Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

The prediction of solid-liquid flow in a pipe is of significance for a variety of industrial processes. Since the physical phenomena in such processes appear on widely differing length- and time-scales, many CFD methods are not quite cost-effective. The Euler-Euler multiphase approach makes it feasible to simulate such flows with reasonable computation time. The main challenge of this approach lies in the modeling of the interfacial momentum exchange between the phases, since the interface is not resolved. In this paper, a baseline model is validated that describes the interfacial forces (drag, virtual mass, (shear-) lift, wall (-lift), and turbulent dispersion) between solid particles and a liquid. This model is validated against experimental data of positively and negatively buoyant particles in a vertical pipe flow from the literature. The results show a reasonable agreement with the experimental data, except for the solid volume fraction distribution in the negatively buoyant particle cases. Possible reasons for this are discussed.