Validación de la simulación numérica del flujo bifásico hidrodinámico en sistemas de lecho fluido

Abstract

This rresearch work aims to improve the validation process of two-phase flow numerical simulations, of the fluid bed characteristic transport, through the formulation and development of a combined numerical model Finite Volumes and Finite Element methods. The simulation process, inicially, was performed by COMSOL software and the obtained results showed higher accuracy compare with Discrete Element Method implemented by MFIX. The fundamental problem of bed fluid mathematical modeling phenomenon is the domain irregularity, the coupling variables in space and nonlinearity. In this research conservative equations are formulated, such as, to produce a variational equivalent and numerically solvable problem. A state equation based on the hydrodynamic pressure and the volume fraction of solids is defined. The system was decoupled into three sub-problems, ensuring the solution existence of general problem. A comparison of obtained results showed that the model developed in this article, check more effectively optimal mixing conditions, based on the quality of bubbling and mixing speed.