The Thermoviscous Acoustic-Thermoelasticity Boundary coupling is only applicable for Frequency Domain Perturbation (combined with a Stationary study) and Time Dependent studies. This is the case as the Heat Transfer in Solids interface is not formulated in terms of perturbations as all acoustic interfaces are. This typically requires solving for the stationary temperature field in the solid, which then forms the linearization point for the acoustic model. The stationary temperature field can be selected in Model Input for the acoustic model to get consistent material data.
See The Thermoviscous Acoustic-Thermoelasticity Interaction Multiphysics Interfaces section in the Thermoviscous Acoustics Interfaces chapter for more details.
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Prestressed Micromirror Vibrations: Thermoviscous-Thermoelasticity Coupling. The Application Library path: Acoustics_Module/Vibrations_and_FSI/micromirror_prestressed_vibrations
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