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 kwave 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!
kWave
A MATLAB toolbox for the timedomain
simulation of acoustic wave fields
diffraction
(2 posts) (2 voices)
Posted 1 week ago #

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 kWave (see this paper, section 2.19.2.6.2 for example). Thus you don't need to do anything more.
Brad.
Posted 6 days ago #
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