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# ![FluidSim](https://foss.heptapod.net/fluiddyn/fluidsim/raw/branch/default/doc/logo.svg)

[![Latest version](https://badge.fury.io/py/fluidsim.svg)](https://pypi.python.org/pypi/fluidsim/)
![Supported Python versions](https://img.shields.io/pypi/pyversions/fluidsim.svg)
[![Documentation status](https://readthedocs.org/projects/fluidsim/badge/?version=latest)](http://fluidsim.readthedocs.org)
[![Chat room](https://img.shields.io/matrix/fluiddyn-users:matrix.org.svg)](https://matrix.to/#/#fluiddyn-users:matrix.org)
[![Code coverage](https://codecov.io/gh/fluiddyn/fluidsim/branch/branch%2Fdefault/graph/badge.svg)](https://codecov.io/gh/fluiddyn/fluidsim)
[![Heptapod CI](https://foss.heptapod.net/fluiddyn/fluidsim/badges/branch/default/pipeline.svg)](https://foss.heptapod.net/fluiddyn/fluidsim/-/pipelines)
[![Github Actions](https://github.com/fluiddyn/fluidsim/actions/workflows/ci.yml/badge.svg?branch=branch/default)](https://github.com/fluiddyn/fluidsim/actions)

Fluidsim is an extensible framework for studying fluid dynamics with
numerical simulations using Python. Fluidsim is an object-oriented
library to develop solvers (mainly using pseudo-spectral methods) by
writing mainly Python code. The result is **very efficient** even
compared to a pure Fortran or C++ code since the time-consuming tasks
are performed by optimized compiled functions.

**Documentation**: <https://fluidsim.readthedocs.io>

## Getting started

To try fluidsim without installation:
[![Binder notebook](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/fluiddyn/fluidsim/branch%2Fdefault?urlpath=lab/tree/doc/ipynb)

For a **basic installation** it should be sufficient to run:

pip install fluidsim

or with conda:

conda install -c conda-forge fluidsim

Much more detailed instructions are given in [the
documentation](https://fluidsim.readthedocs.io/en/latest/install.html).

## How does it work?

Fluidsim is a
[HPC](https://en.wikipedia.org/wiki/High-performance_computing) code. It
is part of the wider project
[FluidDyn](https://pypi.python.org/pypi/fluiddyn/) and its
pseudospectral solvers rely on the library
[fluidfft](http://fluidfft.readthedocs.io) to use very efficient FFT
libraries. Fluidfft is written in C++, Cython and Python. Fluidfft and
fluidsim take advantage of
[Pythran](https://github.com/serge-sans-paille/pythran), an
ahead-of-time compiler which produces very efficient binaries by
compiling Python via C++11.

An advantage of a CFD code written mostly in Python is that, to run
simulations and analyze the results, the users communicate (possibly
interactively) together and with the machine with Python, which is
nowadays among the best languages to do these tasks. Moreover, it is
much simpler and faster than with pure Fortran or C++ codes to add any
complicated analysis or to write a modified solver. Fluidsim can also be
used to extend existing solvers with Python interfaces such as
[Basilisk](http://basilisk.fr).

We have created fluidsim to be **easy and nice to use and to develop**,
**efficient** and **robust**.

*Keywords and ambitions*: fluid dynamics research with Python (>=3.6);
modular, object-oriented, collaborative, tested and documented, free and
open-source software.

## License

FluidSim is distributed under the
[CeCILL](http://www.cecill.info/index.en.html) License, a GPL compatible
french license.

## Metapapers and citations

If you use FluidSim to produce scientific articles, please cite our
metapapers presenting the [FluidDyn
project](https://openresearchsoftware.metajnl.com/articles/10.5334/jors.237/),
[FluidFFT](https://openresearchsoftware.metajnl.com/articles/10.5334/jors.238/),
and
[FluidSim](https://openresearchsoftware.metajnl.com/articles/10.5334/jors.239/):

@article{fluiddyn, doi = {10.5334/jors.237}, year = {2019}, publisher
= {Ubiquity Press, Ltd.}, volume = {7}, author = {Pierre Augier and
Ashwin Vishnu Mohanan and Cyrille Bonamy}, title = {{FluidDyn}: A
Python Open-Source Framework for Research and Teaching in Fluid
Dynamics by Simulations, Experiments and Data Processing}, journal =
{Journal of Open Research Software} }

@article{fluidfft, doi = {10.5334/jors.238}, year = {2019}, publisher
= {Ubiquity Press, Ltd.}, volume = {7}, author = {Ashwin Vishnu
Mohanan and Cyrille Bonamy and Pierre Augier}, title = {{FluidFFT}:
Common {API} (C\$mathplusmathplus\$ and Python) for Fast Fourier
Transform {HPC} Libraries}, journal = {Journal of Open Research
Software} }

@article{fluidsim, doi = {10.5334/jors.239}, year = {2019}, publisher
= {Ubiquity Press, Ltd.}, volume = {7}, author = {Mohanan, Ashwin
Vishnu and Bonamy, Cyrille and Linares, Miguel Calpe and Augier,
Pierre}, title = {{FluidSim}: {Modular}, {Object}-{Oriented} {Python}
{Package} for {High}-{Performance} {CFD} {Simulations}}, journal =
{Journal of Open Research Software} }
147 changes: 0 additions & 147 deletions README.rst

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3 changes: 3 additions & 0 deletions pyproject.toml
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omit = [
"*/try_*.py",
"*/_old_*.py",
"**/__pythran__/*.py",
"**/__python__/*.py",
"**/__numba__/*.py",
]
[tool.coverage.report]
show_missing = true
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