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Institute for Computational Science

Simulation codes

Computing and programming are very important activities in our institute. Our students and collaborators have privileged access to world-leading supercomputers, but also to smaller local systems. From the Tier-0 supercomputers available through the PRACE allocation scheme in Europe to your own laptop, a complete hierarchy of machine is required to test, develop and deploy your ideas and change the world. Whether you need to simulate a complex dynamical system or to analyse a large set of medical data, you will need a computer and an application to perform your task. It is however important to identify the optimal tool for this, and to get the proper training to use this tool


The Institute for Computational Science is developing and maintaining various software. These can be downloaded freely and documentation is available on the corresponding code sites.



PKDGRAV is the world fastest N body code. It uses the fast multipole method, and exploits the MPI library, together with multi-threading and GPGPU acceleration.


SKID and Grasshopper

SKID and Grasshopper are particle-based tools to identifiy density peaks in any N body data sets. It is used to detect bound structures and sub-structures in cosmological simulations.



GENGA is a GPU based, collisional N body code, used to study planitesimals dynamics in the solar system.


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Getting an account

Contact your supervisor who will then:

  - add an account at CSCS using their portal, or,

  - add you to their ScienceCloud instance(s), or,

  - contact S3IT to add you.


Storing your data: since it varies among the groups, please ask your supervisor.


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