http://www.k-wave.org/forum/topic/nonuniform-grids Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:36:49 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/nonuniform-grids#post-4889 Fri, 12 Dec 2014 11:45:58 +0000 Bradley Treeby 4889@http://www.k-wave.org/forum/ <p>Hi DNF,</p> <p>Thanks for your query. Using a non-uniform grid is a sensible thing to try for media with large changes in the material coefficients. Unfortunately, at this point, the use of non-uniform grids is not a supported feature. With the current version (1.1) it is possible to use nonuniform grids via the undocumented <code>kgrid.setNUGrid</code> method, but this only works in 1D (the nonuniform grid code is not currently included in <code>kspaceFirstOrder2D</code> and <code>kspaceFirstOrder3D</code> or in the elastic codes). We are currently working on expanding this, but a revised version might be some time away. We are also intending to update the manual (particularly to include the elastic code), but that won't be until the new year.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/nonuniform-grids#post-4860 Wed, 26 Nov 2014 15:42:56 +0000 DNF 4860@http://www.k-wave.org/forum/ <p>Hi. I'm simulating elastic propagation in strongly heterogeneous media (i.e. steel plate immersed in fluid). The large contrast in sound velocity causes the simulations to be extremely time-consuming, and it would be very interesting to make use of non-uniform grids. The <code>kWaveGrid</code> class has a <code>nonuniform</code> property and some methods for specifying and handling such grids, but I cannot find any examples of its use, nor a very clear description of input parameters to the <code>setNUGrid</code> method.</p> <p>* Am I correct in thinking that using non-uniform grids would be an appropriate strategy in strongly heterogeneous media, in that it would reduce execution time?<br /> * Can <code>pstdElastic2D</code> handle non-uniform grids?<br /> * How do I use the method <code>setNUGrid</code>?<br /> (* Oh, btw, is there any progress on an updated user manual? :) </p>