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Title:
Mesh-refined P3M - A fast adaptive N-body algorithm
Authors:
Couchman, H. M. P.
Affiliation:
AA(Toronto, University, Canada)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 368, Feb. 20, 1991, p. L23-L26. Research supported by NSERC. (ApJ Homepage)
Publication Date:
02/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COMPUTATIONAL ASTROPHYSICS, COMPUTATIONAL GRIDS, GALACTIC CLUSTERS, MANY BODY PROBLEM, PARTICLE DENSITY (CONCENTRATION), ALGORITHMS, FOURIER TRANSFORMATION
DOI:
10.1086/185939
Bibliographic Code:
1991ApJ...368L..23C

Abstract

Substantial improvements in the performance of 'particle-particle-particle-mesh' (P3M) algorithms may be achieved by allowing spatially adaptive mesh refinements in regions of high particle density. The cycle time under heavy clustering is about five times that for a uniform particle distribution: about 10-20 times faster than conventional P3M. The algorithm is roughly 50 percent faster than a 'tree code' while requiring significantly less memory.

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