A multiphase flow containing dispersed particles may be modeled
using either the particle transport (```
Lagrangian Particle
Tracking
```

) model or the `Eulerian-Eulerian`

multiphase model. Some advantages and disadvantages of the `Eulerian-Eulerian`

multiphase model are given below to
aid in the choice of model. The equivalent section for the particle
transport model is available in *Particle Transport Versus Eulerian-Eulerian Multiphase*.

**Table 7.1: Eulerian-Eulerian Multiphase vs. Particle Transport**

Advantages of Eulerian-Eulerian Multiphase | Disadvantages of Eulerian-Eulerian Multiphase |
---|---|

Complete global information for the particle phase is available | Expensive if many sets of equations are used; that is, if there
are many particle sizes. However, the homogeneous MUSIG model is an |

Applicable for wide range of volume fractions | Knowledge of the diffusion coefficients is incomplete |

Relatively cheap for one additional set of equations | Difficult to get accuracy over a range of particle sizes for combustive flows |

Turbulence is included automatically | When there is phase change, the particle diameter must be user-specified rather than calculated automatically by the model. This can decrease accuracy. (The droplet condensation model is an exception.) |