Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250..760w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, June 15, 1991, p. 760-768.
Astronomy and Astrophysics
Astronomy
4
Cylindrical Plasmas, Kelvin-Helmholtz Instability, Magnetohydrodynamic Flow, Shear Layers, Comet Tails, Flow Stability, Solar Wind
Scientific paper
A linear model analysis of the cylindrical shear flow leads to an eigenvalue problem based on a differential equation. A detailed analysis of the solution is presented. From this the following physical principles are extracted. (1) Unstable modes only exist within a hemicycle in complex phase space. (2) Each mode has an associated 'comoving point', i.e., there is always some fluid that comoves with the pattern. At the comoving point, neutral modes are oscillating or wave-like and unstable modes are overreflected. (3) Short wavelengths with large azimuthal numbers or long-wavelength pinch modes can be stabilized by the presence of a shear layer both for ordinary modes and reflecting modes. (4) Reflecting modes have a band structure in wave-number versus growth rate space. For light jets, the growth rates are very small. (5) A shear layer suppresses pinching modes more effectively.
Wang De-yu
Wu Ding
No associations
LandOfFree
The Kelvin-Helmholtz instability of a cylindrical flow with a shear layer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Kelvin-Helmholtz instability of a cylindrical flow with a shear layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Kelvin-Helmholtz instability of a cylindrical flow with a shear layer will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1285504