http://www.k-wave.org/forum/topic/long-pulse-heating Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 00:20:57 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/long-pulse-heating#post-8410 Thu, 06 Jan 2022 17:03:49 +0000 bencox 8410@http://www.k-wave.org/forum/ <p>Hi Kevin,</p> <p>Doing the long pulse is straightforward using a time-varying source in <code>kspaceFirstOrder3D</code>, but k-Wave doesn't have a coupled heat-acoustic solver, and the function describing the temperature-dependence of the Grueneisen parameter would have to be somehow incorporated too.</p> <p>Using k-Wave you would have to run the heat solver, <code>kWaveDiffusion</code>, to get the temperature changes (incorporating heat diffusion), use a known function for the temperature-dependence of the Grueneisen parameter to get the time-dependent photoacoustic amplitude, and then use a time-varying source in <code>kspaceFirstOrder3D</code>, scaled by this time-varying Grueneisen parameter, for the acoustic simulation. </p> <p>This would still assume that the acoustic properties (sound speed, density) do not change with temperature, which isn't quite right.</p> <p>Best wishes<br /> Ben </p> http://www.k-wave.org/forum/topic/long-pulse-heating#post-8323 Thu, 07 Oct 2021 22:50:55 +0000 wangk524 8323@http://www.k-wave.org/forum/ <p>Hi,</p> <p>Is it possible use the k-wave toolbox to study the photoacoustic effect due to a long (duration) laser pulse which includes the Grueinesen parameter with the temperature rise and the heat diffusion?<br /> Something on the lines of <a href="https://www.nature.com/articles/s41598-017-00725-4" rel="nofollow">https://www.nature.com/articles/s41598-017-00725-4</a></p> <p>-- Kevin </p>