Circulation pattern of Eddington–Sweet circulation in a single star Cowling point source model with electron scattering opacity, M = 3 M_⊙, R = 1.75 R_⊙L = 93 L_⊙ and ϵ = 0.1. Only the outer circulation cells in the northern hemisphere are shown. The green arrows give the direction of the motion. The central convective region is marked in red, the pole is marked with a blue cross and the radiative envelope is shown in opaque grey. This figure is a reproduction of Fig. 3 of Tassoul & Tassoul (1982b).