Hostname: page-component-7dd5485656-bt4hw Total loading time: 0 Render date: 2025-10-31T03:05:28.002Z Has data issue: false hasContentIssue false
  • English
  • Français

Vorticity expulsion by turbulence: astrophysical implications of an Alka-Seltzer experiment

Published online by Cambridge University Press:  28 March 2006

D. O. Gough  and
D. Lynden-Bell
D. O. Gough
Affiliation:
Department of Astronomy, Columbia University, New York
D. Lynden-Bell
Affiliation:
Royal Greenwich Observatory, Herstmonceux Castle, Hailsham, Sussex
Get access Rights & Permissions [Opens in a new window]

Abstract

Arguments are given which suggest that the mean flow of a turbulent fluid is irrotational far from the boundaries. Mathematical difficulties precluded a detailed theory so a simple experiment was performed. This experiment qualitatively confirmed the suggestion. Other well-known experiments on the mean flow of turbulent fluid may also be interpreted in terms of vorticity expulsion, an idea closely related to Scorer's hypothesis on turbulent mixing.

Theoretical papers on stellar rotation usually assume that convective regions rotate uniformly because of a high turbulent viscosity. However, if vorticity expulsion occurs, convective stellar cores will not rotate. The concept of a turbulent viscosity is criticized.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 32 , Issue 3 , 24 May 1968 , pp. 437 - 447
Copyright
© 1968 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

Batchelor, G. K. 1950 Proc. Roy. Soc. A, 201, 405.
Biermann, L. 1951 Zs. f. Ap. 28, 304.
Bretherton, F. P. & Turner, J. S. 1968 J. Fluid Mech. 32, 449.
Fultz, D., Long, R. L., Owens, G. V., Bohan, W., Kaylob, R. & Well, J. 1959 Met. Mon. 4, no. 21, 26.
Hayashi, C. 1961 Pub. Astr. Soc. Japan, 13, 450.
Howard, L. N. & Gupta, A. S. 1962 J. Fluid Mech. 14, 463.
Lindblad, B. 1959 Hand. Phys. 53, 31.
Parker, R. L. 1966 Proc. Roy. Soc. A, 291, 60.
Bayleigh, LORD 1880 Proc. Lond. Math. Soc. 14, 170 (Sci. Papers 2, 200).
Rayleigh, LORD 1916 Proc. Roy. Soc. A 93, 148 (Sci. Papers 6, 447).
Scorer, R. S. 1965 Unpublished Report (Imperial College).
Scorer, R. S. 1966 Sci. J. 2, 46.
Taylor, G. I. 1935 Proc. Roy. Soc. A 151, 494 (Sci. Papers 2, 336).
Weiss, N. O. 1966 Proc. Roy. Soc. A, 293, 310.