U_rms(r) against radius profiles averaged over time. That is the last 400 s for the FN1 simulation (represented by the green curve), 400 s for the FN2 simulation (represented by the blue curve), and the last 500 s for the NB1 simulation (represented by the orange curve). The vertical dashed lines indicate the R_conv for the FN2 (blue) and NB1 (orange) simulations. The red vertical dashed–dotted line indicates the location of the Urca Shell.