This chapter discusses the general multiphase models that are available in Ansys Fluent. Introduction provides a brief introduction to multiphase modeling, Discrete Phase discusses the Lagrangian dispersed phase model, and Solidification and Melting describes Ansys Fluent’s model for solidification and melting. For information about using the general multiphase models in Ansys Fluent, see Modeling Multiphase Flows in the User's Guide. Information about the various theories behind the multiphase models is presented in the following sections:

• 14.1. Introduction
• 14.2. Choosing a General Multiphase Model
• 14.3. Volume of Fluid (VOF) Model Theory
• 14.4. Mixture Model Theory
• 14.5. Eulerian Model Theory
• 14.6. Wet Steam Model Theory
• 14.7. Modeling Mass Transfer in Multiphase Flows
• 14.8. Modeling Species Transport in Multiphase Flows
• 14.9. Population Balance Model