Scalings of steady-state energy spectra for global fan simulation. a) For different values of η with fixed B_s = α = 5 and λ = 0.75. The time taken to reach steady state was t = 8  ×  10⁴, t = 2  ×  10⁴ and t = 6.4  ×  10³ T_ω,p for η = 10^-10, η = 10^-8 and η = 10^-6 respectively. b) For different values of B_s = α with fixed η = 10^-8 and λ = 0.75. Steady-state was reached at t = 2  ×  10⁵, t = 2  ×  10⁴ and t = 5  ×  10³ T_ω,p for B_s = 1, B_s = 5 and B_s = 30 respectively. c) For different values of λ with fixed B_s = α = 5 and η = 10^-8. Time to steady state is t = 10⁵, t = 2  ×  10⁴ and t = 8  ×  10³ T_ω,p for λ = 0.9, λ = 0.75 and λ = 0.3 respectively.