The present study examines the wave type and steepness impacts onto floating offshore wind turbine (FOWT) hydro/aerodynamics. With aid of using a high-fidelity aero-hydro-mooring CFD solver, current modelling focuses on analysis NREL 5 MW semi-submersible FOWT dynamic motion response, tension load mooring line, thrust, power output tower base bending moment. Totally, three types waves, i.e., fo...

Steepness is a generic geometric property which, together with complex-analyticity, needed in order to ensure stability of nearly-integrable hamiltonian system over exponentially long times. Following strategy developed by Nekhoroshev, we construct sufficient conditions for steepness given function that involve algebraic equations on its derivatives up five. This important view applications (e....

The concept of heuristic decision making is adapted to dynamic influence processes in social networks. We report results of a set of simulations, in which we systematically varied: a) the members’ strategies for contacting fellow group members and integrating collected information, b) the steepness of status distributions in a network, and c) the clustering structure of the members’ communicati...

Abstract In order to understand the mechanism of surf-riding/broaching profoundly, four- degree- of-freedom(4DOF) maneuvering equation (surge, sway, yaw and roll) is simplified a one- degree-of-freedom (1DOF) equation, fourth-order Runge-Kutta method used integrate 1DOF surge in time domain analyze two motion states ship during surging surf-riding. The critical Froude number calculated using Me...

The Akhmediev breather (AB) solution of the nonlinear Schrödinger equation (NLSE) shows that maximum crest height modulated wave trains reaches triple initial amplitude as a consequence long-term evolution. Several fully numerical studies have indicated amplification can exceed 3, but its physical mechanism has not been clarified. This study spectral broadening, bound-wave production, and phase...

Two-phase Reynolds Averaged Navier-Stokes (RANS) simulations of breaking waves are susceptible to an unphysical thickening the plunging crest. This is often times incorrectly attributed deficiencies in interface capturing scheme although, reality, issue stems from nature density treatment momentum advection. If considered face-centered advection term, resulting formulation conservative whilst i...

The surface gravity wave equation is expanded to the fourth-order steepness on slowly varying topography, obtaining a topographic modified nonlinear Schrödinger (TMNLS) equation. When time scale longer than ε -3 times of dominant period or space larger wavelength, second water depth derivative and square first affect first-order amplitude. instability area for uniform Stokes train by small pert...

Ž . Two depth inÕersion algorithms DIA applicable to coastal waters are developed, calibrated, and validated based on results of computations of periodic waves shoaling over mild slopes, in a Ž . two-dimensional numerical waÕe tank based on fully nonlinear potential flow FNPF theory. In actual field situations, these algorithms would be used to predict the cross-shore depth variation h based on...