The discrete particle model (DPM) is a mesoscale method used to study the hydrodynamics
of dense dispersed flows. In this approach, the particle motion is described in a Lagrangian framework
by directly solving the Newtonian kinetic equations of each individual particle while the gas flow is
studied in an Eulerian framework. The constitutive relations for the dispersed phase are not required
because the particle-particle interactions are modeled through a two-variant collision-handling
algorithm. In this chapter a full understanding of the DPM technique is presented through a detailed
description of the numerical model and the results of its applications to gas-solid fluidization systems.
We also detail a multi-component numerical strategy developed by the authors to enhance the DPM
efficiency.
Keywords: Discrete particle model, gas-solid flow, fluidization system, numerical efficiency.
