Thank you for considering contributing to FluidDyn. FluidDyn is a community-driven project. It's people like you that make FluidDyn useful and successful. There are many ways to contribute, from writing tutorials or examples, improvements to the documentation, submitting bug reports and feature requests, or even writing code which can be incorporated into FluidDyn for everyone to use. (paragraph shamelessly taken and adapted from the MetPy project!)
When opening an issue to report a problem
(https://foss.heptapod.net/fluiddyn/fluidfft/issues), please try to provide a
minimal code example that reproduces the issue along with details of the system
you are using. You can copy-paste the output of the command fluidinfo -v
(Github gists are good for that!).
For FluidDyn, we use the revision control software Mercurial and our main repositories are hosted here: https://foss.heptapod.net/fluiddyn.
Please read our documentation on developer essentials, and especially on setting up Mercurial.