517471.fig.0011a
(a)
517471.fig.0011b
(b)
517471.fig.0011c
(c)
Figure 11: Transfer function Htransversal(ω); modulus versus frequency (a), phase versus frequency (b); coherence between ftransversal and ucentral versus frequency (Hz) (c); in still water, and for 3.4 m/s and 4.9 m/s fluid velocities.