抄録
Recently, the lattice Boltzmann method (LBM) that one of the numerical methods has been used computational hemodynamics, but this method is difficult to simulate in high pulsatile flow such as aorta because of a low computational stability. Consequently, this study aims at validation the regularized lattice Boltzmann method as a more stability than LBM in computational hemodynamics in high pulsatile flow. In this paper, as fundamental study, we simulate the incompressible pulsatile flow in a circular pipe, and compare result of RLBM with one of the normal LBM. In this simulation, we use the virtual flux method in order to create the circular pipe wall in Cartesian grid. As a result, we show that RLBM can capture the pulsatile flow field at the Reynolds number that is nearly twice as high as LBM's in the same grid and time resolution. In addition, RLBM's time accuracy is shown to match well with LBM's. Therefore, it is confirmed that high accuracy even in the unsteady simulation is kept.
