Dear Erik,<br><br>Thank you for your respond. I want to use cylindrical coordinates in my problem (r, phi, z) and I think I need a physical boundary condition for phi ,rather than a symmetry. It seems rotational boundary condition can be helpful and I thought if I use periodic boundary condition for phi (namely , periodic_y = yes) the code should satisfy my demand . However, it could not. <br>
<br>Am I on the right track ? <br>I think RotatingSymmetry90 cannot do that , because I want to have the full range [-PI, PI] and evolve it . All I need is connecting two ends of the grid in phi direction (or y) together . In other words, I like to tape -PI to PI. <br>
<br>Do you think the thorn Periodic is the appropriate thorn or there is a better thorn which can do that for me ?<br><br>Thank you<br>Hassan<br><br><br><div class="gmail_quote">On Mon, Feb 28, 2011 at 5:37 PM, Erik Schnetter <span dir="ltr"><<a href="mailto:schnetter@cct.lsu.edu">schnetter@cct.lsu.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hassan<br>
<br>
The current version of this thorn is located in an svn repository at<br>
<<a href="http://svn.cactuscode.org/arrangements/CactusNumerical/Periodic" target="_blank">http://svn.cactuscode.org/arrangements/CactusNumerical/Periodic</a>>.<br>
However, this thorn implements a toroidal symmetry, not a rotational<br>
symmetry. Can you describe the symmetry that you are trying to apply?<br>
For example, there is another thorn CactusNumerical/RotatingSymmetry90<br>
that may be more suitable. There is also another thorn available that<br>
implements a Cartoon symmetry.<br>
<br>
We describe much of our code at <<a href="http://einsteintoolkit.org" target="_blank">http://einsteintoolkit.org</a>>, and we<br>
use the mailing list <<a href="mailto:users@einsteintoolkit.org">users@einsteintoolkit.org</a>> for discussion. Would<br>
you mind using this mailing list instead of keeping this conversation<br>
private? The mailing list has the advantage that others will also be<br>
able to help when I don't know the answer.<br>
<br>
-erik<br>
<br>
On Mon, Feb 28, 2011 at 6:20 PM, <<a href="mailto:halatae1@illinois.edu">halatae1@illinois.edu</a>> wrote:<br>
> Dear Dr. Schnetter,<br>
><br>
> I am Hassan Halataei, working in Professor Shapiro's Numerical Relativity group in Univ. of Illinois at Urbana-Champaign. I am trying to use the thorn Periodic you have written in 2003 to implement rotational symmetry in my problem (Single Black hole surrounded by an accretion disk) . I read the 2-page documentary of the thorn and acted according to that . However, the thorn does not work for me . I tried several different things for days to make it work , however the result does not obey periodic boundary condition . I was wondering if you let me know if there is anything that I missed or any other consideration that I must take care of ?<br>
><br>
><br>
> Thank you<br>
> Hassan<br>
><br>
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--<br>
Erik Schnetter <<a href="mailto:schnetter@cct.lsu.edu">schnetter@cct.lsu.edu</a>> <a href="http://www.cct.lsu.edu/%7Eeschnett/" target="_blank">http://www.cct.lsu.edu/~eschnett/</a><br>
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