Riser hydrodynamics: Simulation using kinetic theory

摘要: Computational fluid dynamics (CFD) for fluidization is reaching maturity (Roco, 1998). It has become common practice to compare time-averaged solid velocities and concentrations measurements of fluxes densities. The dynamic behavior the riser, however, not been previously compared experiments. This article shows that solids flow in riser form clusters, but particle give us core-annular regime agreement with measurements. computed which are essentially compressible gravity waves, produce major frequencies density oscillations model CFD code compute granular temperature distributions, agreeing qualitatively data. For volume fraction around 3–4%, average concentration viscosity agrees our experimental