Journal
INTERNATIONAL JOURNAL OF HIGH PERFORMANCE COMPUTING APPLICATIONS
Volume 36, Issue 5-6, Pages 568-586Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/10943420221116056
Keywords
COVID-19; computational fluid dynamics; building cube method; immersed boundary method; dirty CAD; droplet; aerosol transmission; societal behavioral change
Categories
Funding
- HPCI System Research Project [hp210086, hp210242, hp210262]
- Fugaku's COVID-19 project by MEXT
- Riken
- JST CREST Grant, Japan [JPMJCR20H7]
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The Fugaku supercomputer has revolutionized epidemiology and changed the behavior of the Japanese public by providing detailed analysis of COVID-19 transmission risks. Its innovative aerosol simulation method, utilizing a new CFD solver, allows for high-resolution simulations and rapid generation of digital twins representing various societal situations.
The fastest supercomputer in 2020, Fugaku, has not only achieved digital transformation of epidemiology in allowing end-to-end, detailed quantitative modeling of COVID-19 transmissions for the first time but also transformed the behavior of the entire Japanese public through its detailed analysis of transmission risks in multitudes of societal situations entailing heavy risks. A novel aerosol simulation methodology was synthesized out of a combination of a new CFD methods meeting industrial demands in the solver, CUBE (Jansson et al., 2019), which not only allowed the simulations to scale massively with high resolution required for micrometer virus-containing aerosol particles but also enabled extremely rapid time-to-solution due to its ability to generate the digital twins representing multitudes of societal situations in a matter of minutes, attaining true overall application high performance; such simulations have been running for the past 1.5 degrees years on Fugaku, cumulatively consuming top supercomputer-class resources and the communicated by the media as well as becoming the basis for official public policies.
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