k-Wave

1. Rth
   

   Member
   Joined: Jan '16
   Posts: 1

   Hello,

   I'm trying to get to know k-wave and its possibilities, and now I would like to simulate/visualise the redistribution of acoustic energy of a horn-type piezoelectric transducer. What would be the best way to go about that? Basically, the "Diffraction Through a Slit" example seems like a good start. However, how should i simulate the propagation of the acoustic waves through much more complex topologies. eg. Convex, concave, mix of both, ... etc.

   Example of horn-type transducer:

   [img="http://www.ultrasonicweldingtransducer.com/photo/pl10673665-steel_horn_welding_ultrasonic_piezo_transducer_for_tea_bag_packing_machine.jpg"/]

   Posted 8 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi Rth,

   It's possible in k-Wave to define an arbitrary distribution of sound speed and density, with the restriction that it must lie on a uniform Cartesian grid. Thus, if you can represent your geometry using a matrix, then it should be straightforward to run a k-Wave simulation. However, it's worth noting that you will need to use a sufficient number of grid points per acoustic wavelength to ensure you avoid staircasing errors. It's also not currently possibly to explicitly define boundary conditions. If this is something you need to do, you might want to look at tools based on other numerical methods, for example, the boundary element method (for a homogeneous propagation medium with boundaries), or the finite element method (which allows an unstructured mesh).

   Hope that helps,

   Brad.

   Posted 8 years ago #

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