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 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.
| Document Type: | Article |
|---|---|
| Language: | English |
| Parent Title (English): | Computers & Mathematics with Applications |
| ISSN: | 0898-1221 |
| DOI: | https://doi.org/10.1016/j.camwa.2018.10.041 |
| Publisher: | Elsevier |
| Date of first publication: | 2018/11/09 |
| Submission status: | In Press, Corrected Proof |
| Departments, institutes and facilities: | Fachbereich Elektrotechnik, Maschinenbau, Technikjournalismus |
| Institut für Technik, Ressourcenschonung und Energieeffizienz (TREE) | |
| Dewey Decimal Classification (DDC): | 500 Naturwissenschaften und Mathematik / 510 Mathematik / 510 Mathematik |
| Entry in this database: | 2018/11/17 |
