Abstract
We present the development of a non-reflecting boundary condition, based on the Local One-Dimensional Inviscid (LODI) approach, for Lattice Boltzmann Models working with multi-speed stencils. We test and evaluate the LODI implementation with numerical benchmarks, showing significant accuracy gains with respect to the results produced by a simple zero-gradient condition. We also implement a simplified approach, which allows handling the unknown distribution functions spanning several layers of nodes in a unified way, still preserving a comparable level of accuracy with respect to the standard formulation.
Original language | English |
---|---|
Pages (from-to) | 101-117 |
Number of pages | 17 |
Journal | Communications in Computational Physics |
Volume | 33 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2023 |
Keywords
- Characteristic boundary condition
- lattice Boltzmann method
- local one-dimensional inviscid boundary conditions
- multispeed high order models
- non-reflective boundary conditions