Journal
EPL
Volume 85, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/85/19001
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Funding
- Royal Society [CG0868174]
- STFC [ST/H008799/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H008799/1] Funding Source: researchfish
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Bistability and hysteresis of magnetohydrodynamic dipolar dynamos generated by turbulent convection in rotating spherical fluid shells is demonstrated. Hysteresis appears as a transition between two distinct regimes of dipolar dynamos with rather different properties including a pronounced difference in the amplitude of the axisymmetric poloidal field component and in the form of the differential rotation. The bistability occurs from the onset of dynamo action up to about 9 times the critical value of the Rayleigh number for onset of convection and over a wide range of values of the ordinary and the magnetic Prandtl numbers including the value unity. Copyright (C) EPLA, 2009
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