Simulations of the m = 2 mode with v₀/v_A, i = 0.05 and ρ_i/ρ_e = 5. Cross-sectional cuts of the density at the tube center, z = 0, for the cases with l/R = 0 (top left), l/R = 0.25 (top right), l/R = 0.5 (bottom left), and l/R = 1 (bottom right). Only a subregion of the complete numerical domain in the vicinity of the flux tube is shown. A snapshot of the evolution at t/P_k = 2.19 is displayed in the still image. The complete temporal evolution is available in the accompanying movie.