Three-dimensional structure and dynamics of a supersonic jet

Details Three-dimensional structure and dynamics of a supersonic jet Three-dimensional structure and dynamics of a supersonic jet

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...305l..57a&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 305, June 15, 1986, p. L57-L60.

Astronomy and Astrophysics

Astronomy

15

Gas Dynamics, Radio Jets (Astronomy), Supersonic Jet Flow, Three Dimensional Flow, Two Dimensional Flow, Computer Programs, Degrees Of Freedom, Entropy, Three Dimensional Models

Scientific paper

Using a different numerical technique, the present study reproduces in two dimensions and three dimensions the 1982 results of Norman and colleagues for an axisymmetric supersonic jet. While the three-dimensional models show the same overall structure (collimated beam, beam cap, strong backflow sustaining a cocoon around the beam), some additional features are also seen that are three-dimensional in nature. The cocoon has a rich structure of dynamical cells that have vortical motion perpendicular to the jet's beam axis. These cells may be important for the overall stability and collimation of the jet on the whole. Pinching modes on the cocoon are observed; however, for the present choice of parameters, no 'garden hose' fluting of the jet is observed.

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