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RELEASE.md

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Release v19.0-rc2

What is new?

  • Uncoupled multisession (neknek) simulations
  • Gather scatter operations across sessions
  • Gather scatter options across gtp-planes
  • par file support for postnek
  • mkSIZE to automatically create SIZE file
  • Object and boundary handling
  • RANS k-Omega and k-Omega-SST (experimental)
  • Online mesh-smoother (experimental)
  • ElapsedTime option for writeControl (in par)
  • Print runtime-statistics every 100 steps
  • Support for GNU 8.x compilers
  • Support for Cray compilers
  • Support for ARM compilers
  • Add AVM regularization for scalars (experimental)
  • FEM_AMG precoditioner (experimental) p40=3
  • SEMG_AMG_HYPRE precoditioner (experimental) p40=2
  • CHT support for generic fld reader
  • Overwrite core routines in usr
  • Lagrangian phase model - LPM (experimental)
  • Distributed gllnid/gllel
  • Add parMetis partitioner
  • Add parRSB partitioner
  • Add CGNS mesh converter
  • Support p0th with Helmholtz
  • Various bug fixes

What you may have to change to be compatible

  • Remove PPLIST symbol NEKNEK (not required anymore)
  • Use valint instead of ubc in userbc for neknek
  • Remove multimesh_create call from usr file (not required anymore)
  • Adjust calls to interpolation wrapper according to new interface in interp.f
  • Remove common block CTORQ from usr (now part of OBJDATA included in TOTAL)
  • Use nekamg_setup tool instead of amg_hypre (required for semg_amg preconditioner)
  • Your parameters to the reserved user space param(170) - param(200)
  • Set lelr in SIZE for a restart using muliple files (check value in hdr)
  • Use planar_avg() instead of planar_average_z etc.

Known Bugs

562, 65

Thanks to our Contributors

We are grateful to all who added new features, filed issues or helped resolve them, asked and answered questions, and were part of inspiring discussions.