Einstein Toolkit Workshop 2015

11 Aug 2015, 11:00 → 14 Aug 2015, 18:00 Europe/Stockholm

FB51 & FB52 (AlbaNova)

Axel Brandenburg, Oleg Korobkin, Stephan Rosswog

Scope

This workshop is centered around the new developments in open source infrastructure in numerical relativity and relativistic astrophysics. It aims to be an opportunity for current users and developers to report on recent progress in the Einstein Toolkit (including, but not limited to, new components), to express interests in future development, and to draw up a plan (collaborative as well as financial) to make sure this development takes place. The workshop will also feature an introductory session for new users, which will help to familiarize attendees with the Einstein Toolkit. We would also like to invite the local students from physics and computer science departments to participate.

Notice that this meeting will involve a few talks and status reports but will focus primarily on open discussions and planning.

Workshop page on the einsteintoolkit.org: https://docs.einsteintoolkit.org/et-docs/ET_Workshop_2015.

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Venue

NORDITA - Nordic Institute for Theoretical Physics (www.nordita.org)
AlbaNova University Center (www.albanova.se), Stockholm

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Schedule

Tue, 11	Time Presenter Title 13:30 - 14:00 Introduction and Welcome 14:00 - 18:00 Oleg Korobkin Tutorial: introduction to the Einstein Toolkit
Wed, 12	GRMHD 9:00 - 9:30 Wolfgang Kastaun New frameworks for equation of state and postprocessing 9:40 - 10:10 David Radice The WhiskyTHC code 10:20 - 10:50 Zachariah Etienne Overview of the IllinoisGRMHD code (*) 11:00 - 11:30 Coffee break Hardware & Software 11:30 - 12:00 Steven R. Brandt, David M. Koppelman Overview of Chemora: high-level framework for hierarchical code generation and optimization 12:00 - 12:30 Discussion 12:30 - 13:30 Lunch AMR 13:30 - 14:00 Zhoujian Cao Solving punctured multi black hole initial data with finite element method (*) 14:10 - 14:40 Bishop Mongwane High Order Mesh Refinement for Dynamical Space Times 14:50 - 15:20 Saran Tunyasuvunakool GRChombo: automatic mesh refinement for numerical relativity 15:30 - 16:00 Coffee break Various 16:00 - 16:30 Erik Schnetter Plans for fine-grained multi-threading in Cactus to improve efficiency and scalability (*) 16:40 - 17:00 Peter Diener New McLachlan code 17:10 - 17:30 Jonah Miller Visualizing Einstein Toolkit Data with yt (*)
Thu, 13	9:00 - 10:00 Lightning talks (speakers register on the spot, 5+5 each) 10:00 - 11:00 New developments for the Einstein Toolkit 11:00 - 11:30 Coffee break 11:30 - 12:30 New developments for the Einstein Toolkit (contd.) 12:30 - 14:00 Lunch 14:00 - 18:00 Open discussion on building a European ET network Parallel session (FB51)
Fri, 14	9:00 - 12:30 Open discussion on building a European ET network (including an ET School and Workshop in Europe for 2016) 12:30 - 14:00 Lunch 14:00 - 18:00 Steven R. Brandt Hands-on session on Chemora, a code generation and optimization framework 18:00 - 19:30 BBQ

(*) Talks marked with an asterisk will be given remotely.

Accommodation

The following hotels are located close to the venue and are offering special discounts for the participants of this workshop (all prices include breakfast and tax):

• Elite Hotel Arcadia (single rooms: 1197 SEK / night, double rooms: 1347 SEK / night)
• Crystal Plaza Hotel (single rooms: 975 SEK / night, double rooms: 1175 SEK / night)
• Biz Apartment Gärdet (single rooms: 925 SEK / night, double rooms: 1050 SEK / night)

All prices above include breakfast and taxes.

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Workshop organizers:

Eloisa Bentivegna	Università di Catania, Italy	eloisa.bentivegna -(at)- ct.infn.it
Axel Brandenburg	Nordita	brandenb -(at)- nordita.org
Bruno Giacomazzo	University of Trento, Italy	bruno.giacomazzo -(at)- unitn.it
Ian Hawke	University of Southampton, UK	I.Hawke -(at)- soton.ac.uk
Oleg Korobkin	SU, OKC	oleg.korobkin -(at)- astro.su.se
Frank Löffler	Louisiana State University, USA	knarf -(at)- cct.lsu.edu
Christian D. Ott	Caltech, USA	cott -(at)- tapir.caltech.edu
Stephan Rosswog	SU, OKC	stephan.rosswog -(at)- astro.su.se
Erik Schnetter	Perimeter Institute, Canada	eschnetter -(at)- perimeterinstitute.ca

Sponsored by:

pictures

• albanova-rainbow-2015-05-19.jpg
• brunnsviken.jpg
• nordita_main_building.png

Tuesday 11 August

13:30 → 14:00 Registration and Welcome

14:00 → 18:00 Tutorial: introduction to the Einstein Toolkit

Speakers: Ian Hinder, Oleg Korobkin

Wednesday 12 August

09:00 → 11:00 GRMHD

09:00 New frameworks for equation of state and postprocessing

Speaker: Wolfgang Kastaun

09:40 The WhiskyTHC code

Speaker: David Radice

10:20 Overview of the IllinoisGRMHD code (*)

Speaker: Zachariah Etienne

11:30 → 12:30 Hardware & Software

11:30 Overview of Chemora: high-level framework for hierarchical code generation and optimization

Speaker: Steven R. Brandt

12:00 Discussion

12:30 → 13:30 Lunch

13:30 → 15:30 AMR

13:30 Solving punctured multi black hole initial data with finite element method (*)

Speaker: Zhoujian Cao

14:10 High Order Mesh Refinement for Dynamical Space Times

Speaker: Bishop Mongwane

14:50 GRChombo: automatic mesh refinement for numerical relativity

In this talk, I will introduce GRChombo: a numerical relativity code which is capable of performing adaptive mesh refinement (AMR) in a fully automated manner. Our code implements the tried-and-tested BSSN/CCZ4 formalisms on top of a modern C++ framework provided by the Chombo AMR library. This allows many problems to be set up much more straightforwardly, whilst still achieving good parallel performance. I will also discuss additional tools which we have recently developed as part of the package and some of the science that we are currently looking at using GRChombo.

Speaker: Saran Tunyasuvunakool

15:30 → 16:00 Coffee break

16:00 → 18:00 Various

16:00 Visualizing Einstein Toolkit Data with yt (*)

Speaker: Jonah Miller

16:40 New McLachlan code

Speaker: Peter Diener

17:20 Plans for fine-grained multi-threading in Cactus to improve efficiency and scalability (*)

Speaker: Erik Schnetter

Thursday 13 August

09:00 → 11:00 New developments for the Einstein Toolkit

Open discussion

11:00 → 11:30 Coffee break

11:30 → 12:30 Lightning talks (speakers register on the spot, 5+5 each)

12:30 → 13:30 Lunch

14:00 → 18:00 Open discussion on building a European ET network (including an ET School and Workshop in Europe for 2016)

Friday 14 August

09:00 → 12:30 Open discussion on building an European ET network

12:30 → 13:30 Lunch

14:00 → 18:00 Hands-on session on Chemora, a code generation and optimization framework

Speaker: Steven Brandt