Numerical simulations of two-dimensional and three-dimensional accretion flows

Takuya Matsuda, Takanori Ishii, Nobuhiro Sekino, Keisuke Sawada, Eiji Shima, Mario Livio, Ulrich Anzer

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Numerical simulations of 2D and 3D accretion flows past a gravitating compact object from a uniform flow at a large distance upstream are performed by solving the Eulerian equations. We find that 2D flows exhibit a 'flip-flop instability' if the central accreting body is small. If the central body is enlarged at some instance in the oscillating flow, then the accretion shock shows a rather periodic oscillation similar to the von Karman vortex street. In the case of 3D flows, it is found that the shock cone is much more robust than in 2D, and the flip-flop instability takes a different, probably less violent form. The causes for the instabilities are discussed.

Original languageEnglish
Pages (from-to)183-191
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Publication statusPublished - 1992

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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