http://www.k-wave.org/forum/topic/finite-amplitude-acoustic-simulation-involving-rigid-and-complex-shaped-objects Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 03:46:46 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/finite-amplitude-acoustic-simulation-involving-rigid-and-complex-shaped-objects#post-8104 Thu, 25 Mar 2021 17:32:09 +0000 Bradley Treeby 8104@http://www.k-wave.org/forum/ <p>Hi Jack,</p> <p>I'm not sure I understand what you mean by "complex geometry" and "non-penetrating conditions of the fluid and the solid surface should be matched". k-Wave can't deal with elastic nonlinearity (nonlinearity in solids) if that's what you mean. If you just care about fluid media, then k-Wave can handle heterogeneous material properties.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/finite-amplitude-acoustic-simulation-involving-rigid-and-complex-shaped-objects#post-8074 Tue, 02 Mar 2021 10:14:03 +0000 Jack Liu 8074@http://www.k-wave.org/forum/ <p>Hi everyone,</p> <p> It is a really amazing toolbox for me, a novice in nonlinear acoustics simulation.</p> <p> I want to similuate the finite-amplitude nonlinear acoustic behaviors of a vibrational objects but with complex geometry. Thus, the non-penetrating conditions of the fluid and the solid surface should be matched. Now, I am not sure whether the k-wave method can deal with this problem well.</p> <p> By the way, I have read some textbooks about nonlinear acoustics theory, i.e., "Nonlinear acoustics" edited by Hamilton and Blackstock. One question make me quite confused. The commom used nonlinear acoustic models (i.e, Westervelt's euqtions, KZK euqations) were approximated from Euler equation or N-S equation. After using the second-order approximation, the dercived euqtions still includes the nonlinear convective terms, which are diffcult to deal with numerically. So, why have to make this approximation? and directly using the Euler euqation to model the nonlinear acoustic behaviors would be a better choice? </p> <p> Please help me on the two problems!</p> <p>Thank you!</p> <p>Jack Liu </p>