Physics and Multiphysics Interfaces

In the Model Builder you can add physics interfaces and physics features in the Model Wizard. Depending on your license, the Model Wizard can contain different physics interfaces grouped in different physics branches. The physics interfaces shipped with COMSOL are referred to as built-in physics interfaces.

With the Physics Builder you can create new physics interfaces that show up in the Model Wizard, either in an existing physics branch or in a new physics branch.

Under each Physics Interface and Multiphysics Interface, the following can be added under Building Blocks ():

•	A feature or a link to a feature in the Features branch ().

•	A property or a link to a property in the Properties branch ().

The following can also be added:

•	A Dependent Variable Declaration for the variable used by the physics.

This node does not add a dependent variable to the physics interface, it just declares that it exists.

•	A Variable Declaration with Variable Definition as child nodes, where the definitions are expressions in terms of other declared variables. A declared variable can also be made available for plotting and results evaluation (see Variables).

•	Other nodes to define default values, equation displays, and more.

In this section:

•	Creating a Physics Interface or a Multiphysics Interface

•	Physics Interface

•	Multiphysics Interface

•	Contained Interface

•	Physics Interface Component Link

•	Auxiliary Settings (Physics Interface)

•	Disable Allowed Study Types

•

Menu

•

Menu Item