Left: radial profiles of the reference density (red/solid line) and temperature (blue/dotted line) as a function of the normalized radius. Middle: radial profiles of the entropy gradient. The vertical dotted line marks the radius where d/dr changes sign. It corresponds to the initial limit between convective and radiative zones. Right: radial energy flux balance converted into luminosity and normalized to the solar luminosity L_⊙. The values have been averaged over latitude, longitude and time (≈30 days). We show the contribution to the energy flux from radiative diffusion (long dashes), enthalpy (three-dot-dashed), kinetic energy (dash-dot), modeled SGS processes (dot), and viscous diffusion (dashes). The solid line is the sum of all these components.