Does anyone know how to apply the voltage and frequency to the piezo in COMSOL's ‘pressure acoustic’ physics?

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Firdaus Prabowo

For the piezoelectric modeling, you will need 'solid mechanics' physics and 'electrostatics' physics too. 'Pressure acoustics' is only for propagation of acoustic wave in fluid media.

Juan J. Rojas

You have to use the acoustics-piezoelectric interaction physics under the acoustic-structure interaction node. Voltages and frequencies are applied in Electrostatics module. An acoustic-structure multiphysics coupling module is automatically added.

You can check this document.

https://www.comsol.com/model/download/265491/models.aco.piezoacoustic_transducer.pdf