Phase-averaged organized oscillation velocities (U,V,W) and random fluctuation Reynolds stresses ( uw , uv , ww , vv , uu ) are presented for the nominal wake of a surface ship advancing in regular head (incident) waves, but restrained from body motions, i.e., the forward-speed diffraction problem. A 3 × 3 × 100 m towing tank, plunger wave maker, and towed, 2D particle-image velocimetry (PIV) a...

We conduct an experimental study of axisymmetric gravity-capillary standing waves generated by a vertically vibrating ring on fluid surface. Different regimes are highlighted at the basin center: linear, nonlinear, and ejection regimes. For moderate forcing, spatial profile breaks up-down symmetry as predicted third-order nonlinear theory, whereas for stronger maximum height reached gravity-wav...

The form of steep capillary waves is of interest as a possible initial condition for the formation of air bubbles at a free surface. In this paper the limiting forms of pure capillary waves and of quasi-capillary waves are studied analytically. Crapper’s finite-amplitude solution is expressed in a simple form, and is shown to be one of several exact elementary solutions to the pure-capillary fr...

Channel steepness index, ks, is a metric derived from the stream power model that, under certain conditions, scales with relative rock uplift rate. index property of rivers, which can be relatively easily extracted digital elevation models (DEMs). As DEM data sets are widely available for Earth and becoming more readily other planetary bodies, channel represents powerful tool interpreting tecto...

A fully nonlinear potential Numerical Wave Tank (NWT) is developed in two dimensions, using a combination of the Harmonic Polynomial Cell (HPC) method for solving Laplace problem on wave and Immersed Boundary Method (IBM) capturing free surface motion. This NWT can consider fixed, submerged or wall-sided piercing, bodies. To compute flow around body associated pressure field, novel multi overla...

This study, which is performed in the framework of the European Project MAXWAVE, deals with both theoretical aspects of extreme waves description as well as new techniques to observe these waves using different remote sensing techniques. The final goal is to improve the understanding of the physical processes responsible for the generation of extreme waves and to identify geophysical conditions...

A number of existing models for surface wave phase speeds (linear and non-linear, breaking and non-breaking waves) are reviewed and tested against phase speed data from a large-scale laboratory experiment. The results of these tests are utilized in the context of assessing the potential improvement gained by incorporating wave non-linearity in phase speed based depth inversions. The analysis is...

The allowable mean overtopping discharge is used as a design parameter for coastal structures. crest elevation of structures should ensure the wave within acceptable limits structural safety and pedestrians, vehicles, operations, so on. In this study, two-dimensional physical model tests on typical rubble-mound structure geometries were performed discharges under various water depth conditions ...

The wave-energy excitation of point absorbers is highly associated with their resonant movement, and harmonic characteristics are increasing concern in affecting resonance. However, the commonly used linearized power take-off (PTO) systems underestimate impact harmonics. purpose this study to address knowledge gap assessing contribution hydraulic PTO higher wave loads velocities. In present wor...

Abstract Breaking wave effect on Wave Energy Converter (WEC) represents an important issue of site selection analysis especially fringing reefs area. To learn a more acceptable sense the influence this effect, introspection estimate initial breaker points is proposed in present study. The paper describes investigation impact assessment wave-breaking criteria subjected to WEC recently desired as...