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Have you tried to use a structured mesh?<br>
<br>
Transfinite Line(yourlines)= numberofwisheddivisions;<br>
Transfinite Surface '*';<br>
<br>
That would definitely work for plane surfaces.<br>
<br>
If you are not using a transfinite mesh, gmsh will sometimes divide
some elements while keeping the size of the elements as close as
possible to the characteristic length.<br>
<br>
Regards,<br>
Ruth<br>
<br>
<br>
Knell, Sascha wrote:
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I intend to use gmsh in batch
mode to mesh
polygonal plane surfaces whereas nodes of the final mesh may only lie
on predefined,
equally spaced spots on the straight edges of the surface. The distance
of
these spots may not differ by more than factor two on the different
edges of
the surface. I tried to realize this by constructing an edges from
several aligned
lines and setting the minimum / maximum characteristic length to the
minimum / maximum
desired node distance. Regrettably, some of the longer lines exhibited
additional
nodes after meshing. I guess that I have misinterpreted the meaning of
the characteristic
length.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Triangle, by Jonathan Richard
Shewchuk, has
an option to prevent the generation of additional nodes on line
segments. Is
there a way achieving the same in gmsh? I would prefer to use gmesh,
since eyeball
comparison indicates that gmsh produces meshes of better quality.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks in advance.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Sascha Knell<o:p></o:p></span></p>
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<pre class="moz-signature" cols="72">--
Dr. Ir. Ruth V. Sabariego
University of Liege, Institut Montefiore,
Dept. of Electrical Engineering & Computer Science,
Applied & Computational Electromagnetics (ACE),
Sart Tilman Campus, Grande Traverse, 10 (B28), B-4000 LIEGE, Belgium
phone: +32-4-3663737 -- fax: +32-4-3662910 -- <a class="moz-txt-link-freetext" href="http://elap.montefiore.ulg.ac.be/">http://elap.montefiore.ulg.ac.be/</a></pre>
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