User: knarf Date: 2012/01/09 10:53 AM

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Log: add ians talk

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File [added]: index.php Delta lines: +45 -0 =================================================================== --- seminars/2012_01_16/index.php (rev 0) +++ seminars/2012_01_16/index.php 2012-01-09 16:53:45 UTC (rev 774) @@ -0,0 +1,45 @@ +<?php $title='A conservation law formulation of nonlinear elasticity in general relativity'; +include_once($_SERVER['DOCUMENT_ROOT'].'/global/header.php');?> + +<h3>Monday, January 16, 2012, 10am US central time</h3> +<p>The <a href="http://evo.caltech.edu/evoNext/koala.jnlp?meeting=eIe9esvvv8anaiatII"><i>Einstein Toolkit weekly</i></a> EVO meeting will be used for audio and slides. The talk is based +on this <a href="http://lanl.arxiv.org/abs/1107.2551">paper</a>. +</p> + + +<h3>Abstract</h3> +<p> +We present a practical framework for ideal hyperelasticity in numerical +relativity. For this purpose, we recast the formalism of Carter and Quintana as +a set of Eulerian conservation laws in an arbitrary 3+1 split of spacetime. The +resulting equations are presented as an extension of the standard Valencia +formalism for a perfect fluid, with additional terms in the stress-energy +tensor, plus a set of kinematic conservation laws that evolve a configuration +gradient. We prove that the equations can be made symmetric hyperbolic by +suitable constraint additions, at least in a neighbourhood of the unsheared +state. We discuss the Newtonian limit of our formalism and its relation to a +second formalism also used in Newtonian elasticity. We validate our framework +by numerically solving a set of Riemann problems in Minkowski spacetime, as +well as Newtonian ones from the literature. +</p> + +<h3>Presenter: Ian Hawke</h3> +<img src="Zachariah_Etienne.jpg" width="20%" align="right" alt="Zachariah Etienne"> +<p> + Lecturer in the <a href="http://www.maths.soton.ac.uk/applied"> Applied Mathematics</a> + department of the <a href="http://www.maths.soton.ac.uk">School of Mathematics</a> + at the <a href="http://www.soton.ac.uk">University of Southampton</a>. +<p> + +<p>Research interests: + My primary interests are numerical simulations of Einstein's equations + coupled to hydrodynamic matter. I am one of the authors of the + <a href="http://www.whiskycode.org">Whisky</a> code which is used within the + <a href="http://www.eu-network.org">EU Network</a>. + I also contribute to the binary black hole simulations of the + <a href="http://numrel.aei.mpg.de">AEI Numerical Relativity group</a>. + I am also interested in mesh refinement codes such as + <a href="http://www.carpetcode.org">Carpet</a>. +</p> + +<?php include_once($_SERVER['DOCUMENT_ROOT'].'/global/footer.php');?>

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File [modified]: index.php Delta lines: +8 -0 =================================================================== --- seminars/index.php 2012-01-06 03:29:25 UTC (rev 773) +++ seminars/index.php 2012-01-09 16:53:45 UTC (rev 774) @@ -17,6 +17,14 @@ <td><a href="2011_11_28/EM_Gauge_ET.pdf">pdf</a></td> <td><a href="2011_11_28/recording/2011_11_28.ogv">ogv</a>&nbsp;/&nbsp;<a href="2011_11_28/recording/2011_11_28_evo.tar.xz">evo.tar.xz</a></td> </tr> + <tr> + <td>2012/01/16</td> + <td><a href="2012_01_16/">A conservation law formulation of nonlinear elasticity in general relativity</a></td> + <td>Ian&nbsp;Hawke</td> + <td>University&nbsp;of&nbsp;Southampton</td> + <td>&nbsp;</td> + <td>&nbsp;</td> + </tr> </table>

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