106750 20220301144156.0 doi 10.2166/hydro.2020.032 sideral 120500 ART-2020-120500 eng Echeverribar, I. Analysis of the performance of a hybrid CPU/GPU 1D2D coupled model for real flood cases 2020 Access copy available to the general public Unrestricted Coupled 1D2D models emerged as an efficient solution for a two-dimensional (2D) representation of the floodplain combined with a fast one-dimensional (1D) schematization of the main channel. At the same time, high-performance computing (HPC) has appeared as an efficient tool for model acceleration. In this work, a previously validated 1D2D Central Processing Unit (CPU) model is combined with an HPC technique for fast and accurate flood simulation. Due to the speed of 1D schemes, a hybrid CPU/GPU model that runs the 1D main channel on CPU and accelerates the 2D floodplain with a Graphics Processing Unit (GPU) is presented. Since the data transfer between sub-domains and devices (CPU/GPU) may be the main potential drawback of this architecture, the test cases are selected to carry out a careful time analysis. The results reveal the speed-up dependency on the 2D mesh, the event to be solved and the 1D discretization of the main channel. Additionally, special attention must be paid to the time step size computation shared between sub-models. In spite of the use of a hybrid CPU/GPU implementation, high speed-ups are accomplished in some cases. info:eu-repo/grantAgreement/ES/MICINN-FEDER/PGC2018-094341-B-I00 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 2.376 2020 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS 68 / 112 = 0.607 2020 Q3 T2 WATER RESOURCES 59 / 97 = 0.608 2020 Q3 T2 ENVIRONMENTAL SCIENCES 181 / 272 = 0.665 2020 Q3 T3 ENGINEERING, CIVIL 72 / 136 = 0.529 2020 Q3 T2 0.654 2020 Atmospheric Science 2020 Q2 Water Science and Technology 2020 Q2 Geotechnical Engineering and Engineering Geology 2020 Q2 Civil and Structural Engineering 2020 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Morales-Hernandez, M. Universidad de Zaragoza (orcid)0000-0001-6961-7250 Brufau, P. Universidad de Zaragoza (orcid)0000-0002-0415-0001 Garcia-Navarro, P. Universidad de Zaragoza (orcid)0000-0001-8674-1042 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 22, 5 (2020), 1198-1216 J. hydroinform. JOURNAL OF HYDROINFORMATICS 1464-7141 660272 http://zaguan.unizar.es/record/106750/files/texto_completo.pdf Postprint 1877873 http://zaguan.unizar.es/record/106750/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:106750 articulos driver 2022-03-01-14:38:09 ARTICLE