GRChombo is an open-source code for numerical relativity simulations. It is developed and maintained by a collaboration of numerical relativists with a wide range of research interests, from early universe cosmology to astrophysics and mathematical general relativity, and has been used in many papers since its first release in 2015.
GRChombo is written entirely in C++14, using hybrid MPI/OpenMP parallelism and vector intrinsics to achieve good performance on the latest architectures. Furthermore, it makes use of the Chombo library for adaptive mesh refinement to allow automatic increasing and decreasing of the grid resolution in regions of arbitrary shape and topology.
Please visit www.grchombo.org for the full list of developers and their institutions, a list of publications using GRChombo, and some videos.
Detailed installation instructions and usage examples are available in our wiki, with the home page giving guidance on where to start.
We welcome feedback, bug reports, and contributions. Please consult the wiki for our coding style and testing policy before filing a pull request.
GRChombo is licensed under the BSD 3-Clause License. Please see LICENSE for details.
If you use GRChombo as part of a paper, please cite our JOSS publication which you can do using the following BibTeX entry:
@article{Andrade2021,
doi = {10.21105/joss.03703},
url = {https://doi.org/10.21105/joss.03703},
year = {2021},
publisher = {The Open Journal},
volume = {6},
number = {68},
pages = {3703},
author = {Tomas Andrade and Llibert Areste Salo and Josu C. Aurrekoetxea and Jamie Bamber and Katy Clough and Robin Croft and Eloy de Jong and Amelia Drew and Alejandro Duran and Pedro G. Ferreira and Pau Figueras and Hal Finkel and Tiago Fran\c{c}a and Bo-Xuan Ge and Chenxia Gu and Thomas Helfer and Juha Jäykkä and Cristian Joana and Markus Kunesch and Kacper Kornet and Eugene A. Lim and Francesco Muia and Zainab Nazari and Miren Radia and Justin Ripley and Paul Shellard and Ulrich Sperhake and Dina Traykova and Saran Tunyasuvunakool and Zipeng Wang and James Y. Widdicombe and Kaze Wong},
title = {GRChombo: An adaptable numerical relativity code for fundamental physics},
journal = {Journal of Open Source Software}
}