36 mois (36 months)

PhD project : PolyAmide resistance to damage cumulation from high-pressure hydrogen cycling and fatigue loading

This PhD project, mainly experimental, focuses on PA11, a semi-crystalline thermoplastic used for the hoses of hydrogen refueling stations. The aim is to better understand the cross-dependence of two co-existing sources of damage (mechanical fatigue and repeated fast decompressions after exposure to high-pressure hydrogen) on micro-mechanisms and on their consequences on the residual mechanical properties and permeability. The PhD is part of an ANR (French National Research Agency) project. It will be prepared at Institut Pprime (Poitiers, France), in close collaboration with Hydrogenius laboratory (University of Kyushu, Japan), and will benefit from the feedback of Arkema (France and Japan) about industrial service conditions and specifications.
Sylvie CASTAGNET - Contacter
1, Avenue Clément Ader
Téléport 2
BP 40109

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12 Mois

Instability development at the interface of viscous heterocharged fluids

The proposed studies will relate to a low Reynolds laminar flow of a two-dimensional mixture layer of a highly viscous dielectric fluid. The fluid / fluid interface will be studied experimentally under different conditions. This subject is part of action 5.1 of the INTERACTIVES labex, action which concerns the manipulation of internal flow by electrical discharge and charge injection.

3 ans


We propose to numerically derive closed-loop control strategies of different flows. We will treat the numerical simulation aspects of physical mechanisms (electrodynamics and fluid mechanics) and the development of innovative control strategies (Data Driven approaches based on machine learning methods). We will study two rather emblematic types of flows: - The flow behind an obstacle (cylinder, wing profile, backward facing step). This type of strongly separated flow is particularly interesting in cases where the objective of the control is to increase aircraft stealth.