Flow field and wake structure characteristics imposed by single seagrass blade surrogates

Seagrass surrogates are commonly used to mimic the behaviour of seagrasses exposed currents and their effects on flow fields. The interaction is highly dependent chosen mechanic geometric properties needs be understood in order design artificial meadows. single unidirectional fields studied by means physical modelling. Surrogates made plastic materials with different flexural rigidities, buoyancies geometries varying velocities. instantaneous velocity vicinity wake measured stereoscopic Particle Image Velocimetry (PIV). All employed disrupt interact field changing posture. An empirical relation derived between rigidity, buoyancy characteristic diameter imposed differences attenuation ratio Further, approaching distance behind surrogate influence estimated attenuation. vortex shedding frequency seagrass lower than frequencies determined for infinite, rigid cylindrical structures. Three main characterizing properties: modulus elasticity, cross-sectional dimensions need taken into account Our findings advance knowledge fluid-structure interactions flexible help progress proper