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Rank stepping can now be done at the cs_file block level, rather
than impacting the full block to part ditribution, allowing block
steps for IO while distributing blocks over all ranks for the
algorithmic part.

Also replace minimum MPI-IO block size by cs_parall_get_min_coll_buf_size.

* This avoids using both systems, and since the rank step must be known
  when opening a file, the minimum buffer size, though intended for IO,
  did not make that much sense, or would have required more advanced
  prediction.
* cs_parall_get_min_coll_buf_size may very well be also removed in a
  future version, as further optimizing cs_all_to_all functions
  with heuristics seems a more general approach.
deb9764

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README.md

General Information

This directory contains the code_caturne CFD tool, EDF's general purpose Computational Fluid Dynamics (CFD) software.

The basic capabilities of code_saturne enable the handling of either incompressible or expandable flows with or without heat transfer and turbulence. Dedicated modules are available for specific physics such as radiative heat transfer, combustion (gas, coal, heavy fuel oil, ...), magneto-hydrodynamics, compressible flows, two-phase flows (Euler-Lagrange approach with two-way coupling), or atmospheric flows.

Presentation

code_saturne is portable on all Linux flavors and UNIX platforms tested so far. It runs in parallel with MPI on distributed memory machines (Intel, Cray X series, IBM Power, ...). Developed since 1997 at EDF R&D, it is based on a co-located Finite Volume approach that accepts meshes with any type of cell (tetrahedral, hexahedral, prismatic, pyramidal, polyhedral...) and any type of grid structure (unstructured, block structured, hybrid, conforming or with hanging nodes, ...).

Meshes may be imported using the CGNS, MED, GMSH, I-Deas, GAMBIT, or Simail formats, and Post-processing output is available in EnSight, CGNS and MED formats. In-situ postprocessing is available using the ParaView Catalyst and Melissa libraries.

code_saturne can be coupled in parallel to EDF's thermal software SYRTHES (conjugate heat transfer). It can also produce output usable by EDF's structural analysis software code_aster, in particular in the SALOME platform. SYRTHES and code_aster are developed by EDF and distributed under a GNU GPL licence. The atmospheric model can include chemistry modeling based on the SSH-aerosol library.

Copying

code_saturne is distributed under the GNU General Public Licence, v2, or (at your option) any later version.

See the COPYING file for details.

Installation

Installation from source files can be done either through a semi-automatic install_saturne.py script, directly by using GNU-Autotools-based scripts, or by a combination thereof.

Install instructions (from source) are provided in the accompanying INSTALL.md file.

Code_Saturne support: saturne-support@edf.fr

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