Configurations of the radiative and convective spherical shells for the case of a trilayer structure. In brown we show the convective layer. In orange we plot the radiative layer. The red arrows represent the energy fluxes (F_E), the black arrows correspond to the angular momentum fluxes (F_J) for prograde waves (m > 0), and the blue arrows stand for the angular momentum fluxes in the case of retrograde waves (m < 0).