Physics
Scientific paper
Apr 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011pepi..185..100s&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 185, Issue 3-4, p. 100-106.
Physics
Scientific paper
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. Similarly as in the case of rotating convection also in the case of dynamo action the multilayer convection (“teleconvection”) is not developed in such a case because of the significant amount of stable stratification.
Hejda Pavel
Saxonbergová Dana
Šimkanin Ján
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