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Code_Saturne is open-source multi-purpose CFD software, primarily developed by EDF R&D and maintained by them. It relies on the Finite Volume method and a collocated arrangement of unknowns to solve the Navier-Stokes equations, for incompressible or compressible flows, laminar or turbulent flows and non-Newtonian and Newtonian fluids. A new discretisation based on the Compatible Discrete Operator (CDO) approach can be used for some physics. A highly parallel coupling library (Parallel Locator Exchange - PLE) is also available in the distribution to couple other physics, such as conjugate heat transfer and structural mechanics. For the incompressible solver, the pressure is solved using an integrated Algebraic Multi-Grid algorithm and the scalars are computed by conjugate gradient methods or Gauss-Seidel/Jacobi.
The original version of the code is written in C for pre-/post-processing, IO handling, parallelisation handling, linear solvers and gradient computation, and Fortran 95 for some of the physics implementation. Python is used to manage the simulations. MPI is used on distributed memory machines and OpenMP pragmas have been added to the most costly parts of the code in case of shared memory architecture. The version used in this work relies on external libraries to take advantage of potential GPU acceleration.
The equations are solved iteratively using time-marching algorithms, and most of the time spent during a time step is usually due to the computation of the velocity-pressure coupling, for simple physics. For this reason, the two test cases chosen for the benchmark suite have been designed to assess the velocity-pressure coupling computation, and rely on the same configuration, the 3-D lid-driven cavity, using tetrahedral cell meshes. The first case mesh contains over 13 million cells. The second test case is modular in the sense that mesh multiplication can be used to on-the-fly increase the mesh size.
## Building Code_Satune v7.0.0
The version 7.0.0 of Code_Saturne is to be found [here](https://www.code-saturne.org/cms/sites/default/files/releases/code_saturne-7.0.0.tar.gz).
## Running Code_Satune v7.0.0
## The test cases are to be found under:
https://repository.prace-ri.eu/ueabs/Code_Saturne/2.1/CS_5.3_PRACE_UEABS_CAVITY_111M.tar.gz
https://repository.prace-ri.eu/ueabs/Code_Saturne/2.1/CS_5.3_PRACE_UEABS_CAVITY_13M.tar.gz
## The distribution is to be found under:
https://repository.prace-ri.eu/ueabs/Code_Saturne/2.1/CS_5.3_PRACE_UEABS.tar.gz