Statistics – Computation
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.211..767s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 211, Dec. 15, 1984, p. 767-773. Research supported by t
Statistics
Computation
7
Astronomical Models, Flow Deflection, Jet Flow, Oblique Shock Waves, Radio Galaxies, U Bends, Channel Flow, Computational Astrophysics, Mach Number, Shock Wave Interaction, Steady Flow
Scientific paper
The deflection of a hydrodynamic jet via an oblique internal shock is studied. The pressure increase across the shock and the confinement of the shocked jet are maintained by the ramming of the bend through the ambient medium. A steady flow pattern is found in the reference frame co-moving with the bend: the external ram pressure gradually bends the medeflected jet by up to 180 deg. The shock polar method is used to quantify this model and it is found that changes in the initial angle of deflection and fluid dynamic instabilities will destroy this flow pattern for heavy jets. The model is applied to the U-shaped channels in the radio galaxies 3C 401 and 4C 32.69 and the head-tail source IC 708. Possible causes of the initial deflection are discussed.
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