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- Rached Abdelkhalek, Henri Calandra, Olivier Coulaud, Jean Roman, Guillaume Latu
- 2009 International Conference on High Performance…
- 2009

We have designed a fast parallel simulator that solves the acoustic wave equation on a GPU cluster. Solving the acoustic wave equation in an oil exploration industrial context aims at speeding up seismic modeling and Reverse Time Migration. We consider a finite difference approach on a regular mesh, in both 2D and 3D cases. The acoustic wave equation is… (More)

- Nicolas Crouseilles, Guillaume Latu, Eric Sonnendrücker
- J. Comput. Physics
- 2009

A method for computing the numerical solution of Vlasov type equations on massively parallel computers is presented. In contrast with Particle In Cell methods which are known to be noisy, the method is based on a semi-Lagrangian algorithm that approaches the Vlasov equation on a grid of phase space. As this kind of method requires a huge computational… (More)

- Nicolas Crouseilles, Guillaume Latu, Eric Sonnendrücker
- Applied Mathematics and Computer Science
- 2007

This work is devoted to the numerical simulation of the Vlasov equation using a phase space grid. In contrast to ParticleIn-Cell (PIC) methods, which are known to be noisy, we propose a semi-Lagrangian-type method to discretize the Vlasov equation in the two-dimensional phase space. As this kind of method requires a huge computational effort, one has to… (More)

- G. Latu, V. Grandgirard
- 2011

This report shows some performance results of the Quasineutraliy Poisson solver used in the GYSELA code. The numerical schemes of this Poisson solver is explained, and the computation and communication steps on a parallel machine are described. Benchmarks shows several time measurement from 32 cores to 4096 cores. Present bottlenecks and problems of the… (More)

- Fabien Rozar, Guillaume Latu, Jean Roman
- PPAM
- 2013

The purpose of this work is simulation of magnetised plasmas in the ITER project framework. In this context, Vlasov-Poisson like models are used to simulate core turbulence in the tokamak in a toroidal geometry. This leads to heavy simulation because a 6D dimensional problem has to be solved, 3D in space and 3D in velocity. The model is reduced to a 5D… (More)

- Matthieu Haefele, Guillaume Latu, Michael Gutnic
- 2005 International Conference on Parallel…
- 2005

The authors are interested in solving the Vlasov equation used to describe collective effects in plasmas. This nonlinear partial differential equation coupled with Maxwell equation describes the time evolution of the particle distribution in phase space. The numerical solution of the full three-dimensional Vlasov-Maxwell system represents a considerable… (More)

- Nicolas Besse, Guillaume Latu, Alain Ghizzo, Eric Sonnendrücker, Pierre Bertrand
- J. Comput. Physics
- 2008

In this paper we present a new method for the numerical solution of the relativistic Vlasov–Maxwell system on a phase-space grid using an adaptive semi-Lagrangian method. The adaptivity is performed through a wavelet multiresolution analysis, which gives a powerful and natural refinement criterion based on the local measurement of the approximation error… (More)

- Fabien Rozar, Guillaume Latu, Jean Roman, Virginie Grandgirard
- Concurrency and Computation: Practice and…
- 2015