Boundary layer flow induced by waves with acceleration skewness

Young Coastal Scientists and Engineers Conference 2007, PlymouthPeer reviewedPostprin

A 3D unstructured grid nearshore hydrodynamic model based on the vortex force formalism

Acknowledgments This work was partly supported by joint Engineering and Physical Science Research Council (EPSRC) UK and Technology Foundation STW Netherlands funded SINBAD (EP/J005541/1) project. P. Zheng was supported by the China Scholarship Council during his four-year PhD study at the University of Liverpool. We would like to thank Prof. C.S. Chen of the University of Massachusetts-Dartmouth for providing the source code of FVCOM and also the SWAN developers for developing and providing this open source code. We would also like to thank the staff and personnel involved in collecting and maintaining the DUCK’94 experiment dataset and the anonymous reviewers for their constructive comments and suggestions. Computational support was provided by the Chadwick High Performance Computer at University of Liverpool and also the facilities of N8 HPC Centre of Excellence, provided and funded by the N8 consortium and EPSRC (EP/K000225/1).Peer reviewedPublisher PD

Near-Bed Turbulent Kinetic Energy Budget Under a Large-Scale Plunging Breaking Wave Over a Fixed Bar

Hydrodynamics under regular plunging breaking waves over a fixed breaker bar were studied in a large-scale wave flume. A previous paper reported on the outer flow hydrodynamics; the present paper focuses on the turbulence dynamics near the bed (up to 0.10 m from the bed). Velocities were measured with high spatial and temporal resolution using a two component laser Doppler anemometer. The results show that even at close distance from the bed (1 mm), the turbulent kinetic energy (TKE) increases by a factor five between the shoaling, and breaking regions because of invasion of wave breaking turbulence. The sign and phase behavior of the time-dependent Reynolds shear stresses at elevations up to approximately 0.02 m from the bed (roughly twice the elevation of the boundary layer overshoot) are mainly controlled by local bed-shear-generated turbulence, but at higher elevations Reynolds stresses are controlled by wave breaking turbulence. The measurements are subsequently analyzed to investigate the TKE budget at wave-averaged and intrawave time scales. Horizontal and vertical turbulence advection, production, and dissipation are the major terms. A two-dimensional wave-averaged circulation drives advection of wave breaking turbulence through the near-bed layer, resulting in a net downward influx in the bar trough region, followed by seaward advection along the bar's shoreward slope, and an upward outflux above the bar crest. The strongly nonuniform flow across the bar combined with the presence of anisotropic turbulence enhances turbulent production rates near the bed

Turbulence statistics in smooth wall oscillatory boundary layer flow

This work has been carried out within the SINBAD project, funded through the UK’s Engineering and Physical Sciences Research Council (EPSRC grant EP/J00507X/1). PS acknowledges the funding from the University of Aberdeen to support his Honoray Research Fellowship and funding from the Ministero dell’Istruzione dell’Universit`a e della Ricerca through PRIN 2012 “Hydromorphodynamic and modeling of coastal processes for engineering purposes”. The authors acknowledge the support of the technical staff at the University of Aberdeen, especially Fluids Laboratory Technician Roy Gillanders. The experimental and numerical datasets presented in this paper are available on https://dx.doi.org/10.5281/zenodo.1095116.Peer reviewedPostprin

Experimental study of the turbulent boundary layer in acceleration-skewed oscillatory flow

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Suspended and bedload transport in the surfzone : implications for sand transport models

ACKNOWLEDGMENTS The research presented in this paper is conducted within the SINBAD project, funded by STW (12058) and EPSRC (EP/J00507X/1, EP/J005541/1), and received additional funding through the European Community’s FP7 project Hydralab IV (contract no. 261520).Publisher PD

A frequency distributed dissipation model for canopies

Robert C. Houseago (University of Hull) conducted the data collection with assistance from University of Aberdeen students Ross Horgan and Rory Summers. The artificial vegetation flexibilities and densities were designed by Robert C. Houseago as part of his University of Hull funded PhD study on the effect of flexibility on in-canopy hydrodynamics. The University of Aberdeen wave flume experiments were supported by the European Communitys Horizon 2020 Programme through the grant to the budget of the Integrated Infrastructure Initiative HYDRALAB+, Contract no. 654110. The support of Mary Anderson Bryant and Jane Smith for providing their insight is graciously acknowledged. The support of the Coastal Structures and Wave Department of Deltares is acknowledged. This work was funded by the U.S. Department of Defense and Deltares through the Engineer and Scientist Exchange Program (ESEP) and the U.S. Army Corps of Engineers through the Engineering With Nature® (EWN®) initiative.Peer reviewedPostprin

Flow-induced vibration of a cantilevered cylinder in oscillatory flow at high KC

Acknowledgements This work is part of the first author’s Ph.D. research funded by the University of Aberdeen, United Kingdom. DA acknowledges support from a Royal Society Research Grant (180372). The authors acknowledge the support of the technical staff at the University of Aberdeen, United Kingdom , especially Fluids Laboratory Technician Roy Gillanders.Peer reviewedPostprin

Sand suspension and fluxes by wave groups and equivalent monochromatic waves

We thank the technical staff of the UPC CIEMLAB and Sjoerd van Til for their contributions to the experiments, and the editor and an anonymous reviewer for their useful feedback on the manuscript. The experimental work was supported by the European Community's Seventh Framework Programme through the grant to the budget of the Integrating Activity HYDRALAB IV within the Transnational Access Activities, Contract no. 261520, with additional funding from the Dutch Technology Foundation STW (project 12058) and the UK’s Engineering and Physical Sciences Research Council (EPSRC, grant number EP/J00507X/1) through the SINBAD project. JvdZ was funded through the European Community’s H2020 Programme HYDRALAB+ (Contract no. 654110). The presented data are stored in the 4TU online data repository (https://doi.org/10.4121/uuid:30496cc3-9803-4c18-8a6f-85513bb29c3d).Peer reviewedPostprin