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36 Mois

CDD Doctorant : Influence de la Navigation FLUviale sur l’Environnement - Étude numérique et expérimentale des ondes de batillage de leurs impacts sur les berges

Annonce 2023-001-NM-DFTC A l’Université de Poitiers, au sein du Laboratoire Pprime – UPR3346, cette offre d’étude doctorale entre dans le cadre du projet INFLUE, Influence de la Navigation FLUviale sur l’Environnement, financé par l’ANR, l’Agence Nationale pour la Recherche, dans lequel 5 partenaires sont engagés : l’Institut PPRIME (CNRS-Université de Poitiers), le laboratoire Roberval (Université Technologique de Compiègne), le CEREMA, l’Établissement Public Territorial des Bassins Saône et Doubs et VNF (Voie Navigable de France).
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3 years, from October 2024

MODIFIED ISPH METHOD FOR MODELING THE WAVES INTERACTION WITH THE COASTAL PROTECTION STRUCTURES

Coastalization refers to the dual process of increasing attractiveness of the coastline and the transformation of coastlines due to the intensification of human presence and activities, observable since the 1970s. Coastal erosion and submersion are risks associated with coastalization. To protect the coastline, defense structures have been built at high costs...
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36 months

PhD proposal 2025 : Experimental fluid mechanics and acoustics - Oscillating flows

Applicants are invited for a 3-year Ph.D. studentship in Pprime laboratory at the University of Poitiers. The successful candidate will have the opportunity to work within a research team of an ANR-funded project, named ImClean, willing to improve the performance of thermoacoustic refrigerators. These offer a green alternative to conventional refrigeration systems as they use environmentally friendly gases. Besides their simple construction, they include less mechanical moving parts and hence require less maintenance. However, their performance is impacted by several non-linear phenomena such as streaming, natural convection, transition to turbulence. Both understanding and quantifying the effects of these non-linear phenomena on performance are vital for designing more performant refrigerators. This PhD Project focuses on quantifying the effects of both the transition to turbulence of oscillating flow and flow discontinuities on acoustic energy losses.
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36 months

PhD Thesis 2025 : Numerical simulations of acoustic liners in turbulent wall-bounded flows

A significant part of the noise emitted by airplanes comes from the engines, and more particularly from the fan. To reduce this noise, sound absorbing materials (acoustic liners) made of wall cavities are used. The high speed turbulent grazing flow in the engine interacts with the acoustic liner, modifying its acoustic properties on one hand, and increasing the drag on the other. In this PhD thesis, high fidelity numerical simulations will be performed with code AVBP to elucidate the physics involved in this interaction.
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