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Offres de Thèses et Postdocs

  • 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 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 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 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 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 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 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 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 NOV 01 OCT
    We have a number of post-doctoral and doctoral positions on ocean modeling to fill in our Odyssey team at Inria (Rennes, France).
  • 01 DEC 01 DEC
    L'ébullition est un phénomène complexe impliquant à la fois une dynamique complexe et des effets thermiques forts. Une bonne compréhension des différents régimes d'écoulement (bulle, poche, annulaire) est nécessaire pour modéliser correctement ce phénomène dans le cadre d'étude de conception ou de sûreté industrielle. L'objectif de la thèse est d'identifier les conditions d'écoulement amenant un essaim homogène de bulles à se déstabiliser. Il convient de caractériser ce type de transition pour mieux comprendre des effets d'accumulation locale de bulles pouvant amener à de la coalescence, par exemple. Cette étude se fera via des simulations numériques directes et une méthode de capture d'interface Front-Tracking permettant le suivi lagrangien des bulles.
  • 01 JAN 01 JAN
    L’objectif de ce postdoc est de caractériser théoriquement et numériquement le couplage d’écoulements de sillages turbulents pour plusieurs corps présentant différentes géométries. Les approches seront multiples et permettront de comparer les modèles développés récemment avec des modèles classiques et des simulations numériques directes. Des comparaisons expérimentales seront réalisées dans le cadre du projet SILTURB à l’aide d‘expériences dédiées réalisées à l’UME de l’ENSTA. Les résultats de ces études ont pour objectif de proposer des modèles de fermeture nouveaux implémentables dans les codes CFD
  • 01 JAN 31 DEC
    As part of the BANG project, funded by the French National Research Agency, we are exploring the validity of the Navier-Stokes equation as a fluid model by studying phenomena occurring below the Kolmogorov scale, using multi-scale tools and advanced visualization techniques, namely 4D particle tracking velocimetry (4D-PTV), in a large-scale turbulence experiment called Giant Von Karman (GVK) built at the CEA.
  • 01 FEB 01 APR
    We have developed an airborne platform called the Max Planck CloudKite (MPCK). It has been deployed over the Atlantic Ocean during the EUREC4A research cruise and in northern Finland inside the Arctic Circle. Our instruments perform autonomous measurements in the atmosphere, including particle image velocimetry and holography. In the next phase of our investigations, we will simultaneously measure with high resolution aerosols, wind speed and atmospheric thermodynamics as a function of altitude. These measurements will be complemented by most advanced microphysical cloud measurements. In collaboration with our colleagues at the Fraunhofer Institute for Integrated Circuits IIS, we are developing SMART Integrated Electronic Sensors (SMARTIES) to quantify atmospheric transport and mixing through many neutrally buoyant and biocompatible floaters.
  • 01 FEB 01 FEB
    This postdoc position consists on an experimental study of highly unsteady and inhomogeneous particle-laden flows, a problem at the heart of virus transmission and climate change predictions. For such aim, we propose a series of innovative experiments on the gravitational settling and spatial segregation of particles carried by unsteady and inhomogeneous turbulent flows. The project will provide a description of the pulsed jet (on single and multi-phase conditions), including realistic situations such as laryngeal-like jets and time-dependent particle inertia caused by phase transitions. The proposed experiments start from canonical conditions but progressively increase in complexity in a controlled way.
  • 01 FEB 01 FEB
    The Department of Engineering at Reykjavik University is looking for a Post Doctoral fellow to work on the project “Wind Power Installations in Harsh Environments; an experimental study”.
  • 01 FEB 01 FEB
    The mechanical engineering department of the LISN lab invites applications for a one-yearpostdoctorate position to conduct cutting-edge research at the intersection of turbulent naturalconvection, convolutional neural networks (CNN), physics-informed machine learning, and high-performance computing (HPC). The successful candidate will work on advancing the field of super-resolution analysis for turbulent fluid flows using innovative approaches based on numerical andexperimental ombroscopy techniques.
  • 01 APR 01 APR
    The ForWind – Center for Wind Energy Research, Institute of Physics at the University of Oldenburg, jointly with Siemens Gamesa, invites applications for a PhD position (m/f/d)in the “Model Development for the Atmospheric Boundary Layer” as a part of the AptWind Marie Skłodowska-Curie Doctoral Network. The PhD candidate will be employed 50 % of the time (envisaged period: April 2023-September 2024) at the University of Oldenburg in Germany and 50 % (envisaged period: October 2024-March 2026) at Siemens Gamesa in Den Haag/The Hague, The Netherlands.
  • 01 APR 01 APR
    Trends such as larger wind farms and larger wind turbine rotors require high fidelity models such as large-eddy simulation (LES) to predict and understand the underlying aerodynamic and meteorological phenomena. Within this PhD project you will be part of a research group that focuses on fluid mechanics of individual wind turbines and wind farms. The project is concerned with the development of new modelling capabilities of an established numerical model.
  • 01 MAY 01 MAY
    The Department of Engineering at Reykjavik University is looking for a PhD student to work on the project “Wind Power Installations in Harsh Environments; an experimental study”.
  • 01 MAY 01 NOV
    L’originalité de ce travail consiste à passer de l’échelle laboratoire où différentsessais ont été menés pour caractériser l’érosion à une grande échelle sur laquelledifférentes études de terrain sont menées dans le cas de la thèse en cours surl’étude du transport sédimentaire en milieu instationnaire. L’objectif du postdoctorant sera de paramétrer les lois d’érosion et de transport en reproduisant lesexpériences laboratoire par des simulations numériques pour pouvoir ensuitealimenter des simulations numériques à plus grande échelle, réalisées avecTélémac.
  • 01 JUL 01 JUL
    The post holder will work at the Department of Low Temperature Physics, within a project focusing on the experimental study of wall-bounded flows of liquid helium-4.
  • 01 SEP 31 AUG
    We are looking a postdoctoral researcher to work on the dynamics of quantum vortices in rotating superfluid helium in the framework the ANR QuantumVIW by joining the group in Nice. The QuantumVIW project aims at providing numerical and theoretical support to the experiment CryoLEM at LEGI Grenoble. This unique experiment is able to produce and visualise in real time a stable vortex lattice in rotating superfluid helium. The successful applicant is expected to perform numerical simulations of the self-consistent model FOUCAULT (and other related superfluid models), to develop analytical theories and strongly interact with all partners of the ANR QuantumVIW