This paper presents a numerical investigation on the harmonic structure of hydrodynamic forces fixed and simplified representative floating production, storage offloading (FPSO) vessel hull under dispersive phase-focused wave groups. The high-fidelity model utilizes two-phase flow solver in open-source toolbox OpenFOAM. A series cases were computed using model, where effects steepness, bow diam...

We have investigated the role of wave-front curvature on propagation by following the wave front that was diffracted through a narrow isthmus created in a two-dimensional ionic model (Luo-Rudy) of ventricular muscle and in a thin (0.5-mm) sheet of sheep ventricular epicardial muscle. The electrical activity in the experimental preparations was imaged by using a high-resolution video camera that...

The time-average wave power that is absorbed from an incident wave by means of a wave-energy conversion (WEC) unit, or by an array of WEC units-i.e. oscillating immersed bodies and/or oscillating water columns (OWCs)-may be mathematically expressed in terms of the WEC units' complex oscillation amplitudes, or in terms of the generated outgoing (diffracted plus radiated) waves, or alternatively,...

We solve the two-dimensional problem of acoustic scattering by a semi-infinite periodic array of identical isotropic point scatterers, i.e. objects whose size is negligible compared to the incident wavelength and which are assumed to scatter incident waves uniformly in all directions. This model is appropriate for scatterers on which Dirichlet boundary conditions are applied in the limit as the...

Extremely asymmetrical scattering (EAS) is an unusual type of Bragg scattering in slanted periodic gratings with the scattered wave (the +1 diffracted order) propagating parallel to the grating boundaries. Here, a unique and strong sensitivity of EAS to small stepwise variations of mean structural parameters at the grating boundaries is predicted theoretically (by means of approximate and rigor...

Bethe potentials were introduced by Bethe in 1928 to reduce the size of the dynamical matrix in electron scattering problems using first order perturbation theory [1]. The standard approach is to start from the dynamical equations in the Bloch wave representation, and split the set of diffracted beams into two subsets, namely strong and weak beams, according to some appropriate criterion. While...