Table 1 Control parameters of the numerical simulations.

From: Scale separated low viscosity dynamos and dissipation within the Earth’s core

Name

E /10−6

Ra/Rac

q = Prm

R m

Re

S0a

1.1834

14.4

0.20

63

315

HYDRO0

1.1834

14.4

  

457

S1

1.1834

72

0.20

180

900

S2

1.1834

432

0.20

868

4340

S4

0.2959

432

0.05

274

5480

  1. E is the Ekman number, Ra is the Rayleigh number, Prm is the magnetic Prandtl number. Output characteristics are the magnetic Reynolds number Rm and the conventional Reynolds number Re. The Prandtl number is unity for all runs. Rac is the critical Rayleigh number for the onset of non-magnetic convection.
  2. The Rayleigh number is measured relative to the critical Rayleigh number for the onset of convection, Rac, and the Prandtl number Pr = 1.
  3. aS0 is as in ref.8 but with ten times lower Ra.
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