NUMERICAL SIMULATION OF PARTICLE-LADEN CHANNEL FLOWS WITH TWO-WAY COUPLING

摘要

A method for the numerical simulation of particle-laden flows, for both one-way and two-way coupling, is presented. The method uses an Eulerian-Lagrangian approach, with standard finite-volume one-phase flow codes and particle-tracking algorithms. For two-way coupling a semi-implicit coupling scheme was developed. The results for the large-eddy simulation of a channel flow laden with small heavy particles are presented here. The particles are transported towards the walls and tend to remain there, leading to a very high concentration of particles near the walls, and nearly uniform concentration in the rest of the channel. The main effect of the two-way coupling is to dampen the fluid-velocity uctuations and to reduce the concentration of particles near the walls.