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Chair:
Sylvain Laizet (Imperial College London)*
The UK is preparing for the exascale era through the ExCALIBUR programme to develop exascale-ready algorithms and software. To continue to make scientific advances on some of the most challenging physical problems facing the world today, such as weather forecasting, engine design, astrophysics, particle physics and fusion energy, it is essential that the UK fully harnesses the power of the world’s most powerful supercomputers as we move into the exascale era and beyond. However, this cannot be achieved without appropriate software: existing simulation codes will not perform effectively on the next generation of supercomputers. ExCALIBUR is a UK research programme that aims to deliver the next generation of highperformance simulation software for the highest-priority fields in UK research, redesigning high priority computer codes and algorithms to meet the demands of both advancing technology and UK research. This mini-symposium will present the scientific outcomes of the Design and Development Working Group (DDWG) targeting turbulent flow simulations at the exascale within the ExCALIBUR initiative. It will showcase how several UK flow solvers have been reengineered to meet the challenges associated with exascale computing while taking advantage of the significant opportunities afforded by exascale systems. The mini-symposium will focus on four high-priority use cases, defined as high quality, high impact research made possible by a step-change in simulation performance. The use cases are targeting wind energy, green aviation, air quality and net-zero combustion. Exascale computing will be a game changer in these areas and will contribute to make the UK a greener nation (The UK commits to net zero carbon emissions by 2050).
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