Physics Groups and Subgroups

The Select Physics page in the Model Wizard, as well as The Add Physics Window, contain groups and subgroups of physics and mathematics interfaces (some items only display if a license includes the corresponding add-on modules).

Recently Used ()

This group contains the most recently used physics interfaces for easy access.

AC/DC ()

This group contains physics interfaces for low-frequency electromagnetics such as electrostatics and electric currents. It has the Particle Tracing subgroup, which requires the Particle Tracing Module.

Acoustics ()

This group contains acoustics-based physics interfaces. Except for the Pressure Acoustics group, these subgroups require additional licenses:

•	Acoustic-Structure Interaction

•	Aeroacoustics

•	Thermoviscous Acoustics

•	Ultrasound

•	Geometrical Acoustics

Chemical Species Transport ()

This group contains chemical species transport physics interfaces used, for example, for convection and diffusion, solving for the species concentrations and for chemical reactions. These subgroups are available depending on the specific license:

•	Reacting Flow (including an additional Turbulent Flow subgroup)

•	Reacting Flow in Porous Media

Electrochemistry ()

This group contains electrochemistry physics interfaces for modeling electrochemical components such as batteries and fuel cells. This group and its subgroups are only available with additional licenses:

•	Battery Interfaces

•	Corrosion, Deformed Geometry

•	Electrodeposition, Deformed Geometry

Fluid Flow ()

This group contains fluid flow physics interfaces such as laminar single-phase flow and, with add-on modules, multiphase flow and turbulent flow. These subgroups are available based on the license:

•	Single-Phase Flow (including additional Turbulent Flow and Rotating Machinery, Fluid Flow subgroups)

•	Thin-Film Flow

•	Multiphase Flow (including additional Bubbly Flow; Mixture Model; Euler-Euler Model; Two-Phase Flow, Level Set; Two-Phase Flow, Phase Field; Two-Phase Flow, Moving Mesh; Three-Phase Flow, Phase Field; and Rotating Machinery, Multiphase Flow subgroups)

•	Porous Media and Subsurface Flow

•	Non-Isothermal Flow (including additional Turbulent Flow and Rotating Machinery, Non-Isothermal Flow subgroups).

•	High Mach Number Flow (including an additional Turbulent Flow subgroup)

•	Rarefied Flow

•	Particle Tracing

Heat Transfer ()

This group contains physics interfaces for heat transfer in solids, fluids, pipes, and in porous media. Other physics interfaces are available for bioheat transfer and for heat and moisture transport. There are also multiphysics interfaces for thermal multiphysics applications such as Joule heating. These subgroups are available depending on the specific license:

•	Thin Structures (for heat transfer in thin shells, thin films, and fractures)

•	Conjugate Heat Transfer (including an additional Turbulent Flow subgroup)

•

Radiation

•	Electromagnetic Heating

Optics ()

This group contains physics interfaces for electromagnetic wave propagation in linear and nonlinear optical media for accurate component simulation and design optimization. This group and the subgroups are only available with additional licenses

•	Ray Optics

•	Wave Optics

Plasma ()

This group contains physics interfaces for plasma modeling. This group and the Equilibrium Discharges subgroup require the Plasma Module.

Radio Frequency ()

This group contains physics interfaces for high-frequency electromagnetic field simulations solving the full Maxwell equations. This group is only available with the RF Module.

Semiconductor ()

This group contains physics interfaces that solves Poisson’s equation for the electric potential and the drift-diffusion equations for electrons and holes in a semiconductor material. This group is only available with the Semiconductor Module.

Structural Mechanics ()

This group contains structural mechanics physics interfaces for example to study displacements and stresses in solids and for multibody dynamics, fatigue, thermal stress, piezoelectricity, and other structural multiphysics couplings.

Mathematics ()

This group contains mathematics interfaces for solving PDEs, ODEs, and DAEs, for optimization (which requires the Optimization Module) and sensitivity analysis, and for modeling moving meshes and parameterized geometry. These subgroups are available:

•	PDE Interfaces (including a Lower Dimensions subgroup)

•	ODE and DAE Interfaces

•	Optimization and Sensitivity

•	Classical PDEs

•	Deformed Mesh

•	Moving Interface (available with either the CFD Module or Microfluidics Module)

For a list of all the physics interfaces under each group and subgroup, see the individual documentation included with each add-on module. Or search the online Help for the key words Physics Interface Guide.

• Creating a New Model • Physics Interface Guide • Selecting Physics Interfaces