Figure 4 | Scientific Reports

Figure 4

From: Flow and wake characteristics associated with large wood to inform river restoration

Figure 4

(a) and (b) Photos of C2e with 50-cm long emergent log and C4s with 50-cm long submerged log with tracer injected upstream of log to illustrate the presence (a) and absence (b) of a von-Kármán vortex street. When present, the vortex street was unsteady, with vortices forming and shedding from either end of the log in a regular alternating pattern. (a) illustrates the formation of a single vortex on the left-side of the log, and subsequently a vortex forms on the right-hand side; (c) and (d) Power spectra of lateral flow velocity component measured at log center at maximum kt.

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