Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.158..281r&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 158, no. 2, Aug. 1989, p. 281-295.
Astronomy and Astrophysics
Astrophysics
7
Jet Flow, Magnetic Fields, Magnetohydrodynamic Stability, Magnetohydrodynamic Waves, Vacuum Effects, Incompressible Fluids, Perturbation Theory, Stress Tensors
Scientific paper
The magnetohydrodynamic stability of a streaming liquid cylinder subject to surface tension and pervaded by a magnetic vacuum field has been elaborated for all axisymmetric and non-axisymetric disturbances. The dispersion relation is obtained and studied analytically and numerically. The streaming has always a destabilizing effect. The axial magnetic fields inside and outside the jet have always stabilizing effects for all perturbations. The transverse magnetic field has a destabilzing effect. However, if the axial field intensity is so high and paramount over that of the transverse field, the destabilizing character of the model is suppressed. The latter is satisfied if the Alfven wave velocity is greater than the equilibrium liquid velocity.
Elazab Samia S.
Radwan Ahmed E.
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