A simple and efficient solver for self-gravity in the DISPATCH astrophysical simulation framework

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Abstract

We describe a simple and effective algorithm for solving Poisson's equation in the context of self-gravity within the DISPATCH astrophysical fluid framework. The algorithm leverages the fact that DISPATCH stores multiple time slices and uses asynchronous time-stepping to produce a scheme that does not require any explicit global communication or sub-cycling, only the normal, local communication between patches and the iterative solution to Poisson's equation. We demonstrate that the implementation is suitable for both collections of patches of a single resolution and for hierarchies of adaptively resolved patches. Benchmarks are presented that demonstrate the accuracy, effectiveness and efficiency of the scheme.

Original languageEnglish
Title of host publicationJournal of Physics: Conference Series
Number of pages11
Volume1031
Publication date1 Jun 2018
Chapter012021
DOIs
Publication statusPublished - 1 Jun 2018
SeriesJournal of Physics: Conference Series
ISSN1742-6588

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