Panel on high performance computing; Exascale CFD plan in JAEA-CCSE: Towards digital twin of urban wind environment

Hasegawa, Yuta   

We explain the research plan for the exascale computational fluid dynamics (CFD) in Japan Atomic Energy Agency, Center for Computational Science and e-Systems (JAEA-CCSE). JAEA-CCSE has been promoting the development of 1m scale real-time urban wind simulation code, "CityLBM." In this presentation, we show our past studies that accelerate the CFD code, and our recent research which introduces ensemble data assimilation toward the digital twin of the urban wind. The outlook for the exascale computing with them is also described.