A5043226472- Advanced Numerical Methods in Computational Mathematics
- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Numerical methods in engineering
- Advanced Numerical Analysis Techniques
- Advanced Mathematical Modeling in Engineering
- Contact Mechanics and Variational Inequalities
- Nuclear and radioactivity studies
- Computational Fluid Dynamics and Aerodynamics
- Lattice Boltzmann Simulation Studies
- Electromagnetic Simulation and Numerical Methods
- Composite Material Mechanics
- Numerical methods for differential equations
- Fusion materials and technologies
- Computational Geometry and Mesh Generation
- Adhesion, Friction, and Surface Interactions
- Matrix Theory and Algorithms
- Brake Systems and Friction Analysis
- Particle Dynamics in Fluid Flows
- Dynamics and Control of Mechanical Systems
- Nuclear Engineering Thermal-Hydraulics
- Metallurgical Processes and Thermodynamics
- Metallurgy and Material Forming
- Minerals Flotation and Separation Techniques
- Advanced Optimization Algorithms Research
CEA Cadarache
2015-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
Laboratoire de Génie des Procédés Catalytiques
2022
Direction des énergies
2011-2019
Château Gombert
2006-2008
Laboratoire de Chimie
2007
Laboratoire de Probabilités et Modèles Aléatoires
2007
Département Mathématiques et Informatique Appliquées
2005
Institut National des Sciences Appliquées Rouen Normandie
2004
Summary The model reduction of mechanical problems involving contact remains an important issue in computational solid mechanics. In this article, we propose extension the hyper‐reduction method based on a reduced integration domain to frictionless written by mixed formulation. As potential zone is naturally through mesh involved hyper‐reduced equations, dual basis chosen as restriction full‐order basis. We then obtain hybrid combining empirical modes for primal variables with finite element...
The simulation of industrial crystallizers needs the implementation multi-compartment models to handle spatial heterogeneities at lower cost. In this context study recycle streams appears as an intermediate step solve complex reactor networks. work, accelerated fixed-point algorithm is applied solution crystal size distribution and liquid phase composition in a structure including two compartments one stream. numerical strategy, formulation, acceleration method, initial condition convergence...
Abstract The aim of this paper is to derive a priori error estimates when the mesh does not fit original domain's boundary. This problematic last century (e.g. finite difference methodology) returns topical studies with huge development domain embedding, fictitious or Cartesian‐grid methods. These methods use regular structured meshes (most often Cartesian) for non‐aligned domains. Although non‐boundary‐fitted approaches become more and applied, very few are devoted theoretical estimates. In...
The major mission of the IRESNE (Research Institute on Nuclear Systems for low carbon Energy production) institute DES (Energy Division) at CEA (French Alternative Energies and Atomic Commission) is to study current future nuclear reactors integrated into low-carbon energy systems. To fulfill this mission, IRESNE's main activities rely development use advanced physical models, multiphysics tools including efficient coupling schemes, dedicated experimentation. Approaches systems using...
This paper focuses on reduced-order modeling for contact mechanics problems treated by Lagrange multipliers. The high nonlinearity of the dual solutions lead to poor classical data compression. A hyper-reduction approach based a reduced integration domain (RID) is considered. basis restriction RID full-order basis, which ensures hyper-reduced model respect non-linearity constraints. However, verification solvability condition, associated with well-posedness solution, may induce an extension...
Since a few years, fictitious domain methods have been arising for Computational Fluid Dynamics. The main idea of these consists in immersing the original physical geometrically bigger and simply-shaped other one called domain. As spatial discretization is then performed domain, simple structured meshes can be used. aim this paper to solve convection-diffusion problems with which easily simulate free-boundary possibly deformations boundary without increasing computational cost. Two...
The conversion of minor actinides to fuel starting materials for transmutation in a closed nuclear cycle is big challenge the next decades and development Gen(IV) systems. Conversion routes are numerous, but one needs prove that they can be adapted handle actinides. One them called resin process particularly attractive because it stands "dustless" as produces microspheres oxide or carbide after thermal treatment loaded resin. study presented herein focuses on experiments tests which enable...
This study is devoted to the characterization of ion exchange inside a microsphere carboxylic resin. It aims at describing kinetics this reaction which known be controlled by interdiffusion in particle. The fractional attainment equilibrium function time depends on concentration cations resin can modelized Nernst−Planck equation. A powerful approach for numerical resolution equation introduced paper. modeling based work Helfferich but involves an implicit scheme reduces computational cost....
This work focuses on the effects of inclusion proximity elastic behavior dilute matrix-inclusion composites. Rigid or soft monodisperse spherical inclusions are considered with moderate volume fractions. To conduct this study, Representative Volume Elements (RVE) an effective local minimum distance between varying sphere’s radius and one-tenth built. Numerical finite element calculations RVE performed. The obtained homogenized properties, as well phase stress moments (first second), compared...