Top: velocity at R = 1.5 R_⋆, in the CO⁵BOLD model st28gm06n26, considering only the +x direction, the same quantity as in the lower right panel in Fig. 6. Middle: reconstructed boundary condition, used in the DARWIN model l70t27. Bottom: velocity at R = 1.5 R_⋆for the DARWIN model l70t27 using the reconstructed boundary condition from the middle panel (green), compared to the velocity of the original CO⁵BOLD model (grey).