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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I’m trying to approximate an infinitely long strike slip fault… which is essentially a 2D anti-plane problem. Hence my thoughts regarding using periodic domains to make the 3D case resemble a stretched 2D case with no end effects.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>James<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>---------------<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>D.Phil Research Student,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://comet.nerc.ac.uk/">COMET+ Research Group</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>Department of Earth Sciences,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>University of Oxford,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>South Parks Road,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>Oxford,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>OX1 3AN,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>United Kingdom<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> knepley@gmail.com [mailto:knepley@gmail.com] <b>On Behalf Of </b>Matthew Knepley<br><b>Sent:</b> 14 September 2011 16:56<br><b>To:</b> James Moore<br><b>Cc:</b> Brad Aagaard; cig-short@geodynamics.org<br><b>Subject:</b> Re: [CIG-SHORT] 2D Simulations<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On Wed, Sep 14, 2011 at 10:50 AM, James Moore <<a href="mailto:james.moore@earth.ox.ac.uk">james.moore@earth.ox.ac.uk</a>> wrote:<o:p></o:p></p><div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>Dear Brad (or anyone else who can help me),<br><br>Further to my previous question, is it possible to implement periodic<br>boundary conditions for a 3 D problem, thus negating edge effects?<o:p></o:p></p></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>We do not support periodic domains. That seems like a strange setup to me<o:p></o:p></p></div><div><p class=MsoNormal>when your unknowns are displacements. Wouldn't a stress-free condition be<o:p></o:p></p></div><div><p class=MsoNormal>more what you are looking for?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> Thanks,<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> Matt<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>James<br><br>---------------<br>D.Phil Research Student,<br>COMET+ Research Group<br><br>Department of Earth Sciences,<br>University of Oxford,<br>South Parks Road,<br>Oxford,<br>OX1 3AN,<br>United Kingdom<br><br>-----Original Message-----<br>From: <a href="mailto:cig-short-bounces@geodynamics.org">cig-short-bounces@geodynamics.org</a><br>[mailto:<a href="mailto:cig-short-bounces@geodynamics.org">cig-short-bounces@geodynamics.org</a>] On Behalf Of Brad Aagaard<br>Sent: 17 August 2011 18:11<br>To: <a href="mailto:cig-short@geodynamics.org">cig-short@geodynamics.org</a><br>Subject: Re: [CIG-SHORT] 2D Simulations<br><br>James-<br><br>PyLith does not support 2-D out-of-plane deformation. We have not<br>implemented this capability because it involves writing extra code to handle<br>this special case. The workaround is to construct a 3-D model and apply<br>Dirichlet boundary conditions to enforce the desired symmetry and extract<br>the solution along the centerline. This is more computational intensive but<br>works reasonably well.<br><br>Brad<br><br><br>On 8/17/11 7:39 AM, James Moore wrote:<br>> Hello all,<br>><br>> I have recently come back to Pylith after a year or so of not having<br>> used it and wanted to run some toy problems in 2D. The manual has<br>> examples of plane strain problems being solved, however I was interested<br>> in running the anti-plane problem, corresponding to shear out of the<br>> plane of a 2 dimensional slice through a strike slip fault. I can run<br>> the 3D equivalent, and tried applying 3D boundary conditions to a 2D<br>> mesh, but it didn't seem to like it very much.<br>><br>> Any suggestions?<br>><br>> Many thanks,<br>><br>> James Moore<br>><br>> ---------------<br>><br>> D.Phil Research Student,<br>><br>> COMET+ Research Group <<a href="http://comet.nerc.ac.uk/" target="_blank">http://comet.nerc.ac.uk/</a>><br>><br>> Department of Earth Sciences,<br>><br>> University of Oxford,<br>><br>> South Parks Road,<br>><br>> Oxford,<br>><br>> OX1 3AN,<br>><br>> United Kingdom<br>><br>><br>><br>> _______________________________________________<br>> CIG-SHORT mailing list<br>> <a href="mailto:CIG-SHORT@geodynamics.org">CIG-SHORT@geodynamics.org</a><br>> <a href="http://geodynamics.org/cgi-bin/mailman/listinfo/cig-short" target="_blank">http://geodynamics.org/cgi-bin/mailman/listinfo/cig-short</a><br><br>_______________________________________________<br>CIG-SHORT mailing list<br><a href="mailto:CIG-SHORT@geodynamics.org">CIG-SHORT@geodynamics.org</a><br><a href="http://geodynamics.org/cgi-bin/mailman/listinfo/cig-short" target="_blank">http://geodynamics.org/cgi-bin/mailman/listinfo/cig-short</a><br><br>_______________________________________________<br>CIG-SHORT mailing list<br><a href="mailto:CIG-SHORT@geodynamics.org">CIG-SHORT@geodynamics.org</a><br><a href="http://geodynamics.org/cgi-bin/mailman/listinfo/cig-short" target="_blank">http://geodynamics.org/cgi-bin/mailman/listinfo/cig-short</a><o:p></o:p></p></blockquote></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener<o:p></o:p></p></div></body></html>