29 citations · 89 across the 8 of their papers we have counts for
8 papers
The Landau Collision Integral in the Particle Basis in the PETSc Library
Joseph Pusztay, Filippo Zonta, Matt Knepley +1
The Landau collision integral is often considered the gold standard in the context of kinetic plasma simulation due to its conservative properties, despite challenges involved in i…
Conservative Projection Between Finite Element and Particle Bases
Joseph V. Pusztay, Matthew G. Knepley, Mark F. Adams
Particle-in-Cell (PIC) methods employ particle representations of unknown fields, but also employ continuum fields for other parts of the problem. Thus projection between particle…
Verification of a Fully Implicit Particle-in-Cell Method for the Formalism of Electromagnetic Gyrokinetics in the XGC Code
Benjamin J. Sturdevant, S. Ku, L. Chacón +8
A fully implicit particle-in-cell method for handling the -formalism of electromagnetic gyrokinetics has been implemented in XGC. By choosing the -formali…
Exascale Landau collision operator in the Cuda programming model applied to thermal quench plasmas
M. F. Adams, D. P. Brennan, M. G. Knepley +1
Collisional processes are critical in the understanding of non-Maxwellian plasmas. The Landau form of the Fokker-Planck equation is the gold standard for modeling collisions in mos…
Implementation of higher-order velocity mapping between marker particles and grid in the particle-in-cell code XGC
Albert Mollén, M. F. Adams, M. G. Knepley +2
The global total- gyrokinetic particle-in-cell code XGC, used to study transport in magnetic fusion plasmas, implements a continuum grid to perform the dissipative operations, s…
Verification of long wavelength electromagnetic modes with a gyrokinetic-fluid hybrid model in the XGC code
Robert Hager, Jianying Lang, Choong-Seock Chang +4
As an alternative option to kinetic electrons, the gyrokinetic total-f particle-in-cell (PIC) code XGC1 has been extended to the MHD/fluid type electromagnetic regime by combining…
Scalable smoothing strategies for a geometric multigrid method for the immersed boundary equations
Amneet Pal Singh Bhalla, Matthew G. Knepley, Mark F. Adams +2
The immersed boundary (IB) method is a widely used approach to simulating fluid-structure interaction (FSI). Although explicit versions of the IB method can suffer from severe time…
Conservative discretization of the Landau collision integral
Eero Hirvijoki, Mark Adams
We describe a density-, momentum-, and energy-conserving discretization of the nonlinear Landau collision integral. The method is suitable for both the finite-element and discontin…