http://www.k-wave.org/forum/topic/simulating-acoustic-propagation-in-viscous-fluid Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 15:01:23 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/simulating-acoustic-propagation-in-viscous-fluid#post-6782 Sun, 17 Mar 2019 22:35:38 +0000 Bradley Treeby 6782@http://www.k-wave.org/forum/ <p>Hi Sumo,</p> <p>Acoustic absorption in k-Wave is modelled using a fractional Laplacian operator that gives rise to absorption following a frequency power law. If you want to model viscous absorption, just set <code>medium.alpha_power = 2</code>, and define <code>medium.alpha_coeff</code> to give you the desired absorption coefficient in units of dB/MHz^2/cm.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/simulating-acoustic-propagation-in-viscous-fluid#post-6757 Wed, 13 Feb 2019 14:50:18 +0000 Sumo 6757@http://www.k-wave.org/forum/ <p>Hi, Does this tool-box incorporates the viscous effects of fluids in acoustic propagation? If yes, then where to enter the viscosity of the fluid medium? I didn't find anything about the viscosity of the medium in the manual. </p>