Hydrodynamics of Accretion Columns

Hydrodynamics of Ionic Liquids in Bubble Columns

Hydrodynamics of Accretion onto Black Holes

Spherical and axisymmetric accretion onto black holes is discussed. Physical processes in various families of solutions are explained and their characteristics are summarized. Recently discovered solutions of axisymmetric flow provide us with various radiation efficiency and spectrum, which may successfully model diverse accretion systems. Possible role of preheating is also speculated. The var...

Spectral Formation in X-ray Pulsar Accretion Columns

We present the first self-consistent model for the dynamics and the radiative transfer occurring in bright X-ray pulsar accretion columns, with a special focus on the role of the shock in energizing the emerging X-rays. The pressure inside the accretion column of a luminous X-ray pulsar is dominated by the photons, and consequently the equations describing the coupled radiative-dynamical struct...

Shock formation in accretion columns – a 2D radiative MHD approach

We investigate the effects of radiation and magnetic fields on the formation, structure, and stability of the axisymmetric shock and settling flow produced by accreting gas initially directed towards a non rotating stellar surface from a polar column with free-fall speed. We perform one dimensional reference calculations as well as two dimensional calculations with zero, weak and strong magneti...

Validation of Models for Mass Transfer and Hydrodynamics in Packed Columns