FEN = Fortran Environment for Numerics. It is a Fortran environment for performing numerical simulations. It is developed for teaching and research activites but with a focus on HPC performances.

• Finite difference solver for the incompressible Navier-Stokes equations
• Fast Direct Solver for the solution of the Poisson equation
• Volume of Fluid solver (MTHINC) for multiphase simulations
• Direct forcing Immersed Boundary Method for simulation of flow around solid objects.
• Computaional parallelism by MPI

Please kindly cite this publication if the solver helps for yout research

@article{de2021fully,
  title={A fully Eulerian solver for the simulation of multiphase flows with solid bodies: Application to surface gravity waves},
  author={De Vita, Francesco and De Lillo, Filippo and Verzicco, Roberto and Onorato, Miguel},
  journal={Journal of computational physics},
  volume={438},
  pages={110355},
  year={2021},
  publisher={Elsevier}
}

FEN uses the 2decomp&FFT library for the domain decomposition and FFTW3 library for the solution of the Poisson equation.

Add to your $HOME/.bashrc the following lines

export FEN_DIR=...
export FFTW3_DIR=...
export _2DECOMP_DIR=...

and replace ... with proper values for you system. Then type

source $HOME/.bashrc
cd $FEN_DIR
sh INSTALL.sh

After this step the requested libraries should be properly installed.

Possible missing packages: libblas-dev, liblapack-dev, gfortran, libopenmpi-dev

FEN is the combinations of several methods / technique that I have learned during past years. The main sources of inspiration are the two open source solvers Gerris and Basilisk and the code used at KTH during my PostDoc, for which many contributions have been given by Pedro Simeon Costa and Marco Edoardo Rosti.