[Todos] Oferta posdoc

[Gabi Pasquini]

> Hola,
>
> Podrian difurndirlo en el Depto de Fisica?
> Gracias,
>
> Adriana
>
>
> ==========================================
> Postdoctoral Position
> Collective effects in particle laden turbulent flows
> L.E.G.I. - Université Joseph Fourier (Grenoble, France)
> ==========================================
>
> A postodoctoral position focusing on the turbulent transport of
> particles is available in the
> Laboratoire des Ecoulements Geophysiques et Industriels (LEGI),
> Grenoble (France). The application form can be downloaded at :
>
> https://www2.cnrs.fr/DRH/post-docs07/?pid=1&action=view&id=636&lang=en
>
> . Description of the project :
> Turbulent flows laden particles (solids, bubbles, droplets) play an
> important role in various situations connected with industry (mixers,
> combustion chambers.) as well as with environment (atmospheric
> dispersion of pollutants, clouds physics, sediment transport.). In
> this context, reliable models are still lacking in order to
> accurately predict and/or control the spatial distribution of the
> dispersed phase. Industrial stakes concern the improvement the
> systems efficiency. In natural systems, important issues are related
> to pollution control, climate predictions, sediment transport, among
> others. A better understanding of such two-phase flows dynamics is a
> real challenge with a large potential impact.
> The present project pursues this goal by a deep and systematic
> experimental investigation of the coupling between transported
> particles and the surrounding carrier turbulent flow. Our group is
> presently studying the dynamics of single, isolated particles
> transported in a turbulent flow, focusing more specifically on the
> role played by the size of the inclusion and the fluid to particle
> density ratio. An acoustic Lagrangian technique (on which our group
> has a strong expertise) has been implemented to track particles in a
> wind tunnel grid generated turbulence.
> The present post-doctoral project aims to extend this study to a
> cloud of particles. In such a situation a subtler coupling arises
> between the particles and the carrier flow, leading to collective
> effects influenced by the global and local particles concentration.
> One of the main goals is to characterize the particle clustering
> (resulting from inertial effects) and to determine how the particles
> dynamics, and in particular their dispersion, evolves depending on
> their local environment. The post-doc will participate to the
> development of imaging techniques coupled to the existing Lagrangian
> technique in order to access new classes of relevant conditioned
> information (such as statistics conditioned to the local seeding
> density along their trajectory). Such refined data will contribute to
> improve Eulerian two-fluid models.
> This project is supported by the "Centre Henri-Bénard" related with
> ERCOFTAC, and will contribute to develop the collaborations between
> the LEGI (Grenoble) and the ENSL and the LMFA (Lyon). The post-doc
> will also partcipate to the french « GDR Turbulence » meetings.
>
> . Candidate profil
> The candidate must have solid background in fluid mechanics.
> Knowledge in turbulence and/or dispersed flow modeling would be
> helpful (but they are not mandatory since they could be improved/
> acquired during the course of the project). As the research project
> includes experiments as well as developments in advanced measuring
> techniques, skills in imaging techniques and signal processing would
> be appreciated.
>
> . Duration of project
> 1 year (renewable)
> beginning by the end of 2007.
>
> . Salary
> 2500 euros (before taxes)
>
> . Laboratory of project
> UMR 5519
> Alpes (11)
> Laboratoire des Écoulements Géophysiques et Industriels
> Grenoble
>
> . Contact before April 30th
> Mickael Bourgoin
> +33 4 76 82 50 46
> mickael.bourgoin en hmg.inpg.fr
>
>
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