The presence of such a multiphysics node in the model will enforce the Include geometric nonlinearity option on all applicable study nodes, unless the Only use Lorentz force check box is selected.
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If it is added from the Physics ribbon (Windows users), Physics contextual toolbar (Mac and Linux users), or context menu (all users), then the first physics interface of each type in the component is selected as the default.
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If it is added automatically when the physics interface is chosen in the Model Wizard or Add Physics window, then the two participating physics interfaces are selected.
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If a physics interface is deleted and then added to the model again, then in order to reestablish the coupling, you need to choose the physics interface again from the lists. This is applicable to all multiphysics coupling nodes that would normally default to the once present physics interface. See Multiphysics Modeling Workflow in the COMSOL Multiphysics Reference Manual.
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When the Lorentz Coupling is used in a domain with magnetic materials such as a magnetizable armature, the Lorentz force is no longer the only force contribution. In this case, the force contribution from the magnetic polarization might need to be considered. This can be done by adding a Force Calculation feature from the Magnetic Fields interface and adding a Body Load feature from the Solid Mechanics interface. Note that the Force Calculation feature includes the force contribution not only from magnetic polarization but also from the Lorentz force, that is, the total electromagnetic force. Therefore, when the coupling between the Magnetic Fields interface and Solid Mechanics interface is implemented with the Force Calculation feature and Body Load feature, the Only use Lorentz force setting should not be used in the same domain.
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Loudspeaker Driver — Frequency-Domain Analysis: Application Library path Acoustics_Module/Electroacoustic_Transducers/loudspeaker_driver
Loudspeaker Driver — Transient Analysis: Application Library path Acoustics_Module/Electroacoustic_Transducers/loudspeaker_driver_transient
Magnetic Damping of Vibrating Conducting Solids: Application Library path ACDC_Module/Electromagnetics_and_Mechanics/magnetic_damping
AC Contactor with Shading Coil: Application Library path ACDC_Module/Electromagnetics_and_Mechanics/contactor_shading_coil
Deformation of an Iron Plate by Magnetic Force: Application Library path ACDC_Module/Electromagnetics_and_Mechanics/plate_deflected_by_magnet
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