Title: Distributed nested streamed models of tsunami waves
Authors: Kensaku Hayashi; Alexander Vazhenin; Andrey Marchuk
Addresses: Department of Information Systems, University of Aizu, Aizuwakamatsu, Japan ' Department of Information Systems, University of Aizu, Aizuwakamatsu, Japan ' Tsunami Laboratory, ICMMG SB RAS, Novosibirsk, Russia
Abstract: This research focuses on designing a high-speed scheme for tsunami modelling using nested computing. Computations are carried out on a sequence of grids composed of geographical areas with resolutions where each is embedded within another. This decreases the total number of calculations by excluding unimportant coastal areas from the process. The paper describes the distributed streaming computational scheme allowing for flexible reconfiguration of heterogeneous computing resources with a variable set of modelling zones. Computations are implemented by distributing these areas over modelling components and by synchronising the transitions of boundary data between them. Results of numerical modelling experiments are also presented.
Keywords: tsunami modelling; nested grids; distributed systems; coarse-grained parallelisation; streaming computing; communicating processes; process synchronisation; task parallelism; programming model; component-based software engineering.
International Journal of Computational Science and Engineering, 2020 Vol.23 No.2, pp.124 - 135
Received: 08 Apr 2019
Accepted: 16 Aug 2019
Published online: 23 Oct 2020 *