k-Wave

1. lokesh
   

   Member
   Joined: Jan '15
   Posts: 7

   Hi,
   I simulated a pressure distribution using k-wave toolbox with the following parameters (N_active = 64, focus = 20mm, f0 = 5MHz, burst length = 200μs, density = 1000 kg/m^3, speed of sound = 1540m/s, dx=dy=dz = 0.16mm). The link is added at the end to visualize the image.
   The image does not look as expected for the focused transducer. I am new to K-wave simulation toolbox. Please provide suggestions where I am going wrong.
   Thank you in advance.

   https://ibb.co/fpwK11D

   Posted 5 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi lokesh,

   You source frequency is higher than the maximum frequency supported by the grid, so the waves don't propagate. I'd recommend at least 3 points per wavelength for a homogeneous simulation. This would correspond to a dx of ~ 0.1 mm, where:

   dx = c0 / (PPW * f0)

   More details in Sec. 3.2 of the k-Wave user manual.

   Brad

   Posted 5 years ago #

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