scholarly journals RAPID CALCULATION OF NONLINEAR WAVE-WAVE INTERACTIONS

2011 ◽  
Vol 1 (32) ◽  
pp. 36 ◽  
Author(s):  
Lihwa Lin ◽  
Zeki Demirbilek ◽  
Jinhai Zheng ◽  
Hajime Mase
Keyword(s):  
Energy Transfer ◽  
Shallow Water ◽  
Nonlinear Wave ◽  
Ocean Waves ◽  
Wave Transformation ◽  
Calculation Algorithm ◽  
Wave Interactions ◽  
Nonlinear Energy Transfer ◽  
Rapid Calculation ◽  
Nonlinear Energy

This paper presents an efficient numerical algorithm for the nonlinear wave-wave interactions that can be important in the evolution of coastal waves. Indeed, ocean waves truly interact with each others. However, because ocean waves can also interact with the atmosphere such as under variable wind and pressure fields, and waves will deform from deep to shallow water, it is generally difficult to differentiate the actual amount of the nonlinear energy transfer among spectral waves mixed with the atmospheric input and wave breaking. The classical derivation of the nonlinear wave energy transfer has involved tedious numerical calculation that appears impractical to the engineering application. The present study proposed a theoretically based formulation to efficiently calculate nonlinear wave-wave interactions in the spectral wave transformation equation. It is approved to perform well in both idealized and real application examples. This rapid calculation algorithm indicates the nonlinear energy transfer is more significant in the intermediate depth than in deep and shallow water conditions.

scholarly journals GENERATION OF EXTREME TRANSIENT WAVES IN EXPERIMENTAL MODELS

2018 ◽  
pp. 51
Author(s):  
Huichen Zhang ◽  
Markus Brühl
Keyword(s):  
Shallow Water ◽  
Nonlinear Wave ◽  
Wave Generation ◽  
Experimental Models ◽  
Scale Model ◽  
Wave Transformation ◽  
Wave Analysis ◽  
Transient Waves ◽  
Wave Interactions ◽  
Wave Flume

The transfer of natural waves and sea states into small- and large-scale model teste contributes to the proper design of offshore and coastal structure. Such shallow-water ocean surface waves are highly nonlinear and subject to wave transformation and nonlinear wave-wave interactions. However, the standard methods of wave generation according to conventional wave theories and wave analysis methods are limited to simple regular waves, simple sea states and low-order wave generation without considering the nonlinear wave-wave interactions. The research project Generation of Extreme Transient Waves in Experimental Models (ExTraWaG) aims to accurately generate target transient wave profile at a pre-defined position in the wave flume (transfer point) under shallow water conditions. For this purpose, the KdV-based nonlinear Fourier transform is introduced as a continuative wave analysis method and is applied to investigate the nonlinear spectral character of experimental wave data. Furthermore, the method is applied to generate transient nonlinear waves as specific locations in the wave flume, considering the nonlinear transformation and interactions of the propagating waves.

scholarly journals Evaluation of Spatial Variation of Nonlinear Energy Transfer by Use of Turbulence Diagnostic Simulator

2013 ◽  
Vol 8 (0) ◽  
pp. 2403070-2403070 ◽  
Author(s):  
Naohiro KASUYA ◽  
Satoru SUGITA ◽  
Makoto SASAKI ◽  
Shigeru INAGAKI ◽  
Masatoshi YAGI ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Spatial Variation ◽  
Nonlinear Energy Transfer ◽  
Nonlinear Energy

scholarly journals Influence of Accuracy Improvement of Nonlinear Energy Transfer in Wave Model

2009 ◽  
Vol 65 (1) ◽  
pp. 171-175
Author(s):  
Noriaki HASHIMOTO ◽  
Koji KAWAGUCHI ◽  
Katsuyuki SUZUYAMA ◽  
Masaru YAMASHIRO ◽  
Mitsuyoshi KODAMA
Keyword(s):  
Energy Transfer ◽  
Wave Model ◽  
Accuracy Improvement ◽  
Nonlinear Energy Transfer ◽  
Nonlinear Energy

scholarly journals Emergence of non-stationary regimes in one- and two-dimensional models with internal rotators

2018 ◽  
Vol 376 (2127) ◽  
pp. 20170134 ◽  
Author(s):  
K. Vorotnikov ◽  
M. Kovaleva ◽  
Y. Starosvetsky
Keyword(s):  
Energy Transfer ◽  
Harmonic Excitation ◽  
Two Dimensional ◽  
Theme Issue ◽  
One Dimensional ◽  
Lateral Vibrations ◽  
Nonlinear Energy Transfer ◽  
Energy Exchanges ◽  
Dimensional Models ◽  
Nonlinear Energy

In the present paper, we give a selective review of some very recent works concerning the non-stationary regimes emerging in various one- and two-dimensional models incorporating internal rotators. In one-dimensional models, these regimes are characterized by the intense energy transfer from the outer element, subjected to initial or harmonic excitation, to the internal rotator. As for the two-dimensional models (incorporating internal rotators), we will mainly focus on the two special dynamical states, namely a state of the near-complete energy transfer from longitudinal to lateral vibrations of the outer element as well as the state of a permanent, unidirectional energy locking with mild, spatial energy exchanges. In this review, we will discuss the recent theoretical and experimental advancements in the study of essentially nonlinear mechanisms governing the formation and bifurcations of the regimes of intense energy transfer. The present review is composed of two parts. The first part will be mainly devoted to the emergence of resonant energy transfer states in one-dimensional models incorporating internal rotators, while the second part will be mainly concerned with the manifestation of various energy transfer states in two-dimensional ones. This article is part of the theme issue ‘Nonlinear energy transfer in dynamical and acoustical systems’.

Frequency Analysis of Nonlinear Energy Transfer

2001 ◽  
Author(s):  
L. Palatella ◽  
A. Di Lieto ◽  
P. Minguzzi ◽  
A. Toncelli ◽  
M. Tonelli
Keyword(s):  
Energy Transfer ◽  
Frequency Analysis ◽  
Nonlinear Energy Transfer ◽  
Nonlinear Energy
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