The Multiphysics Node
The Multiphysics node () contains, or has available, any coupled physics features that are likely to be used for a particular set of physics interfaces added to the Model Builder. See Figure 3-14. There are no settings required for the node itself.
There are different approaches to the use of the multiphysics coupling feature. It is either predefined when you add a specific physics interface or it is automatically added when the software recognizes there is a logical coupling inherent in the model design. When it is added as part of a predefined coupling, the coupling features are also included under the Multiphysics node. Otherwise, all relevant coupling features are available from the context menu. Additional functionality is also based on the add-on modules.
Predefined multiphysics interfaces provide you with a quick entry point for common multiphysics applications. You can create the same couplings using any of the other methods for multiphysics modeling, and you can continue to add, modify, disable, and remove physics features or interfaces in a model when you start using one of the predefined multiphysics interfaces. If instead you decide to add physics interfaces sequentially, this approach is also useful as you can verify that each type of physics or equation gives the expected results before adding more complexity to the model by adding another physics interface, physics feature, or coupling fields.
For this version of COMSOL Multiphysics, and depending on the add-on module that you are using, some multiphysics interfaces are not converted to using a predefined multiphysics coupling approach.
For links to more information about the add-on modules and the multiphysics interfaces available go to www.comsol.com/comsol-multiphysics.