Eulerian and Lagrangian predictions of particulate two phase flows

Computer codes for Eulerian and Lagrangian approaches to two phase particulate flows were tested in vertical pipe flow at various particle concentrations, and for sudden expansion in a vertical pipe flow. Results show that the Lagrangian approach has advantages for predicting flows in which large particle accelerations occur. It handles particulate two phase flows consisting of polydispersed particle size distributions simply. The Eulerian approach has advantages in all flow cases where high particle concentrations occur and where the high void fraction of the flow becomes a dominating flow controlling parameter.