517471.fig.0012a
(a)
517471.fig.0012b
(b)
517471.fig.0012c
(c)
Figure 12: Transfer function Hcorner(ω); modulus versus frequency (a), phase versus frequency (b); coherence between fcorner and ucentral versus frequency (c); in still water, and for 3.4 m/s and 4.9 m/s fluid velocities.