http://www.k-wave.org/forum/topic/setting-an-initial-pressure-gradient-example Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 00:20:43 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/setting-an-initial-pressure-gradient-example#post-1020 Sat, 17 Nov 2012 00:18:37 +0000 Bradley Treeby 1020@http://www.k-wave.org/forum/ <p>Hi Mosina,</p> <p>The function <a href="http://www.k-wave.org/documentation/kspaceSecondOrder.php">kspaceSecondOrder</a> which is used in this example is based on an exact Green's function solution to the homogeneous wave equation. Unfortunately this means the medium cannot be heterogeneous.</p> <p>Similarly, at this stage, we have not implemented initial velocity sources into the first-order simulation functions (<a href="http://www.k-wave.org/documentation/kspaceFirstOrder2D.php">kspaceFirstOrder2D</a>, etc). An alternative would be to use a time varying velocity source with a short (but smooth) temporal pulse (e.g., a Gaussian), and then use <code>source.u_mask</code> to define your source distribution.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/setting-an-initial-pressure-gradient-example#post-1017 Fri, 16 Nov 2012 19:32:31 +0000 mosina_ir2006@yahoo.com 1017@http://www.k-wave.org/forum/ <p>hi, can i simulate this example with Heterogeneous Propagation Medium? </p>