Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Chacon, Luis A."'
We consider the adaptive-rank integration of general time-dependent advection-diffusion partial differential equations (PDEs) with spatially variable coefficients. We employ a standard finite-difference method for spatial discretization coupled with
Externí odkaz:
http://arxiv.org/abs/2410.19662
Autor:
Chacon, Luis, Chen, Guangye
We consider the issue of strict, fully discrete \emph{local} energy conservation for a whole class of fully implicit local-charge- and global-energy-conserving particle-in-cell (PIC) algorithms. Earlier studies demonstrated these algorithms feature s
Externí odkaz:
http://arxiv.org/abs/2410.16530
Autor:
Ahmadiniaz, Naser, Guzmán, Victor M. Banda, Edwards, James P., Lopez-Lopez, Misha A., Mata, C. Moctezuma, Chacón, Luis A. Rodriguez, Schubert, Christian, Shaisultanov, Rashid
It has been known for many years that methods inspired by string theory, such as the worldline formalism, allow one to write down integral representations that combine large numbers of Feynman diagrams of different topologies. However, to make this f
Externí odkaz:
http://arxiv.org/abs/2407.07383
Autor:
Chacon, Luis
We propose an optimally performant fully implicit algorithm for the Hall magnetohydrodynamics (HMHD) equations based on multigrid-preconditioned Jacobian-free Newton-Krylov methods. HMHD is a challenging system to solve numerically because it support
Externí odkaz:
http://arxiv.org/abs/2407.07031
Autor:
Alexandrou, Constantia, Bacchio, Simone, Constantinou, Martha, Delmar, Joseph, Finkenrath, Jacob, Kostrzewa, Bartosz, Petschlies, Marcus, Chacon, Luis Alberto Rodriguez, Spanoudes, Gregoris, Steffens, Fernanda, Urbach, Carsten, wenger, Urs
We present the full decomposition of the momentum fraction carried by quarks and gluons in the pion and the kaon. We employ three gauge ensembles generated with $N_f=2+1+1$ Wilson twisted-mass clover-improved fermions at the physical quark masses. Fo
Externí odkaz:
http://arxiv.org/abs/2405.08529
We propose a high order adaptive-rank implicit integrators for stiff time-dependent PDEs, leveraging extended Krylov subspaces to efficiently and adaptively populate low-rank solution bases. This allows for the accurate representation of solutions wi
Externí odkaz:
http://arxiv.org/abs/2404.03119
Autor:
Anderson, Steven E., Chacón, Luis, Simakov, Andrei N., Haines, Brian M., Montgomery, David S.
We report on simulations of counter-propagating laser-produced plasmas in an inertial confinement fusion (ICF) hohlraum surrogate, aiming to replicate observations reported by Le Pape et. al in recent work. The conditions of the colliding plasmas are
Externí odkaz:
http://arxiv.org/abs/2403.04967
Autor:
Ricketson, Lee, Chacón, Luis
We extend the asymptotic preserving and energy conserving time integrator for charged-particle motion developed in [Ricketson & Chac\'on, JCP, 2020] to include finite Larmor-radius (FLR) effects in the presence of electric-field length-scales compara
Externí odkaz:
http://arxiv.org/abs/2312.00730
An electrostatic, implicit particle-in-cell (PIC) model for collisionless, fully magnetized, paraxial plasma expansions in a magnetic nozzle is introduced with exact charge, energy, and magnetic moment conservation properties. The approach is adaptiv
Externí odkaz:
http://arxiv.org/abs/2305.07146
Autor:
Chen, Guangye, Chacón, Luis
We introduce a new electrostatic particle-in-cell algorithm capable of using large timesteps compared to particle gyro-period under a uniform external magnetic field. The algorithm extends earlier electrostatic fully implicit PIC implementations with
Externí odkaz:
http://arxiv.org/abs/2205.09187