Accretion in numerical simulations of two-dimensional flows

Details Accretion in numerical simulations of two-dimensional flows Accretion in numerical simulations of two-dimensional flows

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...193..131s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 193, no. 1-2, March 1988, p. 131-140. CNRS-supported research.

Astronomy and Astrophysics

Astrophysics

1

Magnetohydrodynamic Flow, Stellar Mass Accretion, Supersonic Flow, Two Dimensional Flow, Angular Momentum, Astronomical Maps, Flow Stability, Perturbation Theory, Reynolds Number

Scientific paper

High energy phenomena in astrophysics are thought to be powered by highly efficient central engines made of a compact object accreting mass from its surroundings. The trapped gas generally possesses angular momentum which must be transferred to the outer parts of the disc in order to fall inwards and liberate gravitational binding energy. The authors consider plane supersonic accretion flow in a Newtonian potential and develop the numerical treatment in order to study its behaviour and stability against perturbations. Computations show that shear instability alone is not sufficient to destabilize a quasi Keplerian supersonic accreting flow for local Reynolds numbers of the order of 50.

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