Modeling with Multiphysics Couplings
Using the predefined multiphysics couplings has many advantages. It improves the flexibility and enables sequential modeling, increasing the complexity of a model step by step. Care is also taken to make the correct couplings both on the physics level but also from a numerics point of view. It is of course possible to couple physics manually and this is maybe also necessary in some cases when more advanced and exotic couplings are necessary.
The predefined multiphysics coupling approach used improves the flexibility and design options for your modeling. For for details, see The Multiphysics Node and Multiphysics Modeling Approaches in the COMSOL Multiphysics Reference Manual.
In this section a few tips and tricks for modeling acoustics and vibration problems using the multiphysics couplings are presented.
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Use Selections
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The Override Behavior
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The Solvers
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Perfectly Matched Layers (PMLs)