[PDF] Top 20 Polynomial Characteristics Method for Neutron Transport in 3D extruded geometries

... size for the Polynomial case, thanks to a lower amount of meshes, is smaller and the percentage of classified chords is ...the Polynomial method results higher when compared to the SC ... Voir le document complet

... Take for example the case of ‘tall’ meshes (see first axial node in ...6.5): in such configuration a trajectory will most likely cross multiple vertical surfaces before running in a horizontal ... Voir le document complet

... Characteristics based methods The method of characteristics for solving hyperbolic PDEs has been applied many times over the years to the solution of neutron transport problems ... Voir le document complet

... Decomposition Method (DDM) where the global geometry, ...split in several sub-geometries where a full multigroup source problem is ...that for a given computer architecture, we can find an ... Voir le document complet

... deterministic transport solver for nuclear core calculations to solve the steady state Boltzmann ...ordinate method to deal with the angular variable and a DGFEM to solve spatially the Boltzmann ... Voir le document complet

... Le travail réalisé pendant cette thèse peut être considéré comme divisé en trois parties: transport, accélération et autres. La première partie est constituée par l'implémentation de l'approximation polynomiale ... Voir le document complet

... fully 3D solu- tions of any model defined in plate domains whose numerical com- plexity reduces to the one characteristic of 2D ...the in-plane–out-of-plane separated representation can be only com- ... Voir le document complet

... tried in this report to give a brief bibliographic overview of the main existing moving mesh ...methods. In both approaches, the stiness of the springs or elastic material is varied locally based on mesh ... Voir le document complet

... proofs for the ideal case are then used to define some heuristics for the practical case on real datasets, where the sampling requirements are normally not ...methods in this area are the Cocone ... Voir le document complet

... as neutron reactors were operating they have been used for neutron scattering ...of neutron scattering was unraveled for magnetic studies and spectroscopic measurements dedicated ... Voir le document complet

... arising in a model of reactive solute transport in porous media, including equilibrium ...splitting method, the advection and diffusion operators are solved sepa- rately using the upwind ... Voir le document complet

... parareal in time algorithm [5, 6] on neutron diffu- sion equation that governs the time-dependent flux distribution in the reactor ...parareal in time algorithm is an iterative scheme, that ... Voir le document complet

... filling for an iron ...cost in memory and time. In this work we will follow the mathematical model introduced and treated in ...fluids. In addition, the fluids are considered ... Voir le document complet

... [7]. In a realistic system the electrodes are macroscopic and connected by an atomic sized constriction ...region. For such a system T (E) is limited by the number of channels in the narrowest part ... Voir le document complet

... approach for temporal calibration of a 3D freehand ultrasound (US) ...probe. For quantitative use, calibration is needed to correctly localize a B-scan in 4D (3D+t) ...defined in ... Voir le document complet

... ied in the early 1960s in economics [ Pareto 1964 ] and finan- cial theory [ Mandelbrot 1963 ...common in physics [ Shlesinger et ...photons in hot atomic va- pors [ Mercadier et ... Voir le document complet

... and in particular x j = x i whenever M i,j 6= ...vector in the kernel we selected must be a multiple of the vector (1, 1, ...not in the kernel since the sum of the elements on each line is not zero ... Voir le document complet

... framework for growing single-crystal semiconductor nanowires for applications spanning optoelectronic, sensor and energy-related technologies [2, ...changes in VLS growth conditions produce a ... Voir le document complet

... droplet in submerged linear cavities, of different widths , proportional to the Faraday wavelength ...remains in the deep water region and can not walk in the shallow water ... Voir le document complet

... exists in the transfer function. For the volume rendering methods, the computation burden appears in the data resample part during data ...rendering method, low rendering speed is still a ... Voir le document complet