ZiF Workshop

Advanced parallel-in-time algorithms for computer simulations in physical sciences, social sciences and engineering

Date: 20 - 24 May 2019
Convenors: Daniel Ruprecht (Leeds, GBR), Robert Speck (Jülich, GER), Sebastian Schöps (Darmstadt, GER)

Computer simulations are heavily used in all areas of the physical sciences as well as in engineering and are becoming increasingly important in the social sciences. Because models are often based on differential equations, the used algorithms are usually similar despite the differences in the modelled application. The complexity of many real-world problems means that often high-performance computing is required to run simulations with acceptable solution times. However, the trend towards extreme parallelism (modern high-performance computers have millions of processors) makes developing the necessary numerical algorithms challenging. More than ever, the development of efficient algorithms requires close collaboration across disciplines.

Therefore, our workshop on 'Advanced Parallel-in-time Algorithms for Computer Simulations in Physical Sciences, Social Sciences and Engineering' was aiming to foster this interdisciplinary exchange and to bring together applied mathematicians who develop and analyze algorithms, computer scientists who devise efficient implementations as well as domain scientists who are experts in the targeted application.

With 53 participants from 12 different countries, including Japan, the US and Canada, the workshop turned out to be extremely popular. It was the 8th event of a series going back to 2011, when a first workshop was held in Lugano, Switzerland, with only 10 attendees. While previous workshops focussed mostly on applications in the physical sciences, in line with the interdisciplinary tradition of ZiF, this year's workshop broadened the scope by including computational social sciences as well es engineering. The plenary talks by Marie-Therese Wolfram from University of Warwick on modelling crowds of people and the plenary talk by Oliver Rain from Robert Bosch GmbH on modelling electric machines were very well received and stimulated lots of discussion during coffee breaks. Hopefully, this will lead to new fields where modern parallel-in-time algorithms are used to improve computer-based models.

Three other plenary talks highlighted applications and mathematical developments of parallel-in-time algorithms: Jemma Shipton reported on a research project aiming to incorporate them into the UK Met Office's weather prediction model whereas Eric Aubanel presented research to use parallel-in-time integration for simulations of large scale fluid flow. Finally, Carmen Rodrigo presented new mathematical results on the development of a new class of algorithms.

Plenary talks were complemented by a total of 23 contributed talks, spanning the range from mathematical analysis proving theorems to attempts of adopting parallel-in-time algorithms for control of robots. Furthermore, participants were treated to a guided tour through Bielefeld?s old town and a dinner at the Brauhaus Johann Albrecht. A special issue with proceedings papers will be published in Springers Computing and Visualization in Science.

Daniel Ruprecht, Robert Speck, Sebastian Schöps

Conference Programme

Wisdom Agboh (Leeds, GBR), Giancarlo Antonino Antonucci (Oxford, GBR), Eric Aubanel (Fredericton, N.B., CAN), Christian Bahls (Rostock, GER), Pietro Benedusi (Lugano, SUI), Sergiy Bogdanov (Wuppertal, GER), Matthias Bolten (Wuppertal, GER), James Brannick (University Park, USA), Gayatri Čaklović (Jülich, GER), Andrew Clarke (Leeds, GBR), Anna Clevenhaus (Wuppertal, GER), Jonas Dünnebacke (Dortmund, GER), Araz Eghbal (Fredericton, CAN), Abram Ellison (Boulder, USA), Robert D. Falgout (Livermore, USA), Stephanie Friedhoff (Wuppertal, GER), Martin J. Gander (Genf, SUI), Andrew Gerber (Fredericton, N.B., CAN), Sebastian Götschel (Berlin, GER), Derek Groen (Uxbridge, Middlesex, GBR), Michael Günther (Wuppertal, GER), Jens Hahne (Wuppertal, GER), Marvin-Lucas Henkel (Wuppertal, GER), Andreas Hessenthaler (Stuttgart, GER), Johan Hidding (Amsterdam, NED), Mikio Iizuka (Fukuoka, JPN), Natkunam Kokulan (London, GBR), Iryna Kulchytska-Ruchka (Darmstadt, GER), Thibaut Lunet (Genf, SUI), Peter Meismirel (Lund, SWE), Michael L. Minion (Berkeley, USA), Atsuhiro Miyagi (Yokohama, JPN), Hieu Huu Nguyen (Austin, USA), Van Thanh Nguyen (Paris, FRA), Benjamin Ong (Houghton, USA), Kenji Ono (Fukuoka, JPN), Benedict Philippi (Kiel, GER), Oliver Rain (Renningen, GER), Hannah Rittich (Jülich, GER), Carmen Rodrigo (Zaragoza, ESP), Debasmita Samaddar (Oxfordshire, GBR), Giovanni Samaey (Heverlee, BEL), Ruth Schöbel (Jülich, GER), Martin Schreiber (Garching, GER), Jacob Schroder (Albuquerque, USA), Jemma Shipton (London, GBR), Krasymyr Tretiak (Leeds, GBR), Alba Troci (Jülich, GER), Ken Trotti (Como, ITA), Marie-Therese Wolfram (Coventry, GBR)

Please direct questions concerning the organisation of the workshop to Trixi Valentin at the Conference Office. Questions regarding scientific content and contributions should be directed to the organizers.

Tel: +49 521 106-2769
Fax: +49 521 106-152769
E-Mail: trixi.valentin@uni-bielefeld.de