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RELEASE.md

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Release 17.0.0-dev

Major Features and Improvements

  • New paramater file .par (replacing .rea)
  • Added OIFS for moving mesh
  • Added Moving mesh for PN/PN
  • Improved stability for varying visosity and PN/PN
  • Added support for mixed Helmholtz/CVODE solves
  • New fast AMG setup tool based on HYPRE
  • New EXODUSII mesh converter
  • New interface to libxsmm (fast MATMUL library).
  • Extended lowMach solver for time varying thermodynamic pressure
  • Added DG for scalars
  • Added support for implicit none in .usr file
  • Reduced solver initilization time (parallel binary reader for .re2 and .ma2)
  • Restart from arbitrary fld-file (multiple files not supported) using interpolation
  • Optional new user friendly SIZE file format (see SIZE.template)
  • Refactored NEKNEK

Backwards-Incompatible Changes

  • When p20>0 use it as solver tolerance for temperature instead of p22 (only for Helmholtz)
  • Replaced usr interpolation wrapper intpts() by intp() with a different interface
  • Replaced g2gi() by new generic fld reader gfldr()
  • Moved makenek from core to bin folder
  • Removed MOAB support
  • Replaced hpts.in/hpts.out by <casename>.his
  • Eliminated PPLIST symbol MPIIO as it is enabled by default now (only active if p65=1 or nfiler=1)
  • Eliminated PPLIST symbol AMG_DUMP as we dump the files automatically if they don't exist
  • Eliminated PPLIST symbol AMG as it is a runtime parameter now (rea:p40 or par:preconditoner=semg_amg in PRESSURE section)

Bug Fixes and Other Changes

  • Use rank id to tag MPI message instead of global element
  • Fix periodic BC bug of genmap when using more than 1M elemtents
  • Many bug fixes

Thanks to our Contributors

This release contains contributions from the Nek5000 core developers, as well as:

@ggiannako, @nicooff, @kmittal2, @cliosaglietti, @EvelynOtero, @mattiabr, @maxhutch, @hackljf, @negips

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