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[svn:einsteintoolkit] www/seminars/2011_11_28/ (Rev. 750)
by knarf＠cct.lsu.edu 24 Nov '11

24 Nov '11

User: knarf Date: 2011/11/24 02:37 PM Modified: /seminars/2011_11_28/ index.php Log: fix html File Changes: Directory: /seminars/2011_11_28/ ================================ File [modified]: index.php Delta lines: +1 -1 =================================================================== --- seminars/2011_11_28/index.php 2011-11-24 20:37:15 UTC (rev 749) +++ seminars/2011_11_28/index.php 2011-11-24 20:37:50 UTC (rev 750) @@ -25,7 +25,7 @@ </p> <h3>Presenter: Zachariah Etienne</h3> -<img href="Zachariah_Etienne.jpg" width="20%" alt="Zachariah Etienne"> +<img src="Zachariah_Etienne.jpg" width="20%" alt="Zachariah Etienne"> <p> NSF Astronomy <&amp> Astrophysics Postdoctoral Fellow, University of Illinois </p>

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[svn:einsteintoolkit] www/ (Rev. 749)
by knarf＠cct.lsu.edu 24 Nov '11

24 Nov '11

User: knarf Date: 2011/11/24 02:37 PM Added: /seminars/ index.php /seminars/2011_11_28/ Zachariah_Etienne.jpg, index.php Log: test seminars pge Directory Changes: Directory: /svn:executable/ =========================== + * Directory: /svn:mime-type/ ========================== + application/octet-stream File Changes: Directory: /seminars/2011_11_28/ ================================ File [added]: Zachariah_Etienne.jpg Delta lines: +0 -0 =================================================================== (Binary files differ) Property changes on: seminars/2011_11_28/Zachariah_Etienne.jpg ___________________________________________________________________ File [added]: index.php Delta lines: +40 -0 =================================================================== --- seminars/2011_11_28/index.php (rev 0) +++ seminars/2011_11_28/index.php 2011-11-24 20:37:15 UTC (rev 749) @@ -0,0 +1,40 @@ +<?php $title='Einstein Toolkit Seminars'; +include_once($_SERVER['DOCUMENT_ROOT'].'/global/header.php');?> + +<h2>Improved EM Gauge Condition for GRMHD Simulations with AMR</h2> + +<h3>Abstract</h3> +<p> +We recently developed a new GRMHD code with AMR that evolves the +electromagnetic (EM) vector potential A<sub>i</sub> instead of the magnetic fields +directly. Evolving A<sub>i</sub> enables one to use any interpolation scheme on +refinement level boundaries and still guarantee that the magnetic field remains +divergenceless. As in classical EM, a gauge choice must be made when evolving +A<sub>i</sub>, and we originally chose a straightforward ``algebraic'' gauge condition +to simplify the A<sub>i</sub> evolution equation. However, magnetized black +hole-neutron star (BHNS) simulations in this gauge exhibit unphysical behavior, +including the spurious appearance of strong magnetic fields on refinement level +boundaries. This spurious behavior is exacerbated when matter crosses +refinement boundaries during tidal disruption of the NS. We demonstrate via an +eigenvalue analysis and a numerical study that zero-speed modes in the +algebraic gauge, coupled with the frequency filtering that occurs on refinement +level boundaries, are responsible for the creation of spurious magnetic fields. +We show that the EM Lorenz gauge exhibits no zero-speed modes, and as a +consequence, spurious magnetic effects are quickly propagated away, allowing +for long-term, stable magnetized BHNS evolutions. +</p> + +<h3>Presenter: Zachariah Etienne</h3> +<img href="Zachariah_Etienne.jpg" width="20%" alt="Zachariah Etienne"> +<p> +NSF Astronomy <&amp> Astrophysics Postdoctoral Fellow, University of Illinois +</p> +<p> +Numerical Relativity Group Research interests: My research interests span all +of computational astrophysics. Much of my past work has focused on simulating +the mergers of compact binary systems, including BHNS, BHBH, WDNS, and NSNS. My +current work focuses on BHBH mergers, as well as studying MHD effects in BHNS +mergers. +</p> + +<?php include_once($_SERVER['DOCUMENT_ROOT'].'/global/footer.php');?> Property changes on: seminars/2011_11_28/index.php ___________________________________________________________________ Directory: /seminars/ ===================== File [added]: index.php Delta lines: +9 -0 =================================================================== --- seminars/index.php (rev 0) +++ seminars/index.php 2011-11-24 20:37:15 UTC (rev 749) @@ -0,0 +1,9 @@ +<?php $title='Einstein Toolkit Seminars'; +include_once($_SERVER['DOCUMENT_ROOT'].'/global/header.php');?> + +<p>The Einstein Toolkit (irregularly at the moment) hosts seminars on topics of +interest to the numerical relativity community. Date, time and (virtual) +location are, besides here, announced on the Einstein Toolkit mailing list. +</p> + +<?php include_once($_SERVER['DOCUMENT_ROOT'].'/global/footer.php');?> Property changes on: seminars/index.php ___________________________________________________________________

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[svn:einsteintoolkit] NullVars/trunk/ (Rev. 7)
by schnetter＠cct.lsu.edu 23 Nov '11

23 Nov '11

User: eschnett Date: 2011/11/23 01:14 PM Modified: /trunk/ configuration.ccl Log: Correct syntax error File Changes: Directory: /trunk/ ================== File [modified]: configuration.ccl Delta lines: +1 -1 =================================================================== --- trunk/configuration.ccl 2011-10-25 18:45:32 UTC (rev 6) +++ trunk/configuration.ccl 2011-11-23 19:14:12 UTC (rev 7) @@ -1,6 +1,6 @@ # configuration.ccl file for thorn NullGrid -PROVIDES: NullVars +PROVIDES NullVars { LANG }

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[svn:einsteintoolkit] NullSHRExtract/trunk/ (Rev. 8)
by schnetter＠cct.lsu.edu 23 Nov '11

23 Nov '11

User: eschnett Date: 2011/11/23 01:14 PM Modified: /trunk/ configuration.ccl Log: Correct syntax error File Changes: Directory: /trunk/ ================== File [modified]: configuration.ccl Delta lines: +1 -1 =================================================================== --- trunk/configuration.ccl 2011-10-25 18:45:31 UTC (rev 7) +++ trunk/configuration.ccl 2011-11-23 19:14:01 UTC (rev 8) @@ -1,7 +1,7 @@ # Configuration definition for thorn NullSHRExtract # $Header:$ -PROVIDES: NullSHRExtraction +PROVIDES NullSHRExtraction { }

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[svn:einsteintoolkit] NullInterp/trunk/ (Rev. 6)
by schnetter＠cct.lsu.edu 23 Nov '11

23 Nov '11

User: eschnett Date: 2011/11/23 01:13 PM Modified: /trunk/ configuration.ccl Log: Correct syntax error File Changes: Directory: /trunk/ ================== File [modified]: configuration.ccl Delta lines: +1 -1 =================================================================== --- trunk/configuration.ccl 2011-10-25 18:45:29 UTC (rev 5) +++ trunk/configuration.ccl 2011-11-23 19:13:47 UTC (rev 6) @@ -2,7 +2,7 @@ # $Header$ REQUIRES THORNS: NullGrid -PROVIDES: NullInterp +PROVIDES NullInterp { LANG }

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[svn:einsteintoolkit] NullGrid/trunk/ (Rev. 7)
by schnetter＠cct.lsu.edu 23 Nov '11

23 Nov '11

User: eschnett Date: 2011/11/23 01:13 PM Modified: /trunk/ configuration.ccl Log: Correct syntax error File Changes: Directory: /trunk/ ================== File [modified]: configuration.ccl Delta lines: +1 -1 =================================================================== --- trunk/configuration.ccl 2011-10-25 18:45:29 UTC (rev 6) +++ trunk/configuration.ccl 2011-11-23 19:13:33 UTC (rev 7) @@ -2,7 +2,7 @@ REQUIRES THORNS: Fortran -PROVIDES: NullGrid +PROVIDES NullGrid { LANG }

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[svn:einsteintoolkit] manifest/trunk/ (Rev. 149)
by jfaber＠einsteintoolkit.org 22 Nov '11

22 Nov '11

User: jfaber Date: 2011/11/22 11:34 PM Modified: /trunk/ einsteintoolkit.bib Log: Just bringing a few eprint entries into line with our style File Changes: Directory: /trunk/ ================== File [modified]: einsteintoolkit.bib Delta lines: +10 -17 =================================================================== --- trunk/einsteintoolkit.bib 2011-11-18 16:45:53 UTC (rev 148) +++ trunk/einsteintoolkit.bib 2011-11-23 05:34:35 UTC (rev 149) @@ -225,7 +225,7 @@ volume = "52", year = "1995", pages = "2059-2082", - eprint = "gr-qc/9503025", + eprint = "arXiv:gr-qc/9503025", doi = "10.1103/PhysRevD.52.2059", SLACcitation = "%%CITATION = GR-QC/9503025;%%" } @@ -239,7 +239,7 @@ volume = "56", year = "1997", pages = "842-858", - eprint = "gr-qc/9610057", + eprint = "arXiv:gr-qc/9610057", doi = "10.1103/PhysRevD.56.842", SLACcitation = "%%CITATION = GR-QC/9610057;%%" } @@ -544,8 +544,7 @@ volume = "59", year = "1999", pages = "024007", - eprint = "gr-qc/9810065", - archivePrefix = "arXiv", + eprint = "arXiv:gr-qc/9810065", doi = "10.1103/PhysRevD.59.024007", SLACcitation = "%%CITATION = GR-QC/9810065;%%" } @@ -1176,7 +1175,7 @@ pages = "084024", doi = "10.1103/PhysRevD.65.084024", year = "2002", - eprint = "gr-qc/0110047", + eprint = "arXiv:gr-qc/0110047", } # was: Font:2008aa @@ -1874,9 +1873,7 @@ pages = "064010", doi = "10.1103/PhysRevD.77.064010", year = "2008", - eprint = "0709.2160", - archivePrefix = "arXiv", - primaryClass = "gr-qc", + eprint = "arXiv:0709.2160 [gr-qc]", } @article{Marti:1991wi, @@ -2327,7 +2324,7 @@ pages = "493-525", doi = "10.1016/S0377-0427(99)00169-7", year = "1999", - eprint = "gr-qc/9904014", + eprint = "arXiv:gr-qc/9904014", SLACcitation = "%%CITATION = GR-QC/9904014;%%" } @@ -2401,7 +2398,7 @@ pages = "023002", doi = "10.1103/PhysRevD.58.023002", year = "1998", - eprint = "gr-qc/9805026", + eprint = "arXiv:gr-qc/9805026", } @article{Shibata:1999wm, @@ -2454,7 +2451,7 @@ pages = "024033", doi = "10.1103/PhysRevD.67.024033", year = "2003", - eprint = "gr-qc/0301103", + eprint = "arXiv:gr-qc/0301103", } @article{Shibata:2003ga, @@ -2466,9 +2463,7 @@ pages = "084020", doi = "10.1103/PhysRevD.68.084020", year = "2003", - eprint = "gr-qc/0310030", - archivePrefix = "arXiv", - primaryClass = "gr-qc", + eprint = "arXiv:gr-qc/0310030", } @Article{Shibata:2004kb, @@ -2921,9 +2916,7 @@ pages = "389-396", doi = "10.1046/j.1365-8711.2001.04115.x", year = "2001", - eprint = "astro-ph/9908359", - archivePrefix = "arXiv", - primaryClass = "astro-ph", + eprint = "arXiv:astro-ph/9908359", } ##Z ############################################################################

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[svn:einsteintoolkit] www/about/developers/ (Rev. 748)
by knarf＠cct.lsu.edu 22 Nov '11

22 Nov '11

User: knarf Date: 2011/11/22 11:24 PM Modified: /about/developers/ index.php Log: don't show Michael here anymore File Changes: Directory: /about/developers/ ============================= File [modified]: index.php Delta lines: +2 -2 =================================================================== --- about/developers/index.php 2011-11-10 20:21:32 UTC (rev 747) +++ about/developers/index.php 2011-11-23 05:24:33 UTC (rev 748) @@ -90,7 +90,7 @@ </table> -<h2>Technical Support</h2> + <!--<a name="maintainers"></a> <h2>Einstein Toolkit Maintainers</h2>

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[svn:einsteintoolkit] Paper_EinsteinToolkit_2010/ (Rev. 247)
by knarf＠cct.lsu.edu 22 Nov '11

22 Nov '11

User: knarf Date: 2011/11/22 11:09 PM Modified: / TODO Log: revive todo File Changes: Directory: / ============ File [modified]: TODO Delta lines: +7 -17 =================================================================== --- TODO 2011-11-18 12:24:53 UTC (rev 246) +++ TODO 2011-11-23 05:09:00 UTC (rev 247) @@ -1,17 +1,7 @@ -Josh (atm) : references! -Ian Hinder : Expand section on Kranc, a bit -Christian Ott: Curvature evolution looks good -Josh : GRHydro -Christian EOS -Peter : Tools not ready (puncture and star tracker, but into analysis) -Roland : Merge AMR sections (4.2 and 5.8.3 currently) -Peter : ready to be committed -Frank : highly perturbed ok, but slitely perturbed would be better, needs work -Bruno : data "ready" but might need some tweaks. Judging from the - waveform convergence, another run is needed. Right now - the convergence rate seems to be oscillating, so by chance - we got an 8th-order convergence. That suggests that the - low resolution run wasn't in the convergence regime. -Christian : some data is there, needs to be committed -Frank : Future Work -Frank : Fix structure of 5.3 +Maybe cite: + +http://adsabs.harvard.edu/abs/2011ApJ...737....6S +http://adsabs.harvard.edu/abs/2010PThPh.124..331S +http://adsabs.harvard.edu/abs/2010CQGra..27k4107S +http://adsabs.harvard.edu/abs/2011PThPh.125.1255S +

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New changesets in Carpet Mercurial
by Carpet mercurial repositories 22 Nov '11

22 Nov '11

changeset: 3392:52e9abd0c256 tag: tip user: Erik Schnetter <schnetter(a)cct.lsu.edu> date: Tue Nov 22 13:47:41 2011 -0500 summary: Carpet: Recursive load balancing: Renumber components

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