Radostin D. Simitev

Prandtl-number dependence of convection- driven dynamos in rotating spherical fluid shells

The value of the Prandtl number

Parameter dependences of convection-driven dynamos in rotating spherical fluid shells

P

Bistability and hysteresis of dipolar dynamos generated by turbulent convection in rotating spherical shells

exerts a strong influence on convection-driven dynamos in rotating spherical shells filled with electrically conducting fluids. Low Prandtl numbers promote dynamo action through the shear provided by differential rotation, while the generation of magnetic fields is more difficult to sustain in high-Prandtl-number fluids where higher values of the magnetic Prandtl number

Patterns of convection in rotating spherical shells

P_m

Asymptotic properties of mathematical models of excitability

are required. The magnetostrophic approximation often used in dynamo theory appears to be valid only for relatively high values of

Inertial convection in rotating fluid spheres

P

Toroidal flux oscillation as possible cause of geomagnetic excursions and reversals

and

Performance benchmarks for a next generation numerical dynamo model

P_m

Reynolds stresses and mean fields generated by pure waves : applications to shear flows and convection in a rotating shell

. Dynamos with a minimum value of

Remarks on some typical assumptions in dynamo theory

P_m