Lattice Boltzmann simulations on irregular grids: Introduction of the NATriuM library
The lattice Boltzmann method is a modern approach to simulate fluid flow. In its original formulation, it is restricted to regular grids, second-order discretizations, and a unity CFL number. This paper describes our new off-lattice Boltzmann solver NATriuM, an extensible and parallel C++ code to pe...
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| Veröffentlicht in: | Computers & mathematics with applications (1987) 2020-01, Vol.79 (1), p.34-54 |
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| container_title | Computers & mathematics with applications (1987) |
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| creator | Krämer, Andreas Wilde, Dominik Küllmer, Knut Reith, Dirk Foysi, Holger Joppich, Wolfgang |
| description | The lattice Boltzmann method is a modern approach to simulate fluid flow. In its original formulation, it is restricted to regular grids, second-order discretizations, and a unity CFL number. This paper describes our new off-lattice Boltzmann solver NATriuM, an extensible and parallel C++ code to perform lattice Boltzmann simulations on irregular grids. NATriuM also allows high-order spatial discretizations and non-unity CFL numbers to be used. We demonstrate how these features can efficiently decrease the number of grid points required in a simulation and thus reduce the computational time, compared to the standard lattice Boltzmann method. We detail the implementation of a recently proposed semi-Lagrangian lattice Boltzmann method and prove its efficiency in comparisons to other state-of-the-art off-lattice Boltzmann schemes. |
| doi_str_mv | 10.1016/j.camwa.2018.10.041 |
| format | Article |
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| source | Elsevier ScienceDirect Journals Complete; EZB Electronic Journals Library |
| subjects | Computational fluid dynamics Computer simulation Computing time Fluid flow High-performance computing Off-lattice Boltzmann Semi-Lagrangian Unity Unstructured grid |
| title | Lattice Boltzmann simulations on irregular grids: Introduction of the NATriuM library |
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