Magnetic fields generated by hydromagnetic dynamos at the low Prandtl number in dependence on the Ekman and magnetic Prandtl numbers

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F13%3A00390288" target="_blank" >RIV/67985530:_____/13:00390288 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.pepi.2012.11.002" target="_blank" >http://dx.doi.org/10.1016/j.pepi.2012.11.002</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.pepi.2012.11.002" target="_blank" >10.1016/j.pepi.2012.11.002</a>

Result language
angličtina
Original language name
Magnetic fields generated by hydromagnetic dynamos at the low Prandtl number in dependence on the Ekman and magnetic Prandtl numbers
Original language description
This article investigates the dependence of hydromagnetic dynamos on the magnetic Prandtl number at low Prandtl number. In all the investigated cases, the generated magnetic fields are dipolar and neither transition to hemispherical dynamos nor weaker magnetic fields (which are less dipole dominated) were observed, although the inertia becomes important. The magnetic field becomes weak in the polar regions (is convected out of polar regions??) only for low Prandtl numbers, when the inertia becomes important. It is a basic condition. However, whether the magnetic field gets weak in the polar regions (is convected out of polar regions??) or not depends also on the magnetic Prandtl number. The magnetic Prandtl number has to exceed a minimum value in orderto sustain dynamo action. If the magnetic diffusion is small (large magnetic Prandtl numbers) then this phenomenon does not exist but if it is large (small magnetic Prandtl numbers) it exists because the strong magnetic diffusion signifi
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DE - Earth magnetism, geodesy, geography
OECD FORD branch
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Project
<a href="/en/project/IAA300120704" target="_blank" >IAA300120704: Numerical models of the hydromagnetic processes and geodynamo in the Earth's core</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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