Remarks on some typical assumptions in dynamo theory
arXiv:1012.1506 · doi:10.1080/03091929.2010.519891
Abstract
Some concepts used in the theory of convection-driven dynamos in rotating spherical fluid shells are discussed. The analogy between imposed magnetic fields and those generated by dynamo action is evaluated and the role of the Elsasser number is considered. Eddy diffusivities are essential ingredients in numerical dynamo simulations, but their effects could be misleading. New aspects of the simultaneous existence of different dynamo states are described.
Published in Geophys. Astrophys. Fluid Dyn
References in corpus (5)
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- Prandtl number dependence of convection driven dynamos in rotating spherical fluid shells
- Bistability and hysteresis of dipolar dynamos generated by turbulent convection in rotating spherical shells
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- Regimes of thermo-compositional convection and related dynamos in rotating spherical shells
- Double-diffusive convection in a rotating cylindrical annulus with conical caps
- Baroclinically-driven flows and dynamo action in rotating spherical fluid shells
- Effects of shell thickness on cross-helicity generation in convection-driven spherical dynamos
- Flows and dynamos in a model of stellar radiative zones
- A study of global magnetic helicity in self-consistent spherical dynamos