MULTIPHASE MODELING OF PNEUMATIC INJECTION OF POWDERS INTO LIQUID METALS.
Abstract
This paper describes some fundamental physical and mathematical modelling for flow regime characterization, prediction of gas-particle-liquid jet penetration depths and prediction of the momentum and heat transfer in the rising three-phase plume. Extensive use has been made of multi-phase fluid dynamics to understand the physics behind injection into water and liquid lead. A reasonably consistent picture of injection phenomena has emerged which was applied to a number of industrial situations. The author shows that it is now possible to predict with reasonable certainty the regime of flow for any powder injection encountered industrially on the basis of physical and multi-phase fluid dynamic modelling and to predict particle and gas residence times. This information can be used to suggest guidelines for process design.