Search Results - "Hirstoaga, Sever A."

A parareal algorithm for a highly oscillating Vlasov-Poisson system with reduced models for the coarse solving by Grigori, Laura, Hirstoaga, Sever A., Salomon, Julien

“…In this paper, we introduce a new strategy for solving highly oscillatory two-dimensional Vlasov-Poisson systems by means of a specific version of the parareal…”
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Reduced model-based parareal simulations of oscillatory singularly perturbed ordinary differential equations by Grigori, Laura, Hirstoaga, Sever A., Nguyen, Van-Thanh, Salomon, Julien

“…•Parareal algorithm for characteristics of Vlasov equation with strong magnetic field.•Validation of reduced models from two-scale asymptotic expansions for…”
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Optimization of particle-in-cell simulations for Vlasov-Poisson system with strong magnetic field by Chacon-Golcher, Edwin, Hirstoaga, Sever A., Lutz, Mathieu

“…We study the dynamics of charged particles under the influence of a strong magnetic field by numerically solving the Vlasov-Poisson and guiding center models…”
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Iterative selection methods for common fixed point problems by Hirstoaga, Sever A.

“…Many problems encountered in applied mathematics can be recast as the problem of selecting a particular common fixed point of a countable family of…”
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A new fully two-dimensional conservative semi-Lagrangian method: applications on polar grids, from diocotron instability to ITG turbulence by Crouseilles, Nicolas, Glanc, Pierre, Hirstoaga, Sever A., Madaule, Eric, Mehrenberger, Michel, Pétri, Jérôme

“…While developing a new semi-Lagrangian solver, the gap between a linear Landau run in 1D × 1D and a 5D gyrokinetic simulation in toroidal geometry is quite…”
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Verification of 2D × 2D and Two-Species Vlasov-Poisson Solvers by Barsamian, Yann, Bernier, Joackim, Hirstoaga, Sever A, Mehrenberger, Michel

“…In [2], 1D×1D two-species Vlasov-Poisson simulations are performed by the semi-Lagrangian method. Thanks to a classical first order dispersion analysis, we are…”
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Visco-penalization of the sum of two monotone operators by Combettes, Patrick L., Hirstoaga, Sever A.

“…A new type of approximating curve for finding a particular zero of the sum of two maximal monotone operators in a Hilbert space is investigated. This curve…”
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Multiscale Particle-in-Cell methods and comparisons for the long-time two-dimensional Vlasov–Poisson equation with strong magnetic field by Crouseilles, Nicolas, Hirstoaga, Sever A., Zhao, Xiaofei

“…We applied different kinds of multiscale methods to numerically study the long-time Vlasov–Poisson equation with a strong magnetic field. The multiscale…”
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Discrete moments models for Vlasov equations with non constant strong magnetic limit by Charles, Frédérique, Després, Bruno, Dai, Ruiyang, Hirstoaga, Sever A.

“…We describe the structure of an original application of the method of moments to the Vlasov-Poisson system with non constant strong magnetic field in three…”
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Long Time Behaviour of an Exponential Integrator for a Vlasov-Poisson System with Strong Magnetic Field by Frénod, Emmanuel, Hirstoaga, Sever A., Lutz, Mathieu, Sonnendrücker, Eric

“…With the aim of solving in a four dimensional phase space a multi-scale Vlasov-Poisson system, we propose in a Particle-In-Cell framework a robust…”
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Efficient data layouts for a three-dimensional electrostatic Particle-in-Cell code by Barsamian, Yann, Hirstoaga, Sever A., Violard, Éric

“…The Particle-in-Cell (PIC) method is a widely used tool in plasma physics. To accurately solve realistic problems, the method requires to use trillions of…”
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Verification of 2 D × 2 D and Two-Species Vlasov-Poisson Solvers by Barsamian, Yann, Bernier, Joackim, Hirstoaga, Sever A., Mehrenberger, Michel

“…In [2], 1 D ×1 D two-species Vlasov-Poisson simulations are performed by the semi-Lagrangian method. Thanks to a classical first order dispersion analysis, we…”
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Efficient Data Structures for a Hybrid Parallel and Vectorized Particle-in-Cell Code by Barsamian, Yann, Violard, Eric, Hirstoaga, Sever A.

“…The contribution of the present work relies on an innovative and judicious combination of several optimization techniques for achieving high performance when…”
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