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physics.comp-ph2023
Angular adaptivity in P0 space and reduced tolerance solves for Boltzmann transport
S. Dargaville, R. P. Smedley-Stevenson, P. N. Smith +1
Previously we developed an adaptive method in angle, based on solving in Haar wavelet space with a matrix-free multigrid for Boltzmann transport problems. This method scalably mapp…
physics.comp-ph2023★ 1 cited
AIR multigrid with GMRES polynomials (AIRG) and additive preconditioners for Boltzmann transport
S. Dargaville, R. P. Smedley-Stevenson, P. N. Smith +1
We develop a reduction multigrid based on approximate ideal restriction (AIR) for use with asymmetric linear systems. We use fixed-order GMRES polynomials to approximate $A_\textrm…