Author(s)

YUSUKE MIZUNO, TAKUYA INOUE, SHUN TAKAHASHI & KOTA FUKUDA

Abstract

We investigated gas–particle flows by using the three-dimensional incompressible  Navier–Stokes equation with the immersed boundary method (IBM) to treat particles–wall collisions. We compared flow structures from the two-way coupled simulation with the one-way simulation that is usually used in the industrial simulation. In this study, all objectives, which are particles and walls, are defined by the level-set function for the ghost-cell method of the IBM. The proposed algorithms to represent particle–particle and particle–wall collisions are simple and stable for the coupling simulation. Moreover, flow structures obtained with the coupled simulation of the moving, colliding and rebounding particles are in good agreement with the previous numerical and experimental results. The one-way and two-way coupling simulations were carried out based on a number of particles of 50, 100 and 200, respectively. As a result, the one-way scheme indicated more frequently collisions on the particle and wall than the two-way scheme. The reason is that the one-way scheme ignored the particle–flow interactions.

Keywords

immersed boundary method, particle–wall collisions