Applicability of the model of particles drift for the study of the disperse phase transfer in a gas flow

摘要

Two different approaches are currently available for the analysis of the behavior of the solid particles in flows. These are termed Eulerian and Langrangian. In the Lagrangian method on the trajectories of the individual size fractions are evaluated by solving time dependent ordinary differential equations. In the Eulerian approach, partial differential equations for the conservation of mass and momentum are written for each of the particles fractions, which are solved together with the equation of the liquid flow. The particles drift model is based on the algebraic slip velocity approach. In this approach the relative velocities between particles and liquid are evaluated by consideration of the forces acting on the particles. The analysis of results enable to conclude that if Kn_p < 1, Re < 1 using model of particles drift gives the error that is not exceeding 1%.