2007/09/12 by Georgi Pavlovski, Pavlovski, Georgi, Christian Kaiser +5
Earth and Planetary Sciences · Physics and Astronomy · #Oceanographic and Atmospheric Processes #Solar and Space Plasma Dynamics #Tropical and Extratropical Cyclones Research #astro-ph
paper · pdf · doi:10.48550/arxiv.0709.1796
sumbitted to MNRAS. High resolution pdf available http://www.astro.soton.ac.uk/~gbp/files/dynamics.pdf
arxiv created 2007/09/12 · arxiv updated 2009/12/01
We present a phenomenological model of the dynamics of buoyant bubbles in the atmosphere of a cluster of galaxies. The derived equations describe velocity, size, mass, temperature and density of the buoyant bubbles as functions of time based on several simple approximations. The constructed model is then used to interpret results of a numerical experiment of heating of the cluster core with buoyant bubbles in a hydrodynamical approximation (i.e. in the absence of magnetic fields, viscosity, and thermal diffusion). Based on the model parameters we discuss possible limitations of the numerical treatment of the problem, and highlight the main physical processes that govern the dynamics of bubbles in the intracluster medium.