k-Wave User Forum » Topic: About dx and dt for 2.1 MHz frequency

k-Wave User Forum » Topic: About dx and dt for 2.1 MHz frequency http://www.k-wave.org/forum/topic/about-dx-and-dt-for-21-mhz-frequency Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 00:23:59 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://www.k-wave.org/forum/search.php Yosuke Miyauchi on "About dx and dt for 2.1 MHz frequency" http://www.k-wave.org/forum/topic/about-dx-and-dt-for-21-mhz-frequency#post-6330 Thu, 08 Mar 2018 10:27:09 +0000 Yosuke Miyauchi 6330@http://www.k-wave.org/forum/ Hi Brad, I sincerely thank you for your polite and thorough response. I will improve my simulation. Yosuke Bradley Treeby on "About dx and dt for 2.1 MHz frequency" http://www.k-wave.org/forum/topic/about-dx-and-dt-for-21-mhz-frequency#post-6326 Wed, 07 Mar 2018 22:45:55 +0000 Bradley Treeby 6326@http://www.k-wave.org/forum/ Hi Yosuke, There are some suggestions in Sec. 3.2 of the <a href="http://www.k-wave.org/documentation.php">user manual</a>. Depending on the complexity of your simulation, you could start with 3 points per wavelength, and a CFL of 0.3, and then decrease them to make sure your simulation has converged. Brad. Yosuke Miyauchi on "About dx and dt for 2.1 MHz frequency" http://www.k-wave.org/forum/topic/about-dx-and-dt-for-21-mhz-frequency#post-6310 Sun, 04 Mar 2018 03:27:57 +0000 Yosuke Miyauchi 6310@http://www.k-wave.org/forum/ Hi Brad, I'm studying about 2.1 MHz waves propagating in water. But, I can't assign best value to "dx" and "dt". In my study, dx = 0.3 mm, dt = 50 nsec are assigned, and these parameters meet Nyquist frequency. But, I think 0.3 mm and 50 nsec are tight conditions for 2.1 MHz in water. Could you give me some ideas ? Best regards Yosuke