Statistics – Computation
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247..434k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 2, July 1991, p. 434-446. Research supported by Cusanuswerk Foundatio
Statistics
Computation
12
Binary Stars, Computational Astrophysics, Gas Flow, Radiation Pressure, Stellar Winds, Wolf-Rayet Stars, Analytic Functions, Gas Dynamics, Hydrodynamic Equations, Shock Fronts, Supersonic Flow
Scientific paper
An extension of Godunov's shock-capturing method is employed to numerically investigate the geometry and dynamics of two quasiradial supersonic counter-streaming gas flows. Fully time-dependent hydrodynamical equations are established and integrated into the Godunov scheme to advance an initial solution through a sequence of time-steps on a grid. A free-flow pattern and the flow in the field of a (repulsive) two-fixed center problem are employed to model the simplified radiation field of a model binary. A subsonic region is isolated in the model which has six solar radii at the collision point. The shock fronts and the contact discontinuity can be observed in the visualized flow pattern. The emission of X-ray brehmsstrahlung considered in the subsonic region based on the physical parameters of the subsonic region is found to be in basic agreement with observational results from the Einstein laboratory.
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