101 datasets found

In radioactive materials transport/storage casks, a mineral filled vinylester composite is used for neutron shielding. The shielding ability of this compound relies on...

Ce travail a comme objectif d'étudier diverses solutions pour la mise en place d'une plate-forme de simulation numérique. Celle-ci doit pouvoir rassembler plusieurs...

The present Ph.D. report deals with the time-domain modeling and simulation of the beam-wave interaction that occurs in helix traveling-wave tubes (TWTs) amplifiers....

It is well reported in the literature that the characteristics of the weld joint and the heat transfer at the solid/liquid interface are highly dependent on the fluid...

In order to increase the thermodynamic efficiency of gas turbine engines, the high-pressure turbine inlet temperature has been continually increased up to reach levels...

In order to simulate the thermoforming of a transparency, constitutive equations are proposed for the nonlinear viscoelastic behaviour of poly(methyl methacrylate)...

International audience

This thesis is dedicated to the research of specific imprints of Dark Energy in both linear and non-linear gravitational collapse processes through theoretical and...

A volume-penalization method is implemented in a tri-periodic pseudo-spectral code. The numerical scheme is studied and the method is tested and validated thanks to...

Cette étude a été réalisée dans le cadre la convention 2011 n° 2100472261 entre Ministère de l'écologie du développement durable et de l'énergie et le BRGM (action C6...

Ce travail est consacré à l'étude et à la simulation numérique des mouvements forts en champ proche dans le cas des séismes de magnitude modérée. Pour cela, nous avons...

This thesis is devoted to the dynamic fracture of functionally graded materials. More particularly, it deals with the toughness of nuclear cladding at high burnup...

This Ph.D. thesis aims to propose a numerical model for modelling the incremental forming process of a metallic thin wall short tube. This process is especially...

It is necessary to adapt existing models in order to simulate the number concentration, and correctly account for nanoparticles, in both free and confined atmospheres....

Rapid Thermal Process (RTP) is very used in the manufacturing of microelectronic components. It is a key stage like annealing, silicidation, oxidation, nitruration and...

By observing the low redshit type Ia supernovae, the mission of the SNIFS instrument is to help us to have a better knowledge and understanding of those objects. The...

Yield stress fluids have amazing mechanical properties: below a particular shear stress, called yield stress, the fluid behaves like a solid. Once the yield stress is...

The aim of this thesis was the development of new measurement techniques based on nano-indentation, adapted for difficult experimental conditions: small penetration...

International audience

The main objective of this thesis is to accelerate the solvers used for solving the pressure Poisson equation, for the simulation of low-Mach number flows on...