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Grid Refinement for Lattice-BGK Models

✍ Scribed by Olga Filippova; Dieter Hänel

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
249 KB
Volume
147
Category
Article
ISSN
0021-9991

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✦ Synopsis

Lattice-Boltzmann models, proposed at the end of the 1980s as the noise-free version of lattice-gas models, are based on gas-kinetic representation of fluid flow. Their recent modifications, the lattice BGK models, provide especially simple, effective and stable algorithms for the solution of hydrodynamical problems. A local secondorder grid refinement scheme for the lattice-BGK model is proposed in this work. The refinement scheme and a boundary-fitting scheme for complicated geometries are applied to simulate a benchmark problem of flow past a cylinder in a channel with small and moderate Reynolds numbers.

📜 SIMILAR VOLUMES

Acceleration of Lattice-BGK Schemes with
Acceleration of Lattice-BGK Schemes with Grid Refinement
✍ Olga Filippova; Dieter Hänel 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 405 KB

The LBGK method with local grid refinement has been shown to be an efficient and accurate tool for the simulation of incompressible, viscous flows over complex geometries. In the present study, further improvement of this concept is proposed, enabling the use of smaller amount of time steps on refin