http://www.k-wave.org/forum/topic/large-attenuation-coefficient Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 02:11:58 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/large-attenuation-coefficient#post-5125 Wed, 08 Jul 2015 11:49:31 +0000 Bradley Treeby 5125@http://www.k-wave.org/forum/ <p>Hi ericott25,</p> <p>This sounds like a classical instability, and can be fixed by using a smaller time step in your simulation. You can use the function <code>checkStability</code> to tell you the maximum time step for which the simulation will be stable.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/large-attenuation-coefficient#post-5115 Wed, 01 Jul 2015 13:52:59 +0000 ericott25 5115@http://www.k-wave.org/forum/ <p>I am attempting to model propagation of a wave through a highly absorbing material (attenuation coefficient = 32.96 dB/MHz*cm) but when I attempt to do so the simulation domain becomes washed over with extremely high pressure (visible after a few seconds in the simulation window). I've tried adjusting this parameter and it looks like anything above approximately 15 dB/MHz*cm yields this same result. Any thoughts on what might cause this and how to fix it? </p>