Parallel SN sweeps on adapted meshes

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We study parallel sweeps on adaptively refined meshes. Unlike parallel sweeps on regular grids, there is not a known optimal parallel sweep on unstructured meshes and thus, multiple heuristics have been proposed over the years. In this paper, we study the CAP-PFB (Cut Arc Preference-Parallel Forward Backward) algorithm on regular grids and adaptively refined meshes. We begin by recalling the CAP-PFB heuristic, then we explain how it can be applied on adapted meshes. After that, we compare the sweeps produced by CAP-PFB when different initial sweeps are used on regular and adapted meshes. We show that on regular grids, CAP-PFB finds an optimal sweep independendy of the initial sweep. On adapted meshes, the best results are obtained when using a serial initial sweep for CAP-PFB. This is somewhat unexpected; the "worst" initial sweep leads to the best result. We conclude that a good initial sweep for CAP-PFB, on adapted meshes, should take into account the interaction of sweeps along different directions before trying to minimize the number of stages required.

Original languageEnglish
Title of host publicationMathematics and Computations, Supercomputing in Nuclear Applications and Monte Carlo International Conference, M and C+SNA+MC 2015
PublisherAmerican Nuclear Society
Pages1206-1217
Number of pages12
ISBN (Electronic)9781510808041
StatePublished - 2015
Externally publishedYes
EventMathematics and Computations, Supercomputing in Nuclear Applications and Monte Carlo International Conference, M and C+SNA+MC 2015 - Nashville, United States
Duration: Apr 19 2015Apr 23 2015

Publication series

NameMathematics and Computations, Supercomputing in Nuclear Applications and Monte Carlo International Conference, M and C+SNA+MC 2015
Volume2

Conference

ConferenceMathematics and Computations, Supercomputing in Nuclear Applications and Monte Carlo International Conference, M and C+SNA+MC 2015
Country/TerritoryUnited States
CityNashville
Period04/19/1504/23/15

Keywords

  • AMR
  • Parallel transport
  • Transport sweeps

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