This paper considers the history of oscillating water column (OWC) systems from whistling buoys to grid-connected power generation systems. The power conversion from the wave resource through to electricity via pneumatic and shaft power is discussed in general terms and with specific reference to Voith Hydro Wavegen’s land installed marine energy transformer (LIMPET) plant on the Scottish islan...

Based on the linear wave theory, the mild-slope equation (MSE) is a preferable mathematical model to simulate the wave propagation nearshore. On the basis of developed self-adaptive finite element model, an interative method is used to determine the wave direction angle to the boundary and to improve the treatment of the boundary conditions. Thus a numerical model to solve MSE is developed in t...

Samoa is located in the South Pacific Ocean, about halfway between Hawaii and New Zealand. The first wharf at Apia (185m long) was constructed 1966 a 100m long breakwater with 8t Dolos armor units 1988-89 to provide shelter. Following large cyclones early 1990s, rehabilitated 1996 larger 20t units. In 2003 solid concrete crown wall added mitigate wave transmission into harbor. There limited toe...

The indispensable vital structure in any harbor is a breakwater in order to make available calm water region inshore. Pile breakwater can be employed as a small coastal protection structure where tranquility required is low. This study is concerned with CFD study on the performance of perforated hollow pile to dissipate wave energy and the novelty of this investigation is the role of perforatio...

In this paper wave transformation in a submerged sloped breakwater and its hydraulic performance was simulated by developing a numerical model in Fortran. The code was established by combining porous flow and a two-phase model using VOF method. Modified Navier-Stokes and k-ε equations implemented to the model to simulate the flow in porous media. Cut cell method was modified to simulate...

In this paper, the large amount of sedimentation and the resultant shoreline advancements at the breakwaters of Beris Fishery Port are studied. A series of numerical modeling of waves, sediment transport, and shoreline changes were conducted to predict the complicated equilibrium shoreline. The outputs show that the nearshore directions of wave components are not perpendicular to the coast whic...

Based on the open-source code DualSPHysics, a numerical model was conducted to simulate regular wave transformation slope breakwater with artificial block, and simulation results were verified according measured data from physical experiment. The deviation between less than 6% 9% in run-up overtopping, respectively, which demonstrated can reliably capture evolution an block. this model, size of...

A depth-averaged non-hydrostatic model is formulated to investigate wave evolution on a water channel with submerged trapezoidal breakwater. This an extension of nonlinear shallow equations that includes hydrodynamic pressure and vertical velocity. In the momentum equation, diffusion term also considered represent turbulence effects in system. The are solved numerically using combination stagge...

An oral sustained-release floating tablet formulation of metformin HCl was designed and developed. Effervescence and swelling properties were attributed on the developed tablets by sodium bicarbonate and HPMC-PEO polymer combination, respectively. Tablet composition was optimized by response surface methodology (RSM). Seventeen (17) trial formulations were analyzed according to Box-Behnken desi...