caa a22 4500 606197400 CHVBK 20210128100929.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s00348-015-1989-4 doi (NATIONALLICENCE)springer-10.1007/s00348-015-1989-4 Whole-wavelength description of a wave boundary layer over permeable wall [Elektronische Daten] [Massimo Miozzi, Matteo Postacchini, Sara Corvaro, Maurizio Brocchini] This paper describes the whole-wavelength, highly resolved velocity field statistics in an oscillatory boundary layer driven by gravity waves, evolving on both impermeable and permeable beds. Velocity data from PTV measurements are acquired in a small window and then extended to the whole wavelength by means of a new phase-locked slotting technique. This technique increases the robustness of statistics and resolution by improving the number of the data samples available for each spatial cell in the Eulerian representation of the oscillatory boundary layer. The into- and out-of-bed volume flux is evaluated and its effects on the velocity field are reported, together with its influence on vorticity evolution. The presence of coherent structures embedded in a shear-dominated scenario is emphasized. The Lagrangian flow features extracted by PTV are presented in the context of the generalized Lagrangian-mean theory. The Stokes drift vertical profile is estimated by comparing the Eulerian and Lagrangian velocities. A critical height-separating region where the volume flux due to ventilation has different effects on both orbital amplitudes and Stokes drift is found. This distance corresponds to the maximum height of the still-attached vorticity layer. Springer-Verlag Berlin Heidelberg, 2015 Miozzi Massimo CNR - INSEAN, Via di Vallerano 139, 00128, Rome, Italy aut Postacchini Matteo Department of ICEA, Università Politecnica delle Marche, Via Brecce Bianche 12, 60131, Ancona, Italy aut Corvaro Sara Department of ICEA, Università Politecnica delle Marche, Via Brecce Bianche 12, 60131, Ancona, Italy aut Brocchini Maurizio Department of ICEA, Università Politecnica delle Marche, Via Brecce Bianche 12, 60131, Ancona, Italy aut Experiments in Fluids Springer Berlin Heidelberg 56/6(2015-06-01), 1-19 0723-4864 56:6<1 2015 56 348 https://doi.org/10.1007/s00348-015-1989-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-1989-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Miozzi Massimo CNR - INSEAN, Via di Vallerano 139, 00128, Rome, Italy aut NATIONALLICENCE 700 1- Postacchini Matteo Department of ICEA, Università Politecnica delle Marche, Via Brecce Bianche 12, 60131, Ancona, Italy aut NATIONALLICENCE 700 1- Corvaro Sara Department of ICEA, Università Politecnica delle Marche, Via Brecce Bianche 12, 60131, Ancona, Italy aut NATIONALLICENCE 700 1- Brocchini Maurizio Department of ICEA, Università Politecnica delle Marche, Via Brecce Bianche 12, 60131, Ancona, Italy aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/6(2015-06-01), 1-19 0723-4864 56:6<1 2015 56 348