NEK5000

a fast and scalable high-order solver for computational fluid dynamics

High-order methods have the potential to overcome the current limitations of standard CFD solvers. For this reason, we have been developing and improving the spectral element code NEK5000 for more than 30 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.

 

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Highlights

  • Incompressible and low Mach-number Navier-Stokes
  • Spectral element disrectization
  • Runs on all POSIX compliant operating systems
  • Written in Fortran77 and C
  • Proven scalability to over a million ranks using pure MPI for parallelization
  • Easy-to-build with minimal dependencies
  • 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