Premium
An improved immersed boundary‐lattice Boltzmann method based on force correction technique
Author(s) -
Cai Yunan,
Li Sheng,
Lu Jianhua
Publication year - 2018
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.4484
Subject(s) - lattice boltzmann methods , immersed boundary method , boundary value problem , boundary (topology) , boundary conditions in cfd , computational fluid dynamics , slip (aerodynamics) , mathematics , mechanics , fluid–structure interaction , iterative method , physics , mathematical analysis , mathematical optimization , neumann boundary condition , finite element method , robin boundary condition , thermodynamics
Summary In this paper, an improved immersed boundary‐lattice Boltzmann method based on the force correction technique is presented for fluid‐structure interaction problems including the moving boundary interfaces. By introducing a force correction coefficient, the non‐slip boundary conditions are much better enforced compared with the conventional immersed boundary‐lattice Boltzmann methods. In addition, the implicit and iterative calculations are avoided; thus, the computational cost is reduced dramatically. Several numerical experiments are carried out to test the efficiency of the method. It is found that the method has the second‐order accuracy, and the non‐slip boundary conditions are enforced indeed. The numerical results also show that the present method is a suitable tool for fluid‐structure interaction problems involving complex moving boundaries.