An improved immersed boundary‐lattice Boltzmann method based on force correction technique

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. An improve force correction based immersed boundary‐L attice Boltzmann method (IBM‐LBM) is proposed for fluid‐structure interaction problems with moving boundaries in this paper. The non‐slip boundary conditions are much better enforced compared with the conventional IB‐LBMs by introducing a force coeffient. In additional, the present approach avoids the implicit and iterative calculations thus much computational cost is saved