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Vol. 72, n° 1. The instability of precessing flow / R. R. Kerswell
in Geophysical and astrophysical fluid dynamics
Titre : The instability of precessing flow Type de document : articles et extraits Auteurs : R. R. Kerswell, Auteur Année de publication : 1993 Importance : pp. 107 - 144 Langues : Français (fre) Mots-clés : Precession Earth's core inertial waves rotating fluids Résumé : An explanation is put forward for the instability observed within a precessing, rotating spheroidal container. The constant vorticity solution for the flow suggested by Poincaré is found to be inertially unstable through the parametric coupling of two inertial waves by the underlying constant strain field. Such resonant couplings are due either to the elliptical or shearing strains present which elliptically distort the circular streamlines and shear their centres respectively. For the precessing Earth's outer core, the shearing of the streamlines and the ensuing shearing instability are the dominant features. The instability of some exact, linear solutions for finite precessional rates is established and used to corroborate the asymptotic analysis. A complementary unbounded analysis of a precessing, rotating fluid is also presented and used to deduce a likely upperbound on the growth rate of a small disturbance. Connection is made with past experimental studies.
in Geophysical and astrophysical fluid dynamics
The instability of precessing flow [articles et extraits] / R. R. Kerswell, Auteur . - 1993 . - pp. 107 - 144.
Langues : Français (fre)
Mots-clés : Precession Earth's core inertial waves rotating fluids Résumé : An explanation is put forward for the instability observed within a precessing, rotating spheroidal container. The constant vorticity solution for the flow suggested by Poincaré is found to be inertially unstable through the parametric coupling of two inertial waves by the underlying constant strain field. Such resonant couplings are due either to the elliptical or shearing strains present which elliptically distort the circular streamlines and shear their centres respectively. For the precessing Earth's outer core, the shearing of the streamlines and the ensuing shearing instability are the dominant features. The instability of some exact, linear solutions for finite precessional rates is established and used to corroborate the asymptotic analysis. A complementary unbounded analysis of a precessing, rotating fluid is also presented and used to deduce a likely upperbound on the growth rate of a small disturbance. Connection is made with past experimental studies. Réservation
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Code-barres Cote Support Localisation Section Disponibilité ART-1993107 KER Document imprimé Bureau chercheur Bureau de MEUNIER Patrice Disponible A manual of spherical and practical astronomy : embracing the general problems of spherical astronomy, the special applications to nautical astronomy, and the theory and use of fixed and portable astronomical instruments with an appendix on the method of / W. Chauvenet
Titre : A manual of spherical and practical astronomy : embracing the general problems of spherical astronomy, the special applications to nautical astronomy, and the theory and use of fixed and portable astronomical instruments with an appendix on the method of Type de document : document imprimé Auteurs : W. Chauvenet, Auteur Mention d'édition : 5th ed. rev. and corr. Editeur : New York : Dover Publications Année de publication : 1960 Importance : 708 p. ; 22 cm Note générale : Paperback
Langues : Français (fre) Mots-clés : ABERRATION ASTRONOMICAL OBSERVATIONS CELESTIAL SPHERE ECLIPSES FINDING LATITUDE FINDING LONGITUDE INTERPOLATION NUTATION PARALLAX PRECESSION Index. décimale : 90 Astronomy, and Astrophysics Résumé : Spherical astronomy Astronomical instruments Least squares
Note de contenu : This new Dover ed. is an unabridged and unaltered republication of the fifth rev. and corr. ed. (1891)
A manual of spherical and practical astronomy : embracing the general problems of spherical astronomy, the special applications to nautical astronomy, and the theory and use of fixed and portable astronomical instruments with an appendix on the method of [document imprimé] / W. Chauvenet, Auteur . - 5th ed. rev. and corr. . - New York : Dover Publications, 1960 . - 708 p. ; 22 cm.
Paperback
Langues : Français (fre)
Mots-clés : ABERRATION ASTRONOMICAL OBSERVATIONS CELESTIAL SPHERE ECLIPSES FINDING LATITUDE FINDING LONGITUDE INTERPOLATION NUTATION PARALLAX PRECESSION Index. décimale : 90 Astronomy, and Astrophysics Résumé : Spherical astronomy Astronomical instruments Least squares
Note de contenu : This new Dover ed. is an unabridged and unaltered republication of the fifth rev. and corr. ed. (1891)
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Code-barres Cote Support Localisation Section Disponibilité W0013 90 CHA Document imprimé IRPHE Bibliothèque de l'IRPHE Disponible