Hydromagnetic dynamos in rotating non-uniformly stratified spherical fluid shells in dependence on the Rayleigh number

0363811 - GFÚ 2012 RIV NL eng J - Článek v odborném periodiku
Šimkanin, Ján - Hejda, Pavel - Saxonbergová, Dana
Hydromagnetic dynamos in rotating non-uniformly stratified spherical fluid shells in dependence on the Rayleigh number.
Physics of the Earth and Planetary Interiors. Roč. 185, č. 3-4 (2011), s. 100-106. ISSN 0031-9201. E-ISSN 1872-7395
Grant CEP: GA AV ČR IAA300120704
Výzkumný záměr: CEZ:AV0Z30120515; CEZ:AV0Z30420517
Klíčová slova: hydromagnetic dynamo * non-uniform stratification * penetrative convection * Rayleigh number
Kód oboru RIV: DE - Zemský magnetismus, geodézie, geografie
Impakt faktor: 2.319, rok: 2011

We present an investigation of dynamo in non-uniformly stratified spherical shells dependent on the Rayleigh number and thickness of a stable stratified sub-shell with emphasis on the case characterized by the identical thicknesses of both sub-shells. Our previous study of rotating convection showed that this case of stratification is a typical extreme case. However, the dynamo action in the shell characterized by the identical thicknesses of both sub-shells is not the typical extreme case. The generated magnetic field is close to the cases of uniform stratification and non-uniform one if the thickness of a stable stratified sub-shell is smaller than the thickness of an unstable stratified sub-shell.
Trvalý link: http://hdl.handle.net/11104/0199467