Literatura científica selecionada sobre o tema "Semi-lagrangienne"
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Teses / dissertações sobre o assunto "Semi-lagrangienne"
Huot, Fabien. "Simulation numérique de l'interaction laser à haut flux - plasma par méthode semi-lagrangienne". Nancy 1, 2002. http://www.theses.fr/2002NAN10053.
Texto completo da fonteAlbrecht-Marc, Michel. "Etude cinétique de l'instabilité Raman en plasma inhomogène par simulation numérique Vlasov semi-lagrangienne". Nancy 1, 2005. http://www.theses.fr/2005NAN10125.
Texto completo da fonteIn the field of ICF, this thesis is about the numerical simulation of Raman instability through optical mixing. We used a semi-lagrangian Vlasov-Maxwell code allowing a fine description in phase space of the effects this type of plasma exhibits (likely to occur in future machines LMJ and NIF). We showed, both in homogeneous and inhomogeneous profiles, the effect of the convectively amplified probe wave, inducing weak turbulence in the plasma. It is associated with a nonlinear shift in frequency and wavevector of scattered modes, due to kinetic effects. This is preparing the plasma. Moreover, both forward Raman or Brillouin scatterings were taken into account. Therefore, we have been able to detect in various conditions low frequency (below the plasma frequency) electronic modes (KEEN) appearing through parametric coupling with other waves already in the plasma
Djoumna, Georges. "Méthodes d'interpolation dans la résolution semi-lagrangienne par éléments finis, des équations de Saint-Venant". Thesis, Université Laval, 2006. http://www.theses.ulaval.ca/2006/23704/23704.pdf.
Texto completo da fonteMoto, Mpong Serge. "Etude rhéologique et simulation numérique de l'injection d'un alliage d'aluminium à l'état semi-solide". Phd thesis, École Nationale Supérieure des Mines de Paris, 2002. http://pastel.archives-ouvertes.fr/pastel-00001341.
Texto completo da fonteGOSPODINOV, ILIAN. "La methode semi-lagrangienne a deux pas de temps appliquee a un modele de prevision atmospherique : amelioration de la conservation et de la stabilite". Toulouse 3, 2000. http://www.theses.fr/2000TOU30160.
Texto completo da fonteSalmon, Stéphanie. "Contribution aux méthodes numériques pour la simulation d'écoulements de fluides, d'électromagnétisme et de physique des plasmas". Habilitation à diriger des recherches, Université Louis Pasteur - Strasbourg I, 2008. http://tel.archives-ouvertes.fr/tel-00340299.
Texto completo da fonteBarsamian, Yann. "Pic-Vert : une implémentation de la méthode particulaire pour architectures multi-coeurs". Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAD039/document.
Texto completo da fonteIn this thesis, we are interested in solving the Vlasov–Poisson system of equations (useful in the domain of plasma physics, for example within the ITER project), thanks to classical Particle-in-Cell (PIC) and semi-Lagrangian methods. The main contribution of our thesis is an efficient implementation of the PIC method on multi-core architectures, written in C, called Pic-Vert. Our implementation (a) achieves close-to-minimal number of memory transfers with the main memory, (b) exploits SIMD instructions for numerical computations, and (c) exhibits a high degree of shared memory parallelism. To put our work in perspective with respect to the state-of-the-art, we propose a metric to compare the efficiency of different PIC implementations when using different multi-core architectures. Our implementation is 3 times faster than other recent implementations on the same architecture (Intel Haswell)
Filbet, Francis. "Contribution à l'analyse et la simulation numérique de l'équation de Vlasov". Nancy 1, 2001. http://docnum.univ-lorraine.fr/public/SCD_T_2001_0068_FILBET.pdf.
Texto completo da fonteBetar, Homam. "Kinetic Effects in Magnetic Reconnection". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0043.
Texto completo da fontePlasmas are gaseous systems of ions and electrons which interact via electromagnetic fields and display collective properties. Among these, is the notion of the magnetic line "connection". This expresses the fact that, in regimes in which charged particles spiral sufficiently fast along lines of magnetic induction, the latter is linked to the bulk plasma motion and acquire a topological identity which forbids them to break, intersect and reconnect. This topological identity, however, can be locally violated thanks to a number of kinetic effects, such as particle collisions, when the currents in the plasma are sufficiently intense: one speaks of "magnetic reconnection". Magnetic reconnection is an important ingredient of the plasma self-organization and has significance for both space and laboratory plasmas since it is at the basis of natural phenomena like solar flares and polar lights, or of disruptive processes in thermonuclear fusion experiments. A long-standing problem in the study of laboratory and astrophysical plasmas is to understand the mechanisms of acceleration of electrons and ions, as a magnetic field reconnect and release energy. In this work, we studied kinetic effects on reconnection instabilities developing spontaneously in static current sheets (tearing modes) and in combination with a class of kinetic instabilities (Weibel instabilities) that are relevant both to astrophysical plasma jets and to laser-plasma interaction experiments. We performed this study using reduced-fluid and kinetic models and we investigated the competition between tearing-type modes and Weibel-type instabilities by means of both semi-lagrangian full kinetic Vlasov-Maxwell simulations and particles in cell simulations
Yahiaoui, Abdelhakim. "Sur le choix des produits semi-finis dans un contexte de très forte diversité". Phd thesis, Grenoble INPG, 2009. http://tel.archives-ouvertes.fr/tel-00414111.
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