## 8.2. Particle Transport Versus Eulerian-Eulerian Multiphase

A multiphase flow containing dispersed particles may be modeled using either the particle transport model or the `Eulerian-Eulerian` multiphase model. Some advantages and disadvantages of the particle transport model are given below to aid in the choice of models. The equivalent section for the `Eulerian-Eulerian` multiphase model is available in Eulerian-Eulerian Multiphase Versus Particle Transport.

Table 8.1: Advantages and Disadvantages of Particle Transport

Advantages | Disadvantages
--- | ---
Complete information on behavior and residence time of individual particles is available. | Expensive if a large number of particles have to be tracked.
Relatively cheaper for wide range of particle sizes. | Very expensive to include turbulence.
Better detail for mass and heat transfer. | Essentially only possible as a post-process for a large number of particles.
More flexible when there is a significant size distribution leading to different particle velocities. (In `Eulerian-Eulerian` Multiphase, a momentum equation must be solved for each representative size which becomes very expensive.) | Restricted to low particle volume fractions.

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