Exploring the Ultimate Regime of Turbulent Rayleigh-Bénard Convection Through Unprecedented Spectral-Element Simulations
Jansson N, Karp M, Perez A, Mukha T, Ju Y, Liu J, Páll S, Laure E, Weinkauf T, Schumacher J, Schlatter P, Markidis S (2023)
Publication Language: English
Publication Type: Conference contribution
Publication year: 2023
Publisher: Association for Computing Machinery, Inc
City/Town: New York, NY
Conference Proceedings Title: Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis, SC 2023
Event location: Denver, CO
ISBN: 9798400701092
Abstract
We detail our developments in the high-fidelity spectral-element code Neko that are essential for unprecedented large-scale direct numerical simulations of fully developed turbulence. Major innovations are modular multi-backend design enabling performance portability across a wide range of GPUs and CPUs, a GPU-optimized preconditioner with task overlapping for the pressure-Poisson equation and in-situ data compression. We carry out initial runs of Rayleigh-Bénard Convection (RBC) at extreme scale on the LUMI and Leonardo supercomputers. We show how Neko is able to strongly scale to 16,384 GPUs and obtain results that are not possible without careful consideration and optimization of the entire simulation workflow. These developments in Neko will help resolving the long-standing question regarding the ultimate regime in RBC.
Authors with CRIS profile
Involved external institutions
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
Rechenzentrum Garching der Max-Planck-Gesellschaft (MPCDF) / Max Planck Computing & Data Facility
Germany (DE)
Technische Universität Ilmenau
Germany (DE)
Sweden (SE)
Rechenzentrum Garching der Max-Planck-Gesellschaft (MPCDF) / Max Planck Computing & Data Facility
Germany (DE)
Technische Universität Ilmenau
Germany (DE)
How to cite
APA:
Jansson, N., Karp, M., Perez, A., Mukha, T., Ju, Y., Liu, J.,... Markidis, S. (2023). Exploring the Ultimate Regime of Turbulent Rayleigh-Bénard Convection Through Unprecedented Spectral-Element Simulations. In Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis, SC 2023. Denver, CO, US: New York, NY: Association for Computing Machinery, Inc.
MLA:
Jansson, Niclas, et al. "Exploring the Ultimate Regime of Turbulent Rayleigh-Bénard Convection Through Unprecedented Spectral-Element Simulations." Proceedings of the 2023 International Conference for High Performance Computing, Networking, Storage and Analysis, SC 2023, Denver, CO New York, NY: Association for Computing Machinery, Inc, 2023.
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