Describes Neko, a high-order spectral element flow solver framework.
Based on your request, the most relevant scientific paper referencing "Neko" from 2021 is: Neko_2021_Jan_to_Aug_tier_2.zip
Authors: S. K. F. L. S. H. K. P. P. R. A. C. S. Published: July 2021 (arXiv) Describes Neko, a high-order spectral element flow solver
(Published in ACM conference, 2021).
Another potential match in the 2021 timeframe, though focused on AI rather than CFD, is: Neko_2021_Jan_to_Aug_tier_2.zip