a) Evolution of the Fourier mode for the magnetic energy density for model N22H5; b) evolution of several energy components for model N22H5; and c) the same as b) but for model N22H1. All the energy components are normalized by the rest mass, and the time axes are shown in units of M₀ (bottom) and (top). The internal energy is split into the adiabatic and heating parts (see the text for more details).