Affiliation of Author(s):航空学院
Journal:INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
Key Words:lattice Boltzmann method mesh-free radial basis function semi-Lagrangian
Abstract:In this paper, a local radial basis function-based semi-Lagrangian lattice Boltzmann method (RBF-SL-LBM) is proposed. This is a mesh-free method that can be used for the simulation of incompressible flows. In this method, the collision step is performed locally, which is the same as in the standard LBM. In the meanwhile, the steaming step is solved in a semi-Lagrangian framework. The distribution functions at the departure points, which may be not the grid points in general, are computed by the local radial basis function interpolation. Several numerical tests are conducted to validate the present method, including the lid-driven cavity flow, the steady and unsteady flow past a circular cylinder, and the flow past an NACA0012 airfoil. The present results are in good agreement with those published in the previous literature, which demonstrates the capability of RBF-SL-LBM for the simulation of incompressible flows.
ISSN No.:0271-2091
Translation or Not:no
Date of Publication:2019-10-10
Co-author:Lin, Xingjian,Zhang, Tongwei
Correspondence Author:Wu Jie
Date of Publication:2019-10-10