Boundary layer circulation in disk-halo galaxies

Details Boundary layer circulation in disk-halo galaxies Boundary layer circulation in disk-halo galaxies

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222...61w&link_type=abstract

Astrophysical Journal, Part 1, vol. 222, May 15, 1978, p. 61-77.

Astronomy and Astrophysics

Astrophysics

12

Boundary Layer Flow, Galactic Structure, Gas Flow, Interstellar Matter, Baroclinity, Galactic Rotation, Halos, Hydrodynamics, Inviscid Flow, Rotating Disks, Viscosity

Scientific paper

An idealized model of a disk-halo system is described and applied to the study of some fluid dynamical interactions between the gaseous components of a galactic disk and surrounding halo. The azimuthal flow in the vicinity of the disk, the viscosity of the interstellar gas, and a boundary layer structure are characterized. The fluid dynamical equations governing the viscous disk and the inviscid halo regions are solved by means of matched asymptotic expansions. Examples of gas circulation patterns are described; the flows show features that are suggestive of the '3-kpc arm' as well as the 'galactic infall' in the solar neighborhood. The implications of inflection points in the vertical structure of the flow is considered.

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