High-order methods have the potential to overcome the current limitations of standard CFD solvers. For this reason, we have been developing and improving our spectral element code for more than 35 years now. It features state-of-the-art, scalable algorithms that are fast and efficient on platforms ranging from laptops to the world’s fastest computers. Applications span a wide range of fields, including fluid flow, thermal convection, combustion and magnetohydrodynamics. Our user community includes hundreds of scientists and engineers in academia, laboratories and industry.

Latest Release
nekRS-v23.0.tar.gz       nek5000-v19.0.tar.gz


  • Incompressible and low Mach-number Navier-Stokes
  • Spectral element disrectization
  • High-order conformal curved quadrilateral/hexahedral meshes
  • Semi-implicit 2nd/3rd order adaptive timestepping
  • Conjugate fluid-solid heat transfer
  • Efficient preconditioners
  • Parallel I/O
  • Lagrangian phase model
  • Moving and deforming meshes
  • Overlapping overset grids
  • Basic meshing tools including converters
  • LES and RANS turbulence models
  • VisIt & Paraview support for data analysis and visualization