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LANS Informal Seminar: Jed Brown
September 10, 2013 @ 15:00 CDT
Seminar Title: Time integration and solver challenges in tokamak edge plasma simulation
Speaker: Jed Brown, Postdoctoral Appointee, MCS, Argonne National Laboratory
Date/Time: 2013-09-10 15:00
Location: Bldg. 240, Rm. 4301
Description:
We present recent experiences integrating PETSc’s IMEX time integration and solvers for use in the tokamak edge code BOUT++. We consider challenges and bottlenecks arising in BOUT++ simulation of edge-localized modes and discuss the relative merits of time integration and solver choices from BDF, additive Runge-Kutta, Rosenbrock-W, and extrapolation methods, preconditioning approaches for stiff waves, and solvers for the strongly anisotropic systems arising in tokamak simulation.