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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal">I run currently into problems when I want to mesh my model.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have two large equally sized connected 2D domains of total size LxH. Due to my problem I need a high resolution at following points:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Small area around Joint line of both domains between a<=x<=L with a>0<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Small circle around point at x=L and y=H/2<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Small area around line x=L and H/2-b<y<H/2+b, where b is small in comparison with H<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For the refinements I use the Attractor and Threshold fields with a combined Field = Min. The minimum mesh size is 0.125 for refinement 2 and 0.25 for refinements 1 and 3.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have run the meshing procedure with 5 variations. 4 of those failed. The only parameters I varied are the: Length, height, maximum element size and (for the successful simulation) as well the parameter a. The model size varies between
4000x1600 and 6000x2000. And the maximum element size between 50 and 100.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Depending on the different variations I get different failure modes.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo3"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Warning: Skipping bad triangle; Error: Unable to recover an edge. – only one of the domains is meshed<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo3"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>GMSH crashes<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo3"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>For Meshing of both domains – Error: Identical points in triangulation; Error: Unable to recover an edge. Increasing Mesh.RandomFactor does not help<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo3"><![if !supportLists]><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Error: Unable to recover an edge. – only one of the domains is meshed<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The .geo files are attached with the suffix corresponding to the failure mode. Suffix 5 corresponds to the working mesh generation.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here I used GMSH version 2.12.0 and 3.0.1. The operating system is Windows 7, 64-bit.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What is the reason behind the failure and is there a way to remedy the problem? It would really help me a lot.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks already in advance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Franz<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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