http://www.k-wave.org/forum/topic/will-pmloutside-slow-the-speed-of-calculation-in-certain-circumstance Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:02:56 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/will-pmloutside-slow-the-speed-of-calculation-in-certain-circumstance#post-8981 Thu, 07 Dec 2023 11:30:54 +0000 Bradley Treeby 8981@http://www.k-wave.org/forum/ <p>Putting the PML outside will increase the grid size, so you're correct you need to consider the size of the prime factors on the expanded grid. You can set <code>&#39;PMLSize&#39;</code> to <code>&#39;auto&#39;</code> if you want k-Wave to choose a suitable PML size for you. </p> http://www.k-wave.org/forum/topic/will-pmloutside-slow-the-speed-of-calculation-in-certain-circumstance#post-8977 Thu, 07 Dec 2023 05:04:36 +0000 lyz2001 8977@http://www.k-wave.org/forum/ <p>Hi everyone:<br /> I believe it's a fundamental question.As known in the k-wave manual, if PML is set outside the grid,the grid size and medium inputs will be automatically enlarged before the simulation begins.So is there a possibility that the grid size is changed from small prime numbers to big ones(like from 128 to 148),causing a slower speed of calculation ? </p>