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<DIV><FONT face=Arial size=2>Dear all,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'am trying to use the "Periodic Boundary
Conditions" in a simplified model of permanent magnet </FONT></DIV>
<DIV><FONT face=Arial size=2>linear motor, </FONT><FONT face=Arial
size=2>according to an information given by Christophe Geuzaine on the same
topic (see mailing </FONT></DIV>
<DIV><FONT face=Arial size=2>list June 2005).</FONT></DIV>
<DIV><FONT face=Arial size=2>In order to check the method, I used a model with
magnet centered on the teeth, I used the vector </FONT></DIV>
<DIV><FONT face=Arial size=2>potential </FONT><FONT face=Arial
size=2>formulation and I ran the same problem with two sets of
</FONT><FONT face=Arial size=2>boundary conditions :</FONT></DIV>
<DIV><FONT face=Arial size=2> 1. A Dirichlet a = 0 on three
sides</FONT></DIV>
<DIV><FONT face=Arial size=2> 2. A Dirichlet a = 0 on upper
border and periodic conditions between left and right side</FONT></DIV>
<DIV><FONT face=Arial size=2>For both cases, there was no error
reported.</FONT></DIV>
<DIV><FONT face=Arial size=2>As the geometry is a symmetrical one, both methods
should be equivalent but the calculation results are</FONT></DIV>
<DIV><FONT face=Arial size=2>obviously different.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Could you help me. The files are attached for
tests. The file ".don" contains the main dimensions </FONT></DIV>
<DIV><FONT face=Arial size=2>and is included in both ".geo" and ".pro". For the
second case, please modify ".don" and ".pro" as </FONT></DIV>
<DIV><FONT face=Arial size=2>indicated inside the files.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks</FONT></DIV></FONT></DIV></BODY></HTML>