Gas dynamic investigation of rotating gas accretion

Details Gas dynamic investigation of rotating gas accretion Gas dynamic investigation of rotating gas accretion

1998-09-26

arxiv.org/abs/astro-ph/9809337v2

Astronomical and Astrophysical Transactions, 1997, vol. 12, pp. 263-280

Astronomy and Astrophysics

Astrophysics

17 pages, 18 figures in GIF bitmap format

Scientific paper

10.1080/10556799708232082

We study axisymmetric accretion of slowly rotating matter onto a gravitation center. The process of the flow restructuring is presented as the angular velocity of accreting gas approaches the Keplerian velocity. For spherically-symmetric accretion we found conditions of existence of steady-state supersonic solutions for various external boundary conditions. These conditions are used for choosing proper initial and boundary conditions for accretion of the rotating matter. The study is performed on the basis of the numerical solution of the Euler gas dynamic equations using the second order extension of the Lax-Friedrichs scheme with the implicit approximation of the source term.

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