STABILITY ANALYSIS OF A CAISSON UNDER BREAKING WAVE BY MEANS OF A GRADUAL APPROACH
STABILITY ANALYSIS OF A CAISSON UNDER BREAKING WAVE BY MEANS OF A GRADUAL APPROACH
On drop aerobreakup in the shear induced entrainment regime
The current work examines drop aerobreakup in the shear induced entrainment (SIE) regime. To this purpose, fragment size distributions measured in two different shock tube experiments are analyzed for Weber numbers ranging from approximately 150 to 2300. It appears that the fragments’ number and volume size distributions may be normalized by the me...
Exploiting Global Digital Image Correlation for Crack Initiation
In this work, the authors propose a new methodology to detect automatically crack initiation on the surface of a metallic structure that is initially crack free, independently of the type of material or loading. The proposed strategy relies on the use of a global Digital Image Correlation algorithm based on total variation in order to estimate, fir...
Mechanisms Leading to Stabilization and Incomplete Combustion in Lean CH4/H2 Swirling Wall-Impinging Flames
In gas turbines, confined highly turbulent flames unavoidably propagate in the vicinity of a relatively cool combustor liner, affecting both the local flame structure and global operation of the combustion system. In our recent work, we demonstrated, using simultaneous [OH]_[CH2O] planar laser-induced fluorescence (PLIF) and stereo-particle image v...
Diffraction de Laue sub-micronique à très haute résolution pour l’étude de la contrainte et de la plastification d’hétér...
Diffraction de Laue sub-micronique à très haute résolution pour l’étude de la contrainte et de la plastification d’hétérostructures fragiles HgCdTe/CdZnTe
Die Entstellung – la déformation/défiguration
L’auteur reconstruit d’abord sa découverte de la déformation/défiguration (Entstellung) comme concept central à partir de la théorie freudienne de la remémoration. Depuis le début jusqu’à la fin, Freud s’est intéressé expressément à la mémoire défaillante et lacunaire, autrement dit aux souvenirs déformés. Partant de ce constat, l’auteur arrive à l...
Simulation of diffusion with non-equilibrium vacancies, Kirkendall shift and porosity in single-phase alloys
In an alloy subject to vacancy-mediated diffusion, differences in intrinsic diffusivities tend to produce vacancy excess and deficit. These are accommodated by mechanisms such as dislocation climb and pore formation. This is of concern in high temperature alloy-coating systems used in industrial applications, as pores may develop at the interface b...
DefVolc: Interface and web service for fast computation of volcano displacement
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DefVolc is a suite of programs and a web service intended to help the rapid interpretation of InSAR data, acquired on volcanoes at an increased frequency thanks to the various dedicated satellites. Our objective is to help to rapidely inverse volcano displacements, whether these displacements result from fractures (sheet intrusions or faults) or ma...
Maillage à dominante Polycube
Cette thèse étudie les méthodes de polycubes pour la génération de maillages hexaédriques. Ces maillages, et plus généralement les maillages structurés par blocs, sont très recherchés pour effectuer des simulations numériques de phénomènes physiques (fission nucléaire, écoulement, aérospatiale…). Or, il n’existe pas de méthode industriellement viab...
Effect of Compressive Creep and Hydrostatic Pressure on Diffusion in NiCr and NiSi Systems
Interdiffusion coefficients were measured in NiSi and NiCr systems from diffusion couples under hydrostatic pressures between 50 and 326 MPa, at 1200 °C. Uniaxial compression creep tests were also carried out on Ni–Cr diffusion couples at 885 °C, 940 °C and 1000 °C with stress values between 0 and 25 MPa, to observe the effect of applied stress on ...
