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<p class="MsoPlainText">Hi Matthias,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><span lang="EN-US">It would have been nice to see the script file you are working on to better identify the error, nevertheless here are a few questions :<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Are you trying to mesh a disk or a donut shape ? In the latter case, did you properly define the hole in the surface (see Plane Surface
<a href="http://gmsh.info/doc/texinfo/gmsh.html#Surfaces">here</a>)?<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Do you really need fields to control your mesh density ? Using point characteristic lengths (see Point
<a href="http://gmsh.info/doc/texinfo/gmsh.html#Points">here</a>) may be enough and far easier to implement.<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">If you want to mesh a disk, you will want to embed the inner circle in the disk defined by the outer one using the Line in Surface command (see
<a href="http://gmsh.info/doc/texinfo/gmsh.html#Miscellaneous-mesh-commands">here</a>).<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Did it help ? Let me know if you still have questions,<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif;color:#000099;mso-fareast-language:FR">Guillaume DILASSER</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#000099;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#000099;mso-fareast-language:FR">Doctorant SACM / LEAS<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#000099;mso-fareast-language:FR">CEA - Centre de Saclay - Bât.123 - PC 319c</span><span style="color:#000099;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#000099;mso-fareast-language:FR">91191 Gif sur Yvette Cedex - France -</span><span style="color:#000099;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#000099;mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#000099;mso-fareast-language:FR"><a href="mailto:guillaume.dilasser@cea.fr"><span style="color:blue">guillaume.dilasser@cea.fr</span></a><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="mso-fareast-language:FR">-----Message d'origine-----<br>
De : gmsh [mailto:gmsh-bounces@ace20.montefiore.ulg.ac.be] De la part de Matthias Sitte<br>
Envoyé : lundi 19 juin 2017 13:18<br>
À : gmsh@onelab.info<br>
Objet : [Gmsh] refining the mesh of a circle with Attractor Fields</span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Hi all,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I'm trying to set up the following problem:<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">1) Create a circular geometry with radius R_outer using 4 Circles and a Line Loop which defines the outer boundary of the mesh.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">2) Create another closed circle (again made out of 4 Circles) with radius R_inner inside the circular mesh.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">3) Goal is to reduce lchar and create a finer mesh close the inner circle, but keep the coarser mesh everywhere else.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">So far I've started from the example t10.geo and mostly got what I wanted. But I observed that if I close the inner circle, all of the mesh within the circle is meshed with reduced lchar, not the lchar I would've expected. When I open
the circle by leaving out segment(s), the result looks better w.r.t. mesh size, but it's of course not what I want. Am I missing something here?<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Best,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Matthias<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">_______________________________________________<o:p></o:p></p>
<p class="MsoPlainText">gmsh mailing list<o:p></o:p></p>
<p class="MsoPlainText"><a href="mailto:gmsh@onelab.info"><span style="color:windowtext;text-decoration:none">gmsh@onelab.info</span></a><o:p></o:p></p>
<p class="MsoPlainText"><a href="http://onelab.info/mailman/listinfo/gmsh"><span style="color:windowtext;text-decoration:none">http://onelab.info/mailman/listinfo/gmsh</span></a><o:p></o:p></p>
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