Balancing conflicting requirements for grid and particle decomposition in continuum-Lagrangian solvers

H Sitaraman, R Grout - Parallel Computing, 2016 - Elsevier
Load balancing strategies for hybrid solvers that involve grid based partial differential
equation solution coupled with particle tracking are presented in this paper. A typical …

The macro-and micro-instabilities in the pedestal region of the Tokamak

J Ma - 2015 - repositories.lib.utexas.edu
In this paper, we present the theoretical and numerical studies of the linear characteristics
and nonlinear transport features of the instabilities driven by the steep profile gradient and …

[PDF][PDF] BOUT++: Performance Characterization and Recent Advances in Design

S Farley, B Dudson, P Narayanan, LC McInnes… - nersc.gov
At each timestep, we solve the nonlinear system F (x)= 0, where F: R n→ Rn by a Newton-
Krylov method xk+ 1= xk−[F (xk)]− 1F (xk), k= 0, 1,..., where x0 is an initial approximation to …