Semi-Lagrangian lattice Boltzmann model for compressible flows on unstructured meshes
| Autor: | Mohammad Hossein Saadat, Iliya V. Karlin, Fabian Bösch |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Physical Review E Physical Review E, 101 (2) |
| ISSN: | 2470-0045 1539-3755 1063-651X 1095-3787 1550-2376 |
| DOI: | 10.1103/physreve.101.023311 |
| Popis: | Compressible lattice Boltzmann model on standard lattices [M. H. Saadat, F. Bösch, and I. V. Karlin, Phys. Rev. E 99, 013306 (2019).] is extended to deal with complex flows on unstructured grid. Semi-Lagrangian propagation [A. Krämer et al., Phys. Rev. E 95, 023305 (2017).] is performed on an unstructured second-order accurate finite-element mesh and a consistent wall boundary condition is implemented which makes it possible to simulate compressible flows over complex geometries. The model is validated through simulation of Sod shock tube, subsonic and supersonic flow over NACA0012 airfoil and shock-vortex interaction in Schardin's problem. Numerical results demonstrate that the present model on standard lattices is able to simulate compressible flows involving shock waves on unstructured meshes with good accuracy and without using any artificial dissipation or limiter. Physical Review E, 101 (2) ISSN:1539-3755 ISSN:1063-651X ISSN:1095-3787 ISSN:1550-2376 |
| Databáze: | OpenAIRE |
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