<div dir="ltr">Hi,<div><br></div><div>I have a high-resolution STL surface (~100k triangles) and I want to create a 3D tetrahedral mesh of the interior for CFD simulations. The first step is to remesh the surface to a more reasonable resolution.</div><div><br></div><div>Now the thing is that I want to do second-order curved elements for the boundaries for better accuracy/performance of the CFD, which is quite expensive. Image of 2D version of what I want to do is linked here: <a href="http://imgur.com/a/h5834">http://imgur.com/a/h5834</a>. This means that the extra side-nodes should be placed on the high-resolution geometry, not just as a linear interpolation of the corners. NetGen does this very well, but I would like to use gmsh instead since it doesn't crash as much. :o)</div><div><br></div><div>Can this be accomplished in gmsh? I have played around with the surface remeshing features according to <a href="https://geuz.org/trac/gmsh/wiki/STLRemeshing">https://geuz.org/trac/gmsh/wiki/STLRemeshing</a> (user/pass: geuz), but no luck so far. Maybe I'm missing something elementary.</div><div><br></div><div>Cheers,</div><div><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:small"><div><br></div><div>— </div><div>Johannes Töger</div><div><br></div></div><div style="font-size:small">Postdoctoral Research Scholar</div><div style="font-size:small"><div>National 7T Facility, Lund Biomedical Imaging Center</div></div><div style="font-size:small">Department of Clinical Sciences Lund, Diagnostic Radiology</div><div style="font-size:small">Lund University, Sweden<br></div></div></div></div></div></div></div></div></div></div>
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