## 1.2. Physical Models

When you set up a simulation, you must select which physical models to include. The physical models define the type of simulation you want to perform.

Currently in CFX, the following models are available:

- Steady State and Transient Flows

- Mesh Deformation

- Laminar Flow

- Turbulence and Turbulence Models

- Heat Transfer

- Conjugate Heat Transfer

- Compressible Flow

- Setting a Reference Pressure

- Buoyancy

- Immersed Solids

- Multicomponent Flow

- Equilibrium Phase Change Model

- Additional Variables

- Non-Newtonian Flow

- Coordinate Frames

- Rotating Frames of Reference (RFR)

- Sources

In addition to these models, you can also introduce volumetric sources of mass, momentum energy, resistance, and Additional Variables using fluid subdomains. Point sources can also be applied to a single control volume. For details, see Point Sources.

Descriptions of more advanced physical models and how the basic models extend to more complex cases are provided in:

- Boundary Condition Modeling

- Initial Condition Modeling

- Turbulence and Near-Wall Modeling

- Domain Interface Modeling

- Multiphase Flow Modeling

- Particle Transport Modeling

- Combustion Modeling

- Radiation Modeling

- Real Fluid Properties

- Coupling CFX to an External Solver: ANSYS Multi-field Simulations

Release 18.2 - © ANSYS, Inc. All rights reserved.