MATHEMATICAL MODELING AND VISUALIZATION OF MATTER FLOWS IN ACCRETION STELLAR DISKS
In recent years large amount of observational data on stellar accretion disks obtained. Numerical simulations are virtually the only way to a comprehensive study of such astrophysical objects. The calculations produced vast amounts of information, so their visualization is not only a way to look, but also research. The results of the simulation and study by using a visual representation of the structure of gasdynamic flows in these discs with gravity are shown. A new mechanism that defines and characterizes the accretion (fall) of the matter to the central body is proposed. The problem of the emergence and development of large-scale vortex motion in shear flow of the accretion disk is considered in the article. The mechanism of angular momentum transfer by large vortex structures arising from the initial development of small perturbations is investigated. Considered problems involve a huge amount of computational work so they carried out on multiprocessor computer systems. Visualization of the calculations in these problems is the method of research and study of the flows structure. Animation of the calculations allows to trace the evolution of flows. Comparison of flow patterns for different characteristics in the form of contour lines gives a visual representation of the vortex flow structure. Allocation of investigated subdomains and use special palettes as well as narrowing of the considered variation range of the flow characteristics provide an opportunity to study small-scale features of the flow.