k-Wave

1. federico.rossano
   

   Member
   Joined: Dec '21
   Posts: 7

   Hi,

   I would like to run an elastic wave simulation using a bowl transducer binary mask in a heterogeneous medium. I see that, in order to set my input signal to the transducer mask running pstdElastic3D, I have to use a stress souce. My transducer points towards z-, so I was wondering if I need to set all the 'source.sxx', '.syy', '.sxy' etc.. equal to "-signal" or just the 'source.szz=-signal' (the transducer oscillates only along z). Thank you a lot in advance and sorry for the trivial question but I am not familiar with mechanical stress.

   Federico

   Posted 2 years ago #

2. bencox
   

   Developer
   Joined: Mar '10
   Posts: 292

   Hi federico,

   If your transducer is a pressure transducer (not a shear transducer), then you want to set just the normal stress perpendicular to the surface, yes. If you want the signal to be emitted perpendicular to the bowl surface, then setting just the szz component would only be right for a planar transducer (and probably ok for a weakly curved one). For a more curved transducer this may not be sufficient, as the surface is not facing the z direction (except at the centre perhaps). You may want to also set components sxx and/or syy.

   Best wishes
   Ben

   Posted 2 years ago #

3. federico.rossano
   

   Member
   Joined: Dec '21
   Posts: 7

   Hi Ben,

   Thanks a lot!

   Kind regards,
   Federico

   Posted 2 years ago #

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