-range WindScanners are continuous-wave Doppler wind lidars. They remotely measure the wind speed component along the beam direction (line-of-sight wind speed) at several hundred positions each second. A wind field can be reconstructed using these point measurements and additional meteorological information. In this project, particular focus will lie on wind field reconstructions using novel stochastic methods, which consider statistical features of small-scale turbulence.
  • 01 JAN 31 DEC
    The proposed research aims at studying the dynamics of smoke vortices (very recently discovered in the stratosphere) by the mean of numerical simulations with an adapted version of the Weather Research and Forecast model. The postdoc will explore idealized flow configurations but also perform realistic case studies, which will be confronted to observational data from the 2020 and 2017 cases. This work will be carried out in close collaboration with other team members involved in observational and impact studies, theoretical modeling and laboratory experiments.
  • 01 NOV 30 OCT
    The Fluid Mechanics Laboratory of Lille (CNRS-LMFL) is seeking a highly qualified candidate for a post-doctoral research fellowship to participate in ERC Advanced Grant research project NoStaHo which is aimed at an extensively transformative fundamental understanding and theory of non-stationary and/or non-homogeneous turbulence.The candidat will participate in the experimental side of the project by contributing to (i) Particle Image velocimetry and Hot Wire Anemometry measurements and (ii) various ways to analyse the data obtained for a variety of turbulent flows including various types of turbulent wakes, jets and boundary layers.
  • 01 NOV 01 NOV
    Turbulence et circulations à résolution décamétrique dans les nuages convectifsDans le cadre de cette thèse, nous souhaitons étudier les processus physiques à l’interface nuageuse à l'aide de simulations à très fine résolution (LES décamétrique) avec le modèle Méso-NH (Lac et al, 2018). L'objectif est de caractériser les circulations au sein des nuages convectifs (du cumulus au cumulonimbus), ainsi que les structures turbulentes associées.
  • 01 NOV 31 OCT
    A goal of this research project is to propose solutions to improve the performance of heat exchang-ers by using acombination of active control strategiestomaximise heat-transfer capacityalong the interface fluid/structureandminimise the pressure loss due to friction betweenthe fluid and the wall.
  • 01 NOV 01 NOV
    The aim of the PhD project is to understand the dynamics of jets hitting a surface, using a combination of experimental, numerical and theoretical approaches.
  • 01 OCT 30 SEP
    The objective of this postdoc is to study the importance of the fluid miscibility on the RTI dynamics using highly resolved simulations with the pseudo-spectral code STRATOSPEC . A diffuse interface method relying on the Cahn-Hilliart equations will be coupled to the Navier-Stokes solver. To this aim, we propose to assess the efficiency of various semi- or fully implicit numerical methods. Computational resources for the simulations will be provided through the TGCC supercomputers. Different theories and models will be proposed to interpret the results.
  • 01 OCT 30 SEP
    La production d’énergie à ce jour a une importance majeure et dans ce contexte les sources renouvelables attirent de plus en plus l’attention. Les systèmes de production d’énergie renouvelable ont gagné en com- plexité afin d’optimiser la production et d’assurer sa stabilité.
  • 01 SEP 31 AUG
    Dans le contexte de changement climatique, il est parfois difficile de distinguer les influences anthropiques, de la variabilité naturelle, tant celle-ci est complexe et pourtant si importante qu’elle peut masquer les effets des activités humaines sur le climat. C’est notamment le cas pour la variabilité de la circulation atmosphérique, que les modèles numériques actuels ne reproduisent pas correctement. L’une des raisons est l’impossibilité pour ces modèles de simuler les processus physiques sur l’ensemble des échelles spatio-temporelles où elles se produisent et notamment comment différents processus à différentes échelles interagissent. Le but de la thèse est de comprendre le lien entre les grandes échelles spatio-temporelles des mouvements cohérents de l’atmosphère et les statistiques à l'échelle régionale des différents champs turbulents (vitesse, température, humidité, précipitations), et notamment les événements rares ou extrêmes.
  • 01 SEP 01 FEB
    Two years post-doctoral position on experimental/numerical fluid dynamics with applications to sub-surface oceans in icy moons. Collaboration with LPG Nantes and IPG Paris within the ANR COLOSSe project. Focus on mixing induced by topography in a stratified fluid.
  • 01 SEP 31 AUG
    A postdoctoral position is open to study experimentally the statistical properties of turbulence in a stratified medium in the Coriolis facility.
  • 01 SEP 31 AUG
    L’objectif de cette thèse est de comprendre les mécanismes à l’origine du bruit de décrochage statique et dynamique à l’aide de simulations des grandes échelles ou de méthodes hybrides RANS-LES, et de proposer des méthodes de réduction en jouant sur la forme des profils (épaisseur et cambrure) et la forme du bord d’attaque.
  • 01 SEP 31 AUG
  • 01 SEP 01 SEP
    TWe are currently offering two PhD positions: Experimental measuremenst of multiphase flows and numerical simulations of multiphase flows.The official advertisement will be opened soon, but inquiries can be sent to Mrs. Müllner at christina.muellner@tuwien.ac.at
  • 01 AUG 01 APR
    The objective of this postdoc position is to improve the CYCLONE library developed by RTECH, possibly by incorporating a different type of Immersed Boundary Method (IBM), such as the sharp interface method, which is presently under investigation at Pprime Institute.
  • 01 JUL 30 SEP
    Melting, dissolving, and erosion are processes that are frequently found in nature and technology. Contrary to common believe these three processes do not always smooth the surface, but rather form structures and sometimes even sharpen the surface. This leeds to the formation of e.g. ice scallops and pinnacles, for some examples of patterning and roughening. The continuously changing shape of e.g. a melting iceberg and its interaction with the external turbulence is very complicated as it involves three boundary layers: kinetic, thermal, and solutal (due to the salt concentration). The interaction between those boundary layers is highly complex and not understood. In particular, what is the effect of the surface roughness on the melting rate? The aim is to study the interaction of these boundary layers in a controlled lab environment such as to increase our understanding of these phenomena and their relevance on e.g. the melting rate of ice of icebergs and (tidal) glaciers, all important in view of global war
  • 01 MAY 31 AUG
    In atmospheric clouds, in industrial power plants, and in the pandemic we have been living, a crucial element is the interaction of small particles with the turbulent flow that carries them. Will two ice crystals collide and aggregate to form a snowflake? Will an ocean wave break and splash droplets in the atmosphere? How far will a drop of saliva travel in air? Particle-laden turbulent flows are ubiquitous and extremely challenging to predict: the chaotic motion of the fluid is intertwined with the particles’ ability to exchange momentum and energy at the microscopic scale, while also altering the flow globally.
  • 01 SEP 31 AUG
    The aim of the present project is to develop an efficient solid wall treatment for LBM, including turbulent wall models. Several issues will be addressed, among which:• interpolation methods used within the Immersed-Boundary Method (IBM) or Cartesian meshes framework for solid boundary treatment [1-2]• use of a turbulent wall model in conjunction with immersed solid boundaries [3]• reconstruction of the density distribution functions of LBM at boundaries nodeswithin this framework (accuracy, mass conservation, ...)• reconstruction of macroscopic quantities on the solid surface for post-processing purposes (eg. calculation of aerodynamic forces applied on an airfoil)• extension to moving/deforming solid boundaries
  • 01 SEP 31 AUG
    This thesis will focus on internal tidal waves (at diurnal and semi-diurnal frequencies), and may further extend to other type of ocean internal wave (e.g. near-inertial waves).
  • 01 SEP 31 AUG
    Multiple PhD positions are available at Eindhoven University of Technology in the field of turbulence research.
  • 01 MAY 31 AUG
    The School of Science and Engineering at Reykjabik University (Iceland) is looking for a PhD student to work on the project “Lagrangian Dispersion in Mixed Convective Turbulence “.

 

Emplois

  • 02 FEB 30 APR
    L’Institut AéroTechnique (CNAM) à St-Cyr recrute un ingénieur de recherche (20 mois) pour réaliser des mesures en soufflerie dans le cadre d’un projet d’optimisation de l’aérodynamique avec la Fédération Française de Cyclisme.
  • 01 SEP 01 NOV
    Une des 25 chaires CPJ du CNRS :https://www.cnrs.fr/fr/cnrsinfo/le-cnrs-recrute-25-postes-de-chaires-de-professeur-junior
  • 01 JAN 01 JAN
    Au sein du Service commun d’Assistance Technique à l’Enseignement et à la Recherche (SATER) ducampus de Lille, vous intégrerez une équipe de 13 personnes. Plus particulièrement, le candidat retenucontribuera à la structuration et aux développements des activités des laboratoires LMFL et L2EP dans ledomaine de la simulation numérique en Mécanique des Fluides (LMFL) et en Electromagnétisme (L2EP). Ilsoutiendra également, en pédagogie, les travaux de développement de jumeaux numériques des installationsexpérimentales du Campus ENSAM de Lille.