Aerodynamique de l'ecoulement vertical de suspensions concentrees gaz-solides—I. Regimes d'ecoulement et stabilite aerodynamique

In the course of a more general study on vertical pneumatic transport catalytic reactors we have been led to investigate more particularly the aerodynamics of concentrated gas-solid suspensions at low velocities. Here we describe the various flow regimes encountered under these conditions. The prediction of choking flowrates and concentrations can be made from a mathematical model based on a single stability criterium. This model is a good agreement with our experimental results and the data of other authors.