On mass transport in nonviscous, non-self-gravitating fluid disks

Details On mass transport in nonviscous, non-self-gravitating fluid disks On mass transport in nonviscous, non-self-gravitating fluid disks

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...362..395l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 362, Oct. 20, 1990, p. 395-405.

Astronomy and Astrophysics

Astrophysics

13

Barotropic Flow, Galactic Rotation, Hydrodynamics, Mass Flow, Angular Momentum, Corotation, Spiral Galaxies, Vorticity

Scientific paper

The present analysis of a mild nonaxisymmetric perturbing potential-induced mass flow in a barotropic, nonviscous, nonself-gravitating two-dimensional fluid disk, proceeds by taking advantage of the existence of two small parameters: the relative disk thickness and the relative potential perturbation strength. It is shown that mass flow contains both a resonant and a nonresonant contribution. Landau damping at corotation creates a torque in the fluid, in response to which pressure forces cause angular momentum to be advected. For parameters representative of tightly wrapped spiral galaxies, the resonant mass flux is approximately comparable to the mass flux due to viscous stresses and shocks.

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