Structure formation, wave propagation, instabilities and energy exchange in accretion flows in close binaries

In this paper we discuss the physical origins and mechanisms, which provide angular momentum transport in and X-ray radiation from accretion flows in close binary star systems. In this case the gas flow moves through the gravitational and magnetic field of both stars and interacts with the luminosity. The conditions are very different from point to point and it gives possibility different structures such as spirals, vortices and other to form. At the same time, in the flow arise conditions for instability burning. Structures and instabilities in the flow are the most effective mechanism for angular momentum transport, and this way provides the luminosity from central star surface. (authors) Keywords: hydrodynamics, accretion flow, instabilities