Overview

code_saturne is the free, open-source multi-purpose software developed primarily by EDF for computational fluid dynamics (CFD) applications. It mainly solves the Navier-Stokes equations with scalar transport for 2D, 2D-axisymmetric, and 3D flows, whether steady or unsteady, laminar or turbulent, incompressible or weakly compressible, isothermal or not, using the Finite Volume Method (FVM) approach. A new discretisation based on the Compatible Discrete Operator (CDO) approach can be used for some other physics. A highly parallel coupling library (Parallel Locator Exchange - PLE) is also available in the distribution to couple other software with different physics, such as for conjugate heat transfer and structural mechanics. For the incompressible solver, the pressure is solved using an integrated Algebraic Multi-Grid algorithm and the velocity components/scalars are computed by conjugate gradient methods or Gauss-Seidel/Jacobi/Krylov solvers.

Website: https://www.code-saturne.org/cms/web/

Building version 8.3.0

The version 8.3.0 of Code_Saturne is to be found here. It must be downloaded before running the installer.

A simple installer is made available for this version of the code and for HPC machines.

This version assumes that the following modules are loaded:

module load intel/2024.0 compiler hpcx/2.19
module load python/3.10
export OMPI_CC=icc
export OMPI_CXX=icpc
export OMPI_FC=ifort

The end of the InstallHPC.sh script reads:

$KERSRC/configure    \
--enable-openmp        \
--disable-shared           \
--disable-gui                  \
--prefix=$KEROPT      \
CC=mpicc FC=ifx CXX=mpicxx CFLAGS="-O3" FCFLAGS="-O3"

make -j 12
make install

$KEROPT/bin/code_saturne

cd $INSTALLPATH

To build:

wget https://www.code-saturne.org/cms/sites/default/files/releases/code_saturne-8.3.0.tar.gz
tar xfp code_saturne-8.3.0.tar.gz
./InstallHPC.sh

If the installation is successful, it should create code_saturne-8.3.0/arch/Linux/bin/code_saturne

./code_saturne-8.3.0/arch/Linux/bin/code_saturne
Usage: ./code_saturne-8.3.0/arch/Linux/bin/code_saturne <topic>

Topics:
  help
  studymanager
  smgr
  bdiff
  bdump
  compile
  config
  cplgui
  create
  gui
  parametric
  studymanagergui
  smgrgui
  trackcvg
  update
  up
  info
  run
  submit
  symbol2line

Options:
  -h, --help  show this help message and exit

Tasks and Submissions

1. Run the application on 4 CPU nodes and submit the results. Experiment with MPI and OpenMP to find the best results.

2. Run MPI Profiler to profile the application, which 3 MPI calls are mostly used? present your work in the teams interview ppt slides

3. Visualize the results, create a short video that demonstrate the given input via paraview or any other tool.

4. Bonus: Experiment with GPU runs over 4 GPUs, single node. Show your work on the team’s presentation.