Toroidal field B_ϕ normalised to the initial amplitude of the poloidal field B₀, as a function of (P_m/L_u)²Re_c/E and at the particular location θ = π/6 and r = 0.65r₀. The different symbols correspond to the different runs D1–D7 of Table 1 (no contraction term in induction equation) namely, Re_c = 10⁻¹, L_u = 10⁴ (circle); Re_c = 10⁻¹, L_u = 5 × 10⁴ (square); Re_c = 1, L_u = 5 × 10³ (hexagon); Re_c = 1, L_u = 10⁴ (up triangle); Re_c = 1, L_u = 5 × 10⁴ (pentagon); Re_c = 5, L_u = 10⁴ (down triangle) and Re_c = 5, L_u = 5 × 10⁴ (diamond). The other parameters are fixed to E = 10⁻⁴, P_r(N₀/Ω₀)² = 10⁴, and P_m = 10².