Numerical Simulation on Superheated Steam Fluidized Bed Drying: I. Model Construction

Abstract

An unsteady axisymmetric two-dimensional mathematical model for a superheated steam fluidized bed drying process is established by using the Eulerian-Eulerian model to describe the turbulent flow of vapor and solid phases. The mathematical model consists of governing equations, a dynamic model of particles, a turbulent flow model, a drag force model, and a heat and mass transfer model. The model takes the effects of initial steam condensation and interaction of vapor and particles into account and can be used to describe the drying process and predict the distribution of various thermodynamic parameters in a normal atmosphere.

Keywords:

• Condensation
• Drag force
• Eulerian-Eulerian model
• Heat and mass transfer

ACKNOWLEDGMENTS

This research work was supported by the National Natural Science Foundation of China under Grant No. 51076163.