This chapter describes the Ansys Fluent solver theory. Details about the solver algorithms used by Ansys Fluent are provided in Overview of Flow Solvers – Multigrid Method. For more information about using the solver, see Using the Solver in the User's Guide.

• 23.1. Overview of Flow Solvers
• 23.2. General Scalar Transport Equation: Discretization and Solution
• 23.3. Discretization
• 23.4. Pressure-Based Solver
• 23.5. Density-Based Solver
• 23.6. Pseudo Time Method Under-Relaxation
• 23.7. Multigrid Method
• 23.8. Hybrid Initialization
• 23.9. Full Multigrid (FMG) Initialization