HD versus MHD. Volume-averaged quantities for the model C.MHD.1000SF.360°, which has initial constant magnetic field in the entire domain, B0 = 0.76 µG, corresponding to a value of β at z = 0 given by β = 30.000 (dashed black line). It is compared with the HD model (β = ∞; continuous line), and the models with initial stratified magnetic fields with β = 300 and 30, corresponding to a magnetic field at z = 0 B0 = 7.6 and 24 µG, respectively (dashed and dotted purple lines). Top panels, from left to right: volume-averaged velocity (|$\bar{v}$|), number density (|$\bar{n}$|), and thermal to magnetic pressure ratio (|$\bar{\beta }$|) and bottom panels: volume-averaged temperature (|$\bar{T}$|), magnetic field intensity (|$\bar{B}$|), and thermal pressure (|$\bar{p}$|).
