Upcoming Events

Time Integration and Solver Challenges in Tokamak Edge Plasma Simulation

September 10, 2013 3:00PM to 4:00PM
Presenter 
Jed Brown (MCS), Argonne Postdoctoral Scholar
Location 
Building 240, Room 4301
Type 
Seminar
Series 
LANS Informal Seminar
Abstract:
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.