On Wed, Sep 14, 2011 at 10:50 AM, James Moore <span dir="ltr"><<a href="mailto:james.moore@earth.ox.ac.uk">james.moore@earth.ox.ac.uk</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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?<br></blockquote><div><br></div><div>We do not support periodic domains. That seems like a strange setup to me</div><div>when your unknowns are displacements. Wouldn't a stress-free condition be</div>
<div>more what you are looking for?</div><div><br></div><div> Thanks,</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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>
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</blockquote></div><br><br clear="all"><div><br></div>-- <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<br>