GADGET - 2
A code for cosmological simulations of structure formation..
GADGET is a freely available code for cosmological N-body/SPH simulations on massively parallel computers with distributed memory.
GADGET uses an explicit communication model that is implemented with the standardized MPI communication interface..
The principal structure of GADGET-2 is that of a TreeSPH code (Hernquist & Katz 1989), where gravitational interactions are com- puted with a hierarchical multipole expansion, and gas dynamics is followed with smoothed particle hydrodynamics (SPH)..
GADGET is free software for cosmological N-body/SPH simulations written by Volker Springel at the Max Planck Institute for Astrophysics.
The name is an acronym of "GAlaxies with Dark matter and Gas intEracT".
It is released under the GNU GPL.
It can be used to study for example galaxy formation and dark matter..
We hope that this will be a useful code base for numerical cosmology, especially for the high accuracy simulations needed for future large-scale structure work, but also for calculations with very high dynamic range, because the code has been improved significantly in scalability, and in its ability to carry out very large problem sizes.
The computational algorithms realized in the code are described indetail in the paper: Springel V., Pakmor R., Zier O., Reinecke M., "Simulating cosmic structure formation with the GADGET-4 code", MNRAS, submitted We kindly request to cite this paper in scientific applications using thecode.
These pages represent the code manual and provide a technicaldescription of the code's usage that is not contained in the codepaper, including information about compilation, code configuration,code usage, and output formats.
This documentation is also availableas a PDF filefor off-line reading.
A cross-linked documentation of the source codeis avai.
We describe the newly written code GADGET which is suitable both for cosmological simulations of structure formation and for the simulation of interacting galaxies.
GADGET evolves self-gravitating collisionless fluids with the traditional N-body approach, and a collisional gas by smoothed particle hydrodynamics.
The code can be obtained through a public git-repository, hosted by agitlab server at the Max-Planck Computing and Data Facility(MPCDF).
The repository's page is http://gitlab.mpcdf.mpg.de/vrs/gadget4 To get a cloned repository of the code, you can issue the command: git clone http://gitlab.mpcdf.mpg.de/vrs/gadget4 Note that the gitlab repository s.
Website of the GADGET-2 code: http://www.mpa-garching.mpg.de/gadget
So far, GADGET has been successfully used to run simulations with up to 7.5e7 particles, including:
Compared to previous versions of gadget, the following features are arguably most noteworthy.
The code now offers a Fast Multipole Method as an alternative to a plain tree code, and both algorithms can optionally be run with higher order multipole moments, or as TreePM or FFM-PM hybrid methods.
1993 video game
