16 citations · 34 across the 7 of their papers we have counts for
7 papers
Coarsening and parallelism with reduction multigrids for hyperbolic Boltzmann transport
S. Dargaville, R. P. Smedley-Stevenson, P. N. Smith +1
Reduction multigrids have recently shown good performance in hyperbolic problems without the need for Gauss-Seidel smoothers. When applied to the hyperbolic limit of the Boltzmann…
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…
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…
A comparison of element agglomeration algorithms for unstructured geometric multigrid
S. Dargaville, A. G. Buchan, R. P. Smedley-Stevenson +2
This paper compares the performance of seven different element agglomeration algorithms on unstructured triangular/tetrahedral meshes when used as part of a geometric multigrid. Fi…
Goal-based angular adaptivity for Boltzmann transport in the presence of ray-effects
S. Dargaville, R. P. Smedley-Stevenson, P. N. Smith +1
Boltzmann transport problems often involve heavy streaming, where particles propagate long distance due to the dominance of advection over particle interaction. If an insufficientl…
Angular adaptivity with spherical harmonics for Boltzmann transport
S. Dargaville, A. G. Buchan, R. P. Smedley-Stevenson +2
This paper describes an angular adaptivity algorithm for Boltzmann transport applications which uses Pn and filtered Pn expansions, allowing for different expansion orders across s…
Scalable angular adaptivity for Boltzmann transport
S. Dargaville, A. G. Buchan, R. P. Smedley-Stevenson +2
This paper describes an angular adaptivity algorithm for Boltzmann transport applications which for the first time shows evidence of scaling in both runtime and me…