<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello Andreas, thanks.<div><br></div><div>Then, I shall do so!<div><br></div><div>However, not being an expert in Dune internals programming,</div><div>where would I start ?</div><div><br></div><div>would the extension of dune / grid / geometry grid / coordfunction be the right place ?</div><div><br></div><div>And, more technically speaking, should copy the geometry grid directory into my</div><div>own source tree, implement the things there and, once it works, submit back to Dune?</div><div><br></div><div>What about naming the new implementation ?</div><div><br></div><div>Greetings, Benedikt</div><div><br></div><div><br></div><div><br></div><div><div><br><div apple-content-edited="true">
<div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">--------------------------------------------------------------------------------------------------------------------------------------------------------------<br>Dr. sc. techn. Benedikt Oswald - first engineer - LSPR AG - phone - +41 43 366 90 74<br>Technoparkstrasse 1, CH-8005 Zürich, <a href="mailto:benedikt.oswald@lspr.ch">benedikt.oswald@lspr.ch</a><br>--------------------------------------------------------------------------------------------------------------------------------------------------------------</div></div>
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<br><div><div>On Jan 23, 2014, at 10:04 AM, Andreas Dedner <<a href="mailto:a.s.dedner@warwick.ac.uk">a.s.dedner@warwick.ac.uk</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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<div class="moz-cite-prefix">Hi Benedikt.<br>
You would need to extend GeometryGrid (something many of us would<br>
really appreciate). Basically GeometryGrid replaces the geometries
of the host grid<br>
using the GenericGeometries which are only "linear". This part of
GeometryGrid<br>
would need to be replaced with something higher order, e.g., some
curvilinear approximation.<br>
Best<br>
Andreas<br>
<br>
On 23.01.2014 08:32, Benedikt Oswald wrote:<br>
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<div>Dear Dune</div>
<div><br>
</div>
<div>as it happens we are forced to consider drastic steps to
increase the efficiency of our electromagnetic solvers,</div>
<div>especially in the frequency domain.</div>
<div><br>
</div>
<div>Recently, Peter Bastian suggested we use curvilinear elements
in order to model our curved geometry and domain</div>
<div>boundaries. In fact, we believe that this will help us
enormously since the element count will be much reduced.</div>
<div><br>
</div>
<div>Peter also suggested we use the geometry grid on top of
ALUGrid in order to achieve this.</div>
<div><br>
</div>
<div>Now, my concrete questions is: given an existing curvilinear
mesh (e.g. from gush), how would we do this ?</div>
<div><br>
</div>
<div>I read that geometry grid manages the vertices of the
underlying grid, but, a curvilinear tetrahedral element has</div>
<div>vertices not only in the corners but also on the edges, faces
and inside the volume.</div>
<div>Perhaps my question is trivial, nevertheless, I'd appreciate
your suggestions.</div>
<div><br>
</div>
<div>I should say that gmsh is capable of generating quite nice
curvilinear tetrahedral meshes, at least up to 3rd order.</div>
<div><br>
</div>
<div>Greetings and thanks in advance, Benedikt</div>
<div><br>
</div>
<div><br>
</div>
<br>
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Dr. sc. techn. Benedikt Oswald - first engineer - LSPR AG -
phone - +41 43 366 90 74<br>
Technoparkstrasse 1, CH-8005 Zürich, <a moz-do-not-send="true" href="mailto:benedikt.oswald@lspr.ch">benedikt.oswald@lspr.ch</a><br>
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