Table 2.
Overview of simulations with an initial uniform magnetic field Bz = 1 mG.
| Simulation name | h [km] | CS | ηH [109 cm2 s−1] | Reeff | Rem, eff | Prm, eff | τE [s] | ⟨|Bz|⟩ [G] | ⟨Em/Ek⟩ [%] |
|---|---|---|---|---|---|---|---|---|---|
| dh24 | 24 | 0 | 0 | 250 | 238 | 0.95 | … | … | … |
| dh16 | 16 | 0 | 0 | 416 | 389 | 0.93 | … | … | … |
| dh12 | 12 | 0 | 0 | 595 | 553 | 0.93 | 9200 | 9 | 0.2 |
| dh8 | 8 | 0 | 0 | 1023 | 923 | 0.90 | 1440 | 25 | 1.3 |
| dh6 | 6 | 0 | 0 | 1432 | 1278 | 0.89 | 830 | 49 | 1.4 |
| dh6νSηH22 | 6 | 1.55 | 22 | 581 | 930 | 1.6 | 5200 | … | … |
| dh6νSηH25 | 6 | 1.55 | 25 | 574 | 860 | 1.5 | 12 000 | … | … |
| dh6νSηH32 | 6 | 1.55 | 32 | 570 | 740 | 1.3 | … | … | … |
| dh6ηH12 | 6 | 0 | 12 | 1416 | 957 | 0.68 | 5500 | … | … |
| dh6ηH14 | 6 | 0 | 14 | 1428 | 923 | 0.65 | 21 000 | … | … |
Notes. Name, grid spacing h, Smagorinsky coefficient CS, artificial homogeneous magnetic diffusivity ηH, effective Reynolds and magnetic Reynolds numbers Reeff and Rem, eff, effective magnetic Prandtl number Prm, eff, magnetic energy e-folding time τE, and time-averaged unsigned vertical magnetic field ⟨|Bz|⟩ and magnetic-to-kinetic energy ratio ⟨Em/Ek⟩ (the last six parameters are computed as discussed in Sect. 5).
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