In this note, we use an elementary argument to show that the existence and unitarity of radiation fields implies asymptotic partition of energy for the corresponding wave equation. This argument establishes the equipartition of energy for the wave equation on scattering manifolds, asymptotically hyperbolic manifolds, asymptotically complex hyperbolic manifolds, and the Schwarzschild spacetime. ...

[1] To study the fetch-limited growth of wind wave energy over a region with significant lateral shear of the current field, this study exploited data obtained from two linear phased-array High Frequency (HF) radar systems. Both the near-surface currents and wave energy and period were mapped over the highly sheared inshore boundary of the Florida Current. The wave energy growth during two peri...

This note addresses the concept of wave energy conversion by means of piezoelectric material. The ocean surface waves represent an important source of energy power. A multiphysics simulation is used to focus on different aspects, namely the free surface wave, the fluid-structure-interactio, the mechanical energy input to the piezoelectric material and finally the electric power output using an ...

A computationally efficient approximate analytical solution based on the classic solution for diffraction about a semi-infinite breakwater, is developed to assess the wave energy shadow down-wave of a single row array of overtopping type wave energy converters approximated as partially transmitting breakwater segments. The approximations associated with the solution are mitigated by a compariso...

Generating power is of great importance in today’s world. Due to the pending exhaustion of fossil fuels and to their environmental impact it is crucial to develop clean renewable energy sources. Ocean energy is one of the candidates being a huge, yet unexploited renewable energy source on our planet. Preliminary surveys show that marine power has a potential to supply a significant part of the ...

The paper presents an investigation of fix-referenced and self-referenced wave energy converters and a comparison of their corresponding wave energy conversion capacities from real seas. For conducting the comparisons, two popular wave energy converters, point absorber and oscillating water column, and their power conversion capacities in the fixed-referenced and self-referenced forms have been...

a numerical model for two-phase debris flows is developed in this paper, on the basis of understanding of the physical characteristics of debris flows from field investigations and experiments. employing a moving coordinate, the kinetic energy equation of gravel particles in unit volume in debris flow is developed by considering the potential energy of the particles, energy from the liquid phas...