Creating a Reduced-Order Model
In order to create a reduced-order model, three studies must be present in the model:
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Time-dependent study
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Eigenvalue/eigenfrequency study
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A study that includes the Model Reduction study step.
To enable reduced-order modeling in the COMSOL Desktop, click Show Options... , then under Study, select Reduced-Order Modeling .
For a detailed description for generating a reduced-order model in COMSOL Multiphysics see the tutorial Thermal Controller, Reduced-Order Model from the COMSOL Multiphysics Application Library.
Some physics interfaces require additional modules to support eigenfrequency analysis.