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PML in time-domain acoustic module using PDE (Comsol v4.4)
Posted 17 avr. 2015, 14:52 UTC−4 Acoustics & Vibrations Version 4.4 0 Replies
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I am trying to simulate the response of a structure to an incoming acoustic wave in time-domain, by using the acoustic structure-interaction module. I am working on a 2d-axysim model. I am dealing with BC for my domain.
Trying the various radiation conditions available, I unfortunately get nasty reflected waves that lead to incorrect results. Also, I see that PML is not implemented in time-domain for the acoustic module.
Are you aware of any way to overcome the reflected waves problem in time domain in the acoustic module?
Alternatively, I was trying to implement my own time-domain PML by using the PDE module. However, I have really no idea where to start with the PDE module for correctly modeling the PML in cylindrical coordinates (as my model is in 2D-axysim).
Has anyone already done it? Can someone give me some insight on it?
Thanking in advance for the help,
Alessio Caciagli
Hello Alessio Caciagli
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