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- W2075492061 abstract "We describe a parallel, cosmological N-body code based on a hybrid scheme using the particle-mesh (PM) and Barnes-Hut (BH) oct-tree algorithm. We call the algorithm GOTPM for Grid-of-Oct-Trees-Particle-Mesh. The code is parallelized using the Message Passing Interface (MPI) library and is optimized to run on Beowulf clusters as well as symmetric multi-processors. The gravitational potential is determined on a mesh using a standard PM method with particle forces determined through interpolation. The softened PM force is corrected for short range interactions using a grid of localized BH trees throughout the entire simulation volume in a completely analogous way to P$^3$M methods. This method makes no assumptions about the local density for short range force corrections and so is consistent with the results of the P$^3$M method in the limit that the treecode opening angle parameter, $theta to 0$. (abridged)" @default.
- W2075492061 created "2016-06-24" @default.
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- W2075492061 date "2004-02-01" @default.
- W2075492061 modified "2023-09-27" @default.
- W2075492061 title "GOTPM: a parallel hybrid particle-mesh treecode" @default.
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- W2075492061 doi "https://doi.org/10.1016/j.newast.2003.08.002" @default.
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