Record details

Title
    Hydromagnetic dynamos in rotating spherical fluid shells in dependence on the Prandtl number and stratification
Author
    Hejda, Pavel
    Šimkanin, Ján
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Geophysical Journal International
Vol./nr.
    Roč. 185, č. 2
Pages
    s. 637-646
Year
    2011
Notes
    Projekt: IAA300120704, GA AV ČR3cav_un_auth*0228938
    Projekt: LA09015, GA MŠk3cav_un_auth*0252834
    Rozsah: 10 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    composition of the core
    dynamo
    planetary interiors
    theories and simulations
Keyword
    Dependence
    Dynamos
    Fluid
    Hydromagnetic
    Number
    Prandtl
    Rotating
    Shells
    Spherical
    Stratification
Abstract (in english)
   his paper investigates the dependence of hydromagnetic dynamos on the thermal and viscous diffusion processes and stratification. We analyse cases when thermal and viscous diffusion processes equally affect the dynamo action and when thermal diffusion processes dominate over viscous ones. The spherical shell is considered to be stratified either uniformly or non-uniformly. In the case of non-uniform stratification, the upper thin subshell is stably stratified and the lower subshell is unstably stratified, while for uniform stratification the whole shell is unstably stratified. In all the investigated cases, the generated magnetic field is dipolar.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013