Welcome
Ramses has been designed to study structure formation in the universe with high spatial resolution. The code is based on Adaptive Mesh Refinement (AMR) technique, with a tree based data structure allowing recursive grid refinements on a cell-by-cell basis. The N-body solver is very similar to the one developed for the ART code (Kravtsov et al. 97), with minor differences in the exact implementation. The hydrodynamical solver is based on a second-order Godunov method, a modern shock-capturing scheme known to compute accurately the thermal history of the fluid component. The accuracy of the code is carefully estimated using various test cases, from pure gas dynamical tests to cosmological ones. The specific refinement strategy used in cosmological simulations is described, and potential spurious effects associated to shock waves propagation in the resulting AMR grid are discussed and found to be negligible.
This website’s goal is to promote the activities of the Ramses community and is edited by the SNO Ramses.
Events
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RAMSES school for new users
The RAMSES SNO is pleased to announce its first RAMSES school. This school will take place in Lyon on 4-5 Nov. 2024 and is designed to provide practical training for new users of the RAMSES code who wish to learn how to design and run simulations for their science projects. The school will provide a…
News
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A Census of the RAMSES Community
The French astrophysics community is putting in place a service to help the international community to use and develop RAMSES in order to produce state-of-the-art simulations of astrophysical objects. This service initially relies on a commitment of 6 institutes in France (in Lyon, Paris, Saclay, Meudon, Strasbourg, and Nice) plus the benevolence of Princeton University,…
Projects
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The Horizon Run 5
Horizon Run 5 (HR5, not to be mistaken with The Horizon Simulations), introduced by Lee et al. (2021) is a cosmological hydrodynamical simulation which captures the properties of the Universe on a Gpc scale while achieving a resolution of 1 kpc, aims to study the effect of large-scale perturbations on formation of galaxies and clusters.…
