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3-D Simulations of Kelvin-Helmholtz Instabilities in Supersonic Jets

Published online by Cambridge University Press:  25 May 2016

P. Rossi ,
G. Bodo ,
S. Massaglia ,
A. Ferrari  and
A. Malagoli
P. Rossi
Affiliation:
Osservatorio Astronomico di Torino Strada dell'Osservatorio 20, 10025 Pino Torinese, Italy EFI/LASR, University of Chicago 933 E.56th, Chicago, IL 60637, USA
G. Bodo
Affiliation:
Osservatorio Astronomico di Torino Strada dell'Osservatorio 20, 10025 Pino Torinese, Italy EFI/LASR, University of Chicago 933 E.56th, Chicago, IL 60637, USA
S. Massaglia
Affiliation:
Osservatorio Astronomico di Torino Strada dell'Osservatorio 20, 10025 Pino Torinese, Italy EFI/LASR, University of Chicago 933 E.56th, Chicago, IL 60637, USA
A. Ferrari
Affiliation:
Osservatorio Astronomico di Torino Strada dell'Osservatorio 20, 10025 Pino Torinese, Italy EFI/LASR, University of Chicago 933 E.56th, Chicago, IL 60637, USA
A. Malagoli
Affiliation:
Osservatorio Astronomico di Torino Strada dell'Osservatorio 20, 10025 Pino Torinese, Italy EFI/LASR, University of Chicago 933 E.56th, Chicago, IL 60637, USA

Extract

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One of the key processes governing the structure and evolution of astrophysical jets is their interaction with the surrounding medium. A jet can deposit momentum and energy in the ambient medium, and entrain external material. The main physical process responsible for mixing between a jet flow and the ambient medium is the Kelvin-Helmholtz (KH) instability. We have previously analysed the 2D evolution of the axisymmetric modes of a cylindrical jet (Bodo et al 1994) and of the antisymmetric modes of a planar slab jet (Bodo et al 1995). These last are thought to give indications of the 3D evolution of the helical modes of a cylinder, since the linear behavior is very similar. In this contribution we present some preliminary results of fully 3D simulations comparing them with the mentioned 2D results.

Type
Radio Source Modelling and Emission Mechanisms
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 453 - 454
Copyright
Copyright © Kluwer 1996 

References

Bodo, G., Massaglia, S., Ferrari, A. and Trussoni, E. (1994), A&A , 283, 655.Google Scholar
Bodo, G., Massaglia, S., Rossi, P., Ferrari, A., Rosner, R. and Malagoli, A. (1995), A&A , in press.Google Scholar