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VERSION:2.0
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BEGIN:VEVENT
SUMMARY:GR-Athena++: Puncture evolutions on vertexcentered oct-tree AMR an
 d compact finite differencing
DTSTART:20230615T143000Z
DTEND:20230615T160000Z
DTSTAMP:20260723T003432Z
UID:6aff5942-d6ff-4493-a899-b939f3f53ee0
SEQUENCE:1
CREATED:20230607T114810Z
DESCRIPTION: ABSTRACT: GR-Athena++ is a general-relativistic\, high-order\
 , vertex-centered solver that extends the oct-tree\, adaptive mesh refinem
 ent capabilities of Athena++. Dynamical spacetimes are simulated using the
  Z4c formulation of numerical relativity coupled to the moving puncture ga
 uge. Robust and accurate binary black hole (BBH) mergers are demonstrated.
  GR-Athena++ leverages the task-based parallelism paradigm of Athena++ to 
 achieve excellent scalability. Strong scaling efficiencies above 95% for u
 p to 1.2×1e4 CPUs and excellent weak scaling up to 1e5 CPUs are measured 
 for production BBH runs. GR-Athena++ provides infrastructure for the robus
 t simulation of compact binary coalescences and offers a viable path towar
 ds numerical relativity at exascale. In this talk\, a general overview of 
 features outlined above will be provided. Recent developments will also be
  discussed together with our incorporation of compact finite differencing 
 for vacuumsector evolution.  
LAST-MODIFIED:20230607T114810Z
LOCATION:Sala de Seminários do DF\,  Pavilhão de Física\, 2º piso
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/gr-athena-puncture-evoluti
 ons-on-vertexcentered-oct-tree-amr-and-compact-finite-differencing/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="r55v1"> <b>ABSTRACT</b>: G
 R-Athena++ is a general-relativistic\, high-order\, vertex-centered solver
  that extends the oct-tree\, adaptive mesh refinement capabilities of Athe
 na++. Dynamical spacetimes are simulated using the Z4c formulation of nume
 rical relativity coupled to the moving puncture gauge. Robust and accurate
  binary black hole (BBH) mergers are demonstrated. <br/><br/>GR-Athena++ l
 everages the task-based parallelism paradigm of Athena++ to achieve excell
 ent scalability. Strong scaling efficiencies above 95% for up to 1.2×1e4 
 CPUs and excellent weak scaling up to 1e5 CPUs are measured for production
  BBH runs. GR-Athena++ provides infrastructure for the robust simulation o
 f compact binary coalescences and offers a viable path towards numerical r
 elativity at exascale. <br/><br/>In this talk\, a general overview of feat
 ures outlined above will be provided. Recent developments will also be dis
 cussed together with our incorporation of compact finite differencing for 
 vacuumsector evolution.  </p>
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