Instability of Astrophysical Jets. I ---Numerical Simulation of Axisymmetric Opposing Jets---

Details Instability of Astrophysical Jets. I ---Numerical Simulation of Axisymmetric Opposing Jets--- Instability of Astrophysical Jets. I ---Numerical Simulation of Axisymmetric Opposing Jets---

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pthph..84..837m&link_type=abstract

Progress of Theoretical Physics, Vol. 84, No. 5, pp. 837-855

Physics

2

Scientific paper

Gas dynamical aspects of astrophysical jets as well as laboratory jets are considered using a time-dependent two-dimensional Eulerian code. First, axisymmetric underexpanded jets are computed to test our computer code. Second, axisymmetric supersonic matched jets are computed using two different types of boundary conditions. It is found that our ambient gas condition applied on the outer boundary does not give an artificial reflection of shock waves and it is superior to other boundary conditions. Third, the instability of the working surface observed in the above simulations in investigated by computing an opposing jet or a forward-facing jet, and the results are compared with experiments. A mechanism of the instability is discussed.

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