首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Hydrodynamical adaptive mesh refinement simulations of turbulent flows – I. Substructure in a wind
Authors:L Iapichino  J Adamek  W Schmidt  J C Niemeyer
Institution:Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
Abstract:The problem of the resolution of turbulent flows in adaptive mesh refinement (AMR) simulations is investigated by means of three-dimensional (3D) hydrodynamical simulations in an idealized setup, representing a moving subcluster during a merger event. AMR simulations performed with the usual refinement criteria based on local gradients of selected variables do not properly resolve the production of turbulence downstream of the cluster. Therefore, we apply novel AMR criteria which are optimised to follow the evolution of a turbulent flow. We demonstrate that these criteria provide a better resolution of the flow past the subcluster, allowing us to follow the onset of the shear instability, the evolution of the turbulent wake and the subsequent back-reaction on the subcluster core morphology. We discuss some implications for the modelling of cluster cold fronts.
Keywords:hydrodynamics  instabilities  turbulence  methods: numerical  galaxies: clusters: general
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号