<div class="gmail_quote">On Sun, May 15, 2011 at 15:23, Henning Sauerland <span dir="ltr"><<a href="mailto:uerland@gmail.com">uerland@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div id=":2gt">Unfortunately, I don't have any practical experience with multigrid methods, but I'm afraid that the conventional part won't make a good coarse level. Depending on the test case (large density ratios between the phases) the standard approximation won't do well. Anyway, I'll take a closer look at the multigrid topic.<br>
<div class="im"></div></div></blockquote></div><br><div>Perhaps there is a homogenized problem for which the conventional method is a good approximation for long-range interaction? For example, if XFEM basis functions could be clipped and then eliminated locally. If you find a method in the literature that you would like to try, let us know and we can give advice for implementation.</div>