<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I don't know of any Squeak code to do this. The starting-point paper about this kind of simulation (for computer graphics, anyway) is "Stable Fluids" by Jos Stam (<font class="Apple-style-span" color="#144FAE"><span class="Apple-style-span" style="text-decoration: underline;"><a href="http://www.dgp.toronto.edu/people/stam/reality/Research/pdf/ns.pdf">http://www.dgp.toronto.edu/people/stam/reality/Research/pdf/ns.pdf</a></span></font>). I'm not sure if there is a later paper that is more approachable; the others I've seen are more complicated. Also note that I don't believe that Stam's method can model breaking waves... it doesn't allow for a dynamic boundary between different fluids (eg: air and water). <div><div><div><div><div><div><br class="webkit-block-placeholder"></div><div>Ron Fedkiw has some of the most impressive results (for example: <a href="http://physbam.stanford.edu/~fedkiw/animations/lighthouse.avi)">http://physbam.stanford.edu/~fedkiw/animations/lighthouse.avi)</a>. Of course, the implementations are more complicated.</div><div><br class="webkit-block-placeholder"></div><div>Sorry I couldn't be more helpful; hopefully someone else has better pointers.</div><div><br class="webkit-block-placeholder"></div><div>Josh</div><div><br class="webkit-block-placeholder"></div><div><br class="webkit-block-placeholder"></div><div>On Dec 11, 2007, at 9:23 AM, Dan Ingalls wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">... that's Computational Fluid Dynamics. I'm specifically interested in running a Navier-Stokes simulation using something like the Volume of Fluid model to deal with free surface movement. My first goal is to be able to duplicate something like the following simulation of a breaking wave:<br><br><span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://www.coastal.udel.edu/faculty/jpuleo/RIPPLE/ripple.mov">http://www.coastal.udel.edu/faculty/jpuleo/RIPPLE/ripple.mov</a><br><br>I want to be able to run similar simulations for waves breaking against different shaped walls.<br><br>Most people use big programs in C or Fortran (!), and half the trouble is learning how to use them, since there's no prayer of changing them. However the basic equations can be written in half a page, and I don't need it to run very fast.<br><br>It could be fun but so far it looks like it will be simpler to build a wave tank :-(.<br><br>Thanks for any useful pointers.<br><br><span class="Apple-tab-span" style="white-space:pre"> </span>- Dan<br><br></blockquote></div><br></div></div></div></div></body></html>