Flow‐plant interactions in open‐channel flows: A comparative analysis of five freshwater plant species

摘要: [1] The paper reports a laboratory study of drag forces exerted on aquatic vegetation and their coupling with flow turbulence. The experiments were conducted in 12.5 m long 0.30 wide flume, using five different freshwater plant species (Ranunculus penicillatus, Fontinalis antipyretica, Myriophyllum alterniflorum, Glyceria fluitans, Callitriche stagnalis). Velocity components measured two acoustic Doppler velocimeters (ADV) specially designed measurement device. Drag fluctuations the plants appeared to be closely related ambient turbulence, especially large-scale turbulent structures. enhanced energy downstream from was associated wake generation, its magnitude controlled by morphology reconfiguration. Frequency spectra reveal frequency range where they follow power law that can parameterized properties. rescaled spectral functions are shown match collected data reasonably well. In addition, drag-velocity cross-correlation analyses enabled estimation location resultant force, which interpreted as an integral measure adaptation flow. results revealed degrees flowing water, withFontinalis showing best hydrodynamic performances, i.e., lower levels turbulence generation.