http://www.k-wave.org/forum/topic/circular-piston-source-wave-propagation-strictly-in-one-direction Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:40:52 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/circular-piston-source-wave-propagation-strictly-in-one-direction#post-7379 Wed, 08 Apr 2020 12:38:03 +0000 Anastasiia 7379@http://www.k-wave.org/forum/ <p>Thank you , Bradley.<br /> Got it. :) </p> http://www.k-wave.org/forum/topic/circular-piston-source-wave-propagation-strictly-in-one-direction#post-7190 Tue, 21 Jan 2020 09:41:52 +0000 Bradley Treeby 7190@http://www.k-wave.org/forum/ <p>Hi Anastasiia,</p> <p>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).</p> <p>Hope that helps,</p> <p>Brad </p> http://www.k-wave.org/forum/topic/circular-piston-source-wave-propagation-strictly-in-one-direction#post-7124 Wed, 13 Nov 2019 13:37:03 +0000 Anastasiia 7124@http://www.k-wave.org/forum/ <p>Hello!<br /> 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))<br /> source.ux=zeros(1,length(source.uz))/0<br /> source.uy=zeros(1,length(source.uz)) /0,<br /> where uz is the direction of propagation that i want to set.</p> <p>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?<br /> Thank you! </p>