Record details

    Convection in rotating non-uniformly stratified spherical fluid shells in dependence on Ekman and Prandtl numbers
    Hejda, Pavel
    Saxonbergová-Jankovičová, Dana
    Šimkanin, Ján
Publication type
    článek v odborném periodiku
Source title - serial
    Physics of the Earth and Planetary Interiors
    Roč. 178, č. 3-4
    s. 39-47
    Projekt: IAA300120704, GA AV ČR3cav_un_auth*0228938
    Rozsah: 9 s.
    Výzkumný záměr: CEZ:AV0Z30120515
    Výzkumný záměr: CEZ:AV0Z30420517
Subject category
    non-uniform stratification
    penetrative convection
    rotating convection
    small-scale structures
Abstract (in english)
   We present an investigation of rotating convection in non-uniformly stratified spherical shells in dependence on Prandtl, Ekman and Rayleigh numbers. Attention is focused on the case in which the thickness of both sublayers (stable and unstable) is identical, which was not investigated before. Influence of stratification is more evident at small values of Rayleigh numbers (large values of Ekman numbers), at large Rayleigh numbers is almost negligible. For small Rayleigh numbers in the case of uniform stratification a large-scale columnar convection is developed in the whole volume, in the case of non-uniform stratification it is suppressed to the unstably stratified region but slightly penetrates to the stably stratified one, except the case of large Prandtl numbers when the convection significantly penetrate to the stably stratified region.
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
Import date
    9. 12. 2013