Turbulence Modelling and Stirring Mechanisms in the Cosmological Large-scale Structure

Details Turbulence Modelling and Stirring Mechanisms in the Cosmological Large-scale Structure Turbulence Modelling and Stirring Mechanisms in the Cosmological Large-scale Structure

2011-09-09

arxiv.org/abs/1109.2042v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 1 figure, proceedings of "Advances in Computational Astrophysics: methods, tools and outcomes", Cefal\`u (Italy), Jun

Scientific paper

FEARLESS (Fluid mEchanics with Adaptively Refined Large Eddy SimulationS) is a numerical scheme for modelling subgrid-scale turbulence in cosmological adaptive mesh refinement simulations. In this contribution, the main features of this tool will be outlined. We discuss the application of this method to cosmological simulations of the large-scale structure. The simulations show that the production of turbulence has a different redshift dependence in the intra-cluster medium and the warm-hot intergalactic medium, caused by the distinct stirring mechanisms (mergers and shock interactions) acting in them. Some properties of the non-thermal pressure support in the two baryon phases are also described.

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