Three-dimensional Hydrodynamical Simulation of Bondi-Hoyle Accretion

Details Three-dimensional Hydrodynamical Simulation of Bondi-Hoyle Accretion Three-dimensional Hydrodynamical Simulation of Bondi-Hoyle Accretion

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.8406r&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #84.06; Bulletin of the American Astronomical Society, Vol. 24, p.1258

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Scientific paper

We numerically investigate the accretion flow of initially uniform matter past a compact object. At large distances upstream the medium has spacially constant values for density (rho_ infty ), sound speed (c_infty ) and velocity (v_infty =3c_infty , relative to the compact object). The accreting object is modeled to have a totally absorbing surface with a radius of 0.1 Hoyle-Lyttleton accretion radii (r_a). Using six multiply nested and refined, equidistant and Cartesian, grids enables us to resolve the accreting object on the finest grid while at the same time spanning a volume of (16r_a)(3) on the coarsest grid. The hydrodynamics of the ideal gas (ratio of specific heats gamma =5/3) is modeled by the 'Piecewise Parabolic Method' (PPM).

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