The work in this thesis falls in the category of comprehending dynamical systems relatedto thin liquid films driven by gravity; mainly shallow water models and lubrication equations.From a modeling point of view, we have derived from one hand 3-equation shallow water modelsfor Newtonian fluids with constant viscosity that describe the evolution of ...
The mechanical properties of metallic materials strongly depend on the dislocation behavior, such as the density, the distribution, the nucleation and the mobility of dislocations as well as the interactions between dislocations and grain boundaries (GB). The main objective of this thesis is to study the effects of elastic and plastic anisotropies ...
Published in Applied Geophysics
When seismic exploration is conducted in a special geological environment such as a tunnel space, the traditional imaging method in the Cartesian coordinate system cannot accurately discretize the air column in that environment. Thus, obtaining Thus, obtaining high-quality imaging results is difficult. Therefore, an elastic-wave reverse-time migrat...
DEM-VOF simulations of particle suspension dynamics in unbaffled liquid-solid stirred tanks with free surface were performed in conjunction with RSM turbulence model. The two-way coupling of particle and fluid was achieved by solving Gidaspow's drag force, non-drag force and source term in the momentum equation. The calculation of particle volume i...
DEM-VOF simulations of particle suspension dynamics in unbaffled liquid-solid stirred tanks with free surface were performed in conjunction with RSM turbulence model. The two-way coupling of particle and fluid was achieved by solving Gidaspow's drag force, non-drag force and source term in the momentum equation. The calculation of particle volume i...
ABSTRACT The traditional approach for the hydrodynamic characterization of the flow down stepped spillways is through physical modeling, which is susceptible to scale effects and has limitations related to experimental apparatus, laboratory space and the spatial discretization of data collection. Computational fluid dynamics (CFD) is an important t...
L'écoulement autour d'un objet partiellement immergé comme une carène ou une pile de pont est une configuration fondamentale au regard de la dynamique de la surface libre. La caractérisation de cet écoulement est essentielle dans des applications environnementales, ou pour des systèmes d'énergies marines renouvelables. De telles structures sont sou...
L'écoulement autour d'un objet partiellement immergé comme une carène ou une pile de pont est une configuration fondamentale au regard de la dynamique de la surface libre. La caractérisation de cet écoulement est essentielle dans des applications environnementales, ou pour des systèmes d'énergies marines renouvelables. De telles structures sont sou...
In this paper we propose a stable and robust strategy to approximate the 3d incompressible hydrostatic Euler and Navier-Stokes systems with free surface. Compared to shallow water approximation of the Navier-Stokes system, the idea is to use a Galerkin type approximation of the velocity field with piecewise constant basis functions in order to obta...
This paper is devoted to the derivation and mathematical analysis of a wave-structure interaction problem which can be reduced to a transmission problem for a Boussinesq system. Initial boundary value problems and transmission problems in dimension d= 1 for 2 × 2 hyperbolic systems are well understood. However, for many applications, and especially...
