k-Wave

1. Anastasiia
   

   Member
   Joined: Nov '19
   Posts: 20

   Dear Bradley Treeby,
   The known diffraction correction integrals for US sources and receivers have been derived assuming the boundary condition of the source being flush with a wall, therefore the velocity of whatever is surrounding the source is =0.
   I was wondering, in k-wave simulations, if we need to model this situation should we make let's say a source mask where the central elements have a nonzero velocity (mimicking the transducer) while the outer border ones have a velocity equal zero (mimicking the wall) or is this boundary condition automatically provided?
   Thanks in advance!

   Posted 4 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,640

   Hi Anastasiia,

   In the standard formulation of the Rayleigh integral for example, the boundary condition is a uniform velocity source in an infinite baffle. This is equivalent to using a pressure source in free space as used in k-Wave (see this paper, section 2.19.2.6.2 for example). Thus you don't need to do anything more.

   Brad.

   Posted 4 years ago #

3. Anastasiia
   

   Member
   Joined: Nov '19
   Posts: 20

   Thanks!

   Posted 4 years ago #

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