[PDF] Top 20 Numerical analysis of the mixed finite element method for the neutron diffusion eigenproblem with heterogeneous coefficients

... METHOD FOR THE NEUTRON DIFFUSION EIGENPROBLEM WITH HETEROGENEOUS COEFFICIENTS ...first the convergence of the finite ... Voir le document complet

... solve the diffusion equation written in mixed form, with either a source term, or as an ...that the approximation of eigenvalue problems has been studied among others by Osborn ... Voir le document complet

... generalized finite element method in the spirit of the Localized Orthogonal Decomposition for diffusion problems with sign-changing ...nite element ... Voir le document complet

... The diffusion equation can model different physical phenomena, for instance Darcy’s law, Fick’s law or the neutron ...in the nuclear industry, the multigroup ... Voir le document complet

... each element K ∈ T h , which naturally induces a local time-stepping ...combined with an explicit time integration method and in the presence of an unstructured locally refined mesh, ... Voir le document complet

... equation with boundary damping. A class of dissipative pHs with structural and fluid damping was studied in Matignon and Hélie (2013) and Le Gorrec and Matignon (2013), while in Villegas et ...get ... Voir le document complet

... researchers the full access to material inner structures. With such ample information, employing numerical simulation on real material images becomes more and more ...especially, of ... Voir le document complet

... Cavity expansion theory is an improvement compared with bearing capacity theory, in terms of taking soil compressibility into account, simulating the penetration proc[r] ... Voir le document complet

... compare, for the two different substrate thicknesses, the localization of this extremum for the component σxx and σyy ...respectively. For the value of ... Voir le document complet

... results The previous study [21] was analytical and based on bending beam equations to evaluate the deflection and the energy of the ...initiation, the energy of the ... Voir le document complet

... circuit with low leakage flux design (c). The perturbation finite element method is an excellent tool to deal with this kind of geometrical ...aimed for allowing ... Voir le document complet

... applications The enrichment of the contact geometry by an arbitrary function permits : ...contact element ; 2. to account for a change of the local geometry due to loading ... Voir le document complet

... ontext, the bifur ation method appeared as a fairly good ompromise. On the other hand, a popular treatment of diusive uxes in porous media, fea- turing Knudsen diusion (also alled eusion), ... Voir le document complet

... contribution of the source term need to be reached. The results indicate that PGEM overestimates the exact solution (not enough diffusion), whereas the MLST solution is ... Voir le document complet

... coupled with convection-diffusion transfer in fluid ...out for translation-invariant geometries (general infinite cylinders) and unidirectional ...to the fore a new convection-diffusion operator, ... Voir le document complet

... 1. The size of the elements; 2. The maximum thickness of the part; ...3. The number of sub-grids that have to be ...to the fact that contrary to Moumnassi et ... Voir le document complet

... objective of the present study is to develop a general hybrid finite element package for predicting the dynamic behavior of isotropic spherical shells with boundary ... Voir le document complet

... 2- The extension to the onjugated Graetz problem proposed in [19, 20℄ (adding solid parts with diusion) remains heavy and ompli ated, 3- F rom a theoreti al point of view, only the ... Voir le document complet

... la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou ... Voir le document complet

... time-consuming. The simplified P N (SP N ) transport theory [11] was developed to address this ...issue. The two fundamental hypothe- ses to obtain the SP N equations are that locally, the ... Voir le document complet