Physical models for bubbling behaviour in fluidized beds with BDIM

A numerical scheme based on Boundary Domain Integral Method (BDIM) is being developed to model the bubbling behaviour of fluidized beds by using the E ulerian approach. Each phase is described by a modified Navier-Stokes equat ion. While modified Helmholtz fundamental solution has been used for the ki nematics, the elliptic diffusion-convective one has been used for the kinet ics of the both components motion. A gas-phase is described by its physical properties, but the solid-phase needs additional physical models. The most promising set of the equations in the sense of fast numerical convergence is presented in present work.