Table 1.
Dimensionless parameter set (Prandtl, magnetic Prandtl, Ekman, Elsässer, azimuthal Elsässer, stratification, and shear-rate number), with typical values used in DNS and estimates for stellar radiative regions.
| Parameter | DNS | Stellar rad. reg. |
|---|---|---|
| Pr = ν/κ | 10−1 | 10−5 |
| Pm = ν/η | 1 | 10−3 |
| Ek = ν/(ΩR2) | 10−5 | 10−15 |
| ΛZ = BZ2/(ρμ0Ωη) | 1 | 10−5 − 1015 |
| Λϕ = Bϕ2/(ρμ0Ωη) | 1 | 10−5 − 1015 |
| (N/Ω)2 = γg0dRT0/Ω2 | 1 | 1 − 106 |
| |Ro|=|(R/2Ω)dRΩ| | 10−2 − 1 | 10−5 − 100 |
Notes. For the DNS regimes see for instance the parameters used in Petitdemange et al. (2023). For the stellar radiative regions, based on the theoretical analyses of Zahn (1992), Spruit (2002), Mathis & Zahn (2005), and summarised by Maeder (2009), order of magnitudes of flow properties. The magnetic strengths considered account for the large variety of magnetic fields observed (Reiners 2012).
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