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- W2135087643 abstract "An algorithm for simulating self-gravitating cosmological astrophysical fluids is presented. The advantages include a large dynamic range, parallelizability, high resolution per grid element, and fast execution speed. The code is based on a finite volume flux-conservative total variation diminishing (TVD) scheme for the shock-capturing hydro and an iterative multigrid solver for the gravity. The grid is a time-dependent field, whose motion is described by a generalized potential flow. Approximately constant mass per cell can be obtained, which provides all the advantages of a Lagrangian scheme. The grid deformation combined with appropriate limiting and smoothing schemes guarantees a regular and well-behaved grid geometry, in which nearest neighbor relationships remain constant. The full hydrodynamic fluid equations are implemented in the curvilinear moving grid, which allows for arbitrary fluid flow relative to the grid geometry. This combination retains all the advantages of the grid-based schemes including high speed per fluid element and a rapid gravity solver. The current implementation is described, and empirical simulation results are presented. Accurate execution speed calculations are given in terms of floating point operations per time step per grid cell. This code is freely available to the community." @default.
- W2135087643 created "2016-06-24" @default.
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- W2135087643 date "1998-03-01" @default.
- W2135087643 modified "2023-09-23" @default.
- W2135087643 title "A High‐Resolution Adaptive Moving Mesh Hydrodynamic Algorithm" @default.
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- W2135087643 doi "https://doi.org/10.1086/313074" @default.
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