Evolution of k₂ as a function of stellar radius for: three GENEC models with an initial mass of 32.8 M_⊙, overshooting parameter 0.20, Z = 0.015 and ξ = 1; the single version (blue) and the binary version (green) with initial rotational velocities of v_eq,ini = 100 km s⁻¹; and the single version with zero initial rotational velocity (v_eq,ini = 0 km s⁻¹, violet). We note that the green and blue curves overlap perfectly until the green curve stops around ∼20 R_⊙. Two Clés models with an initial mass of 32.8 M_⊙, α_ov = 0.20, Z = 0.015, and ξ = 1 – one without turbulent diffusion (pink) and one with D_T = −2.41 × 10⁷ cm² s⁻¹ (orange) – are also presented for comparison.