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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi Ruth,<br>
<br>
OK it works, thanks !<br>
<br>
Regards,<br>
<br>
Zacharie<br>
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<div style="direction: ltr;" id="divRpF962711"><font color="#000000" face="Tahoma" size="2"><b>De :</b> gmsh-bounces@ace20.montefiore.ulg.ac.be [gmsh-bounces@ace20.montefiore.ulg.ac.be] de la part de Ruth V. Sabariego [r.sabariego@ulg.ac.be]<br>
<b>Date d'envoi :</b> jeudi 23 juin 2011 21:33<br>
<b>À :</b> gmsh@geuz.org<br>
<b>Objet :</b> Re: [Gmsh] Attractors : meshing for skin effect in round conductors ?<br>
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<div>Hi Zacharie,<br>
Your first possibility will work if you add to your file:<br>
Mesh.CharacteristicLengthFromPoints = 1 ;<br>
Mesh.CharacteristicLengthExtendFromBoundary = 0 ;<br>
<br>
By default, the second option is set to one, that's the reason why you don't see the effect of the field you are trying to apply.<br>
<br>
Regards,<br>
Ruth<br>
<br>
<br>
On 23/06/11 21:03, Zacharie DE GRÈVE [530160] wrote:
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<br>
Dear all,<br>
<br>
I would like to mesh a circular conductor in order to follow the skin effect, i.e. with a fine mesh in the skin depth and a coarser mesh in the centre of the conductor :<br>
<br>
Point(1) = {0, 0, 0};<br>
Point(2) = {0.1, 0, 0};<br>
Point(3) = {0, 0.1, 0};<br>
Point(4) = {-0.1, 0, 0};<br>
Point(5) = {0, -0.1, 0};<br>
<br>
Circle(1) = {2, 1, 3};<br>
Circle(2) = {3, 1, 4};<br>
Circle(3) = {4, 1, 5};<br>
Circle(4) = {5, 1, 2};<br>
Line Loop(5) = {2, 3, 4, 1};<br>
Plane Surface(6) = {5};<br>
<br>
I have two possibilities in mind:<br>
<br>
1 . Using Line attractors on the circle arcs:<br>
<br>
Field[1]=Attractor;<br>
Field[1].NNodesByEdge = 50;<br>
Field[1].EdgesList={1,2,3,4};<br>
<br>
Field[2] = Threshold;<br>
Field[2].IField = 1;<br>
Field[2].LcMin = 0.005;<br>
Field[2].LcMax = 0.01;<br>
Field[2].DistMin = 0.02;<br>
Field[2].DistMax = 0.04;<br>
<br>
Background Field = 2;<br>
<br>
This solution does not seem to work (I get a 0.005 mesh everywhere)<br>
<br>
2. Using a point attractor :<br>
<br>
Is it possible to define some kind of "inverse" attractor at the centre of the circle, i.e. with a coarser mesh near the attractor and finer at near surface of the circle ?<br>
<br>
<br>
Thank you very much in advance.<br>
<br>
Best regards,<br>
<br>
Zacharie De Grève<br>
PhD Student, University of Mons, Belgium<br>
<br>
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<pre class="moz-signature" cols="72">--
Dr. Ir. Ruth V. Sabariego
University of Liege, Dept. of Electrical Engineering & Computer Science,
Applied & Computational Electromagnetics (ACE),
phone: +32-4-3663737 - fax: +32-4-3662910 - <a class="moz-txt-link-freetext" href="http://ace.montefiore.ulg.ac.be/" target="_blank">http://ace.montefiore.ulg.ac.be/</a>
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