http://www.k-wave.org/forum/topic/initial-pressure-gradient-in-kspacefirstorder3d Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 01:45:52 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/initial-pressure-gradient-in-kspacefirstorder3d#post-5752 Fri, 18 Nov 2016 21:34:12 +0000 bencox 5752@http://www.k-wave.org/forum/ <p>Hi rodlming,</p> <p>As well as setting the initial pressure, you can set the initial particle velocity in kspaceFirstOrder3D, which is closely related to the pressure gradient (see the equations in the User Manual). Or you could use a time varying source to set the temporal pressure gradient. There isn't an option to set it directly as there is with kspaceSecondOrder though.</p> <p>Kind regards,<br /> Ben </p> http://www.k-wave.org/forum/topic/initial-pressure-gradient-in-kspacefirstorder3d#post-5749 Thu, 17 Nov 2016 06:35:05 +0000 rodlming 5749@http://www.k-wave.org/forum/ <p>Hello,<br /> I am first time using K-Wave tool box.<br /> I was wondering how should I set up the initial pressure gradient in kspaceFirstOrder3D function<br /> Is set up the pressure gradient set possible only kspaceSecondOrder function ?<br /> could you tell me please.<br /> Thank you </p>