Parameter dependences of convection driven dynamos in rotating spherical fluid shells

Abstract

For the understanding of planetary and stellar dynamos an overview of the major parameter dependences of convection driven dynamos in rotating spherical fluid shells is desirable. Although the computationally accessible parameter space is limited, earlier work is extended with emphasis on higher Prandtl numbers and uniform heat flux condition at the outer boundary. The transition from dynamos dominated by non-axisymmetric components of the magnetic field to those dominated by the axisymmetric components depends on the magnetic Prandtl number as well as on the ordinary Prandtl number for higher values of the rotation parameter $\tau$. The dependence of the transition on the latter parameter is also discussed. A variety of oscillating dynamos is presented and interpreted in terms of dynamo waves, standing oscillation or modified relaxation oscillations.

References in corpus (3)

• Prandtl number dependence of convection driven dynamos in rotating spherical fluid shells
• Patterns of convection in rotating spherical shells
• Inertial convection in rotating fluid spheres

Cited by in corpus (35)

• Turbulent geodynamo simulations: a leap towards Earth's core
• Dipolar versus multipolar dynamos: the influence of the background density stratification
• Bistability and hysteresis of dipolar dynamos generated by turbulent convection in rotating spherical shells
• What controls the magnetic geometry of M dwarfs?
• Oscillatory dynamos and their induction mechanisms
• Effect of shear and magnetic field on the heat-transfer efficiency of convection in rotating spherical shells
• Magnetic cycles in a dynamo simulation of fully convective M-star Proxima Centauri
• Formation of starspots in self-consistent global dynamo models: Polar spots on cool stars
• Turbulent transport coefficients in spherical wedge dynamo simulations of solar-like stars
• Convection-driven spherical shell dynamos at varying Prandtl numbers
• A hemispherical dynamo model : Implications for the Martian crustal magnetization
• MRI-driven $\alpha -\Omega$ dynamos in protoneutron stars
• Convective dynamo action in a spherical shell: symmetries and modulation
• Influence of the mass distribution on the magnetic field topology
• On the reflection of Alfvén waves and its implication for Earth's core modeling
• Topology and field strength in spherical, anelastic dynamo simulations
• Toroidal flux oscillation as possible cause of geomagnetic excursions and reversals
• Dynamo Effects Near The Transition from Solar to Anti-Solar Differential Rotation
• Systematic parameter study of dynamo bifurcations in geodynamo simulations
• Remarks on some typical assumptions in dynamo theory
• Regimes of thermo-compositional convection and related dynamos in rotating spherical shells
• Applications of a finite-volume algorithm for incompressible MHD problems
• Double-diffusive convection in a rotating cylindrical annulus with conical caps
• The onset of thermo-compositional convection in rotating spherical shells
• Physically motivated heat conduction treatment in simulations of solar-like stars: effects on dynamo transitions
• Hemispherical Parker waves driven by thermal shear in planetary dynamos
• Inertia-less convectively-driven dynamo models in the limit of low Rossby number and large Prandtl number
• Gravity darkening in late-type stars. The Coriolis effect
• Bistable attractors in a model of convection-driven spherical dynamos
• Generalised Quasilinear Approximation of the Interaction of Convection and Mean Flows in a Thermal Annulus
• Effects of shell thickness on cross-helicity generation in convection-driven spherical dynamos
• Energy Fluxes during Dynamo Reversals
• Differential rotation in convecting spherical shells with non-uniform viscosity and entropy diffusivity
• A study of global magnetic helicity in self-consistent spherical dynamos
• Influence of Boundary Conditions and Heating Modes on the Onset of Columnar Convection in Rotating Spherical Shells