Neko v1.0.0
05 Dec 2025 - neko
This is a major release introducing several significant changes in terms of features and functionalities, user interaction, and code improvements.
Release Notes
Changelog
Major updates / features
- Support for multiple (arbitrary number of) scalars.
- Support for scalar statistics and averaging any registered field.
- New matrix-free algebraic hp-multigrid preconditioner.
- C API with bindings for Python and Julia.
- Native global interpolation, supporting both CPU and GPU backends.
- Support for Collective Communication libraries on accelerators (NCCL/RCCL), both for reductions and point to point communication during gather-scatter operations.
- Support for injection of components. Currently supported: Source terms, Simulation components, LES models, and Wall Models.
- Support for cyclic boundary conditions.
- Simulation components:
- Support for differential operators
gradient,curlanddivergence. - Full support for LES models on all backends.
- Support for differential operators
- Source terms:
- Application of a centrifugal force
- Support for application of a sponge source term based on a reference velocity field.
Minor changes / fixes
- Registries, both scratch and global registry now supports vector and matrix types.
- Gradient jump penalisation is put under the source term umbrella.
- The
elementwise_averageapproach to estimate the filter lengthscale in LES is changed from average length evenly shared by each GLL point to average GLL spacing. - Simulation components:
vorticityis removed and replaced by the more generalcurloperator.
- Source terms:
user_pointwiseis removed.user_vectoris replaced by theusersource term.
Full Changelog: https://github.com/ExtremeFLOW/neko/compare/v0.9.1…v1.0.0
Breaking API changes
A couple of features of Neko have been overhauled. This mean previous user files will need updates to support Neko v1.0
- The case file structure has been updated.
- The interface of user files have been updated.
- Global registry of fields
neko_field_registryhave been renamedneko_registry.
/ᐠ. 。.ᐟ\ᵐᵉᵒʷˎˊ˗