Contributions of different energy fluxes of Runs A (top) and E (bottom). The black (red) lines correspond to magnetohydrodynamic (hydrodynamic) case. Thin solid: radiative, dashed: convective, long dashed: viscous, dash-dotted: kinetic energy, dash-triple-dotted: SGS, and thick solid: total. Dotted horizontal lines indicate the zero and unity values. The vertical dotted line indicates the position of the middle of the convection zone r = r_m.