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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, Eric Sonnendrucker, Guillaume Latu
- 2007

This work is devoted to the numerical simulation of the Vlasov equation using a phase space grid. In contrast with Particle In 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)

- Y. Sarazin, V. Grandgirard, +9 authors E. Violard
- 2006

The impact of large scale flows on turbulent transport in magnetized plasmas is explored by means of various kinetic models. Zonal flows are found to lead to a non-linear upshift of turbulent transport in a 3D kinetic model for interchange turbulence. Such a transition is absent from fluid simulations, performed with the same numerical tool, which also… (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)

- 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 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 Particle-In-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)

- Stéphane Genaud, Pierre Gançarski, Guillaume Latu, Alexandre Blansché, Choopan Rattanapoka, Damien Vouriot
- The Journal of Supercomputing
- 2008

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

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)