k-Wave

1. Anastasiia
   

   Member
   Joined: Nov '19
   Posts: 20

   Hello!
   I have been trying to run simulations in 3D with a plane piston source. What i notice is that my source seems to be sending signal to all directions. Not only to the propagation direction that i want to programme, and that goes for a pressure source but also for a velocity source, where i set: source.uz=filt_signal(1:1.5*length(signal1))
   source.ux=zeros(1,length(source.uz))/0
   source.uy=zeros(1,length(source.uz)) /0,
   where uz is the direction of propagation that i want to set.

   I still see wave propagating strictly along x direction along the surface of my source, and the same for y direction. Is this normal? and is there an underlying physical phenomenon under this or rather a disadvantage of the simulaton?
   Thank you!

   Posted 5 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi Anastasiia,

   Unless you define a plane wave, a finite source will propagate energy in all directions (except in the transverse axis for a velocity source). For a piston, the field arises because of the interaction of a plane wave component, and a toroidal edge wave. You can find more information in a good book on acoustics (e.g., Cobbold's Foundations of Biomedical Ultrasound).

   Hope that helps,

   Brad

   Posted 4 years ago #

3. Anastasiia
   

   Member
   Joined: Nov '19
   Posts: 20

   Thank you , Bradley.
   Got it. :)

   Posted 4 years ago #

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