k-Wave

1. raffaele84
   

   Member
   Joined: Oct '20
   Posts: 1

   Hi,

   I'm new to k-wave. Some basic question: I want to simulate the field and heat generated by a disk transducer that has a non-zero thickness, to see the effect of different thicknesses.

   1) I was following the "Example: Heat Diffusion In A Homogeneous Medium" using the makeDisk mask, but I don't know how to get the field along the axis perpendicular to the disk, do I need 3D simulation? The 2D example seems to generate the filed AROUND the disk.

   2) How do I generate a disk defining also the thickness?

   3) I see that the input and output are given in pressure, I generally know the power generated by my transducer (or received), but not the pressure. Is it correct to convert my "power divided by the transducer surface" (so I get the intensity) into pressure? And vice-versa, at the receiver location?

   Posted 4 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi raffaele84,

   (1) Yes you will need to run a 3D simulation. There are some examples for disc sources in 3D as part of the new kWaveArray class.

   (2) One way would be to define a disc in 2D, and then copy this into slabs of a 3D matrix to give you a cylinder of the required height.

   (3) This will be approximately right if you convert power -> intensity -> pressure (e.g., using plane wave relationships). However, keep in mind that in practice, transducers rarely act as ideal radiators, so using a uniform additive pressure source will not give the exact response.

   Brad.

   Posted 4 years ago #

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