The Experts below are selected from a list of 3852 Experts worldwide ranked by ideXlab platform

John R. Chaplin - One of the best experts on this subject based on the ideXlab platform.

  • Developments of Stream-Function wave Theory
    Coastal Engineering, 2003
    Co-Authors: John R. Chaplin
    Abstract:

    Recent work on the problem of the periodic wave of permanent form has revealed some unexpected characteristics which are not predicted by any of the wave theories in engineering use. Of these, the Stream-Function wave Theory is the most accurate, and it is shown in this paper by means of a reformulated method of application to be capable of predicting correctly the behaviour of steep and near-breaking waves. Errors in Stream-Function wave-Theory tables are assessed and found to be particularly significant for very steep waves, when crest particle velocities are under-estimated by 25% or more. As a development of the modified method of application, an approximate Stream-Function wave Theory is presented. It permits a solution to be obtained for given wave conditions in any depth of water but requires much more modest computer resources than the full Stream-Function Theory.

K J Bai - One of the best experts on this subject based on the ideXlab platform.

  • linear and nonlinear wave models based on hamilton s principle and Stream Function Theory cmse and ign
    Journal of Offshore Mechanics and Arctic Engineering-transactions of The Asme, 2010
    Co-Authors: J W Kim, R C Ertekin, K J Bai
    Abstract:

    Recently, two wave models based on the Stream-Function Theory have been derived from Hamilton’s principle for gravity waves. One is the irrotational Green–Naghdi (IGN) equation and the other is the complementary mild-slope equation (CMSE). The IGN equation has been derived to describe refraction and diffraction of nonlinear gravity waves in the time domain and in water of finite but arbitrary bathymetry. The CMSE has been derived to consider the same problem in the (linear) frequency domain. In this paper, we first discuss the two models from the viewpoint of Hamilton’s principle. Then the two models are applied to a resonant scattering of Stokes waves over periodic undulations, or the Bragg scattering problem. The numerical results are compared with existing numerical predictions and experimental data. It is found here that Level 3 IGN equation can describe Bragg scattering well for arbitrary bathymetry.

  • linear and non linear wave models based on hamilton s principle and Stream Function Theory cmse and ign
    Volume 5: Ocean Space Utilization; Polar and Arctic Sciences and Technology; The Robert Dean Symposium on Coastal and Ocean Engineering; Special Sympo, 2007
    Co-Authors: J W Kim, R C Ertekin, K J Bai
    Abstract:

    Recently, two wave models based on the Stream-Function Theory have been derived from Hamilton’s principle for gravity waves. One is the Irrotational Green-Naghdi (IGN) equation and the other is the Complementary Mild-Slope Equation (CMSE). The IGN equation has been derived to describe refraction and diffraction of nonlinear gravity waves in the time domain and in water of finite but arbitrary bathymetry. The CMSE has been derived to consider the same problem in the (linear) frequency domain. In this paper, we first describe the discuss the two models from the viewpoint of Hamilton’s principle. Then the two models are applied to a resonant scattering of Stokes waves over periodic undulations, or the Bragg scattering problem. The numerical results are compared with existing numerical predictions and experimental data. It is found here that Level 3 IGN equation can describe Bragg scattering well for arbitrary bathymetry.Copyright © 2007 by ASME

Felicien Bonnefoy - One of the best experts on this subject based on the ideXlab platform.

  • cn Stream open source library for nonlinear regular waves using Stream Function Theory
    arXiv: Fluid Dynamics, 2019
    Co-Authors: Guillaume Ducrozet, Benjamin Bouscasse, Maite Gouin, Pierre Ferrant, Felicien Bonnefoy
    Abstract:

    CN-Stream is a library for the computation of nonlinear regular ocean waves. The library is developed in order to be easily integrated with wave generation models in CFD solvers. It is based on the Stream Function Theory and provides significant improvements regarding the applicability of the method for waves close to breaking (in deep or shallow water) compared to the classical implementation of Rienecker and Fenton [26]. The complete description of the wave field is available, including the free-surface evolution and the wave kinematics in the fluid domain. It is released as open-source, developed and distributed under the terms of GPL v3.

Bonnefoy Félicien - One of the best experts on this subject based on the ideXlab platform.

  • CN-Stream: Open-source library for nonlinear regular waves using Stream Function Theory
    2019
    Co-Authors: Ducrozet Guillaume, Bouscasse Benjamin, Gouin Maïté, Ferrant Pierre, Bonnefoy Félicien
    Abstract:

    CN-Stream is a library for the computation of nonlinear regular ocean waves. The library is developed in order to be easily integrated with wave generation models in CFD solvers. It is based on the Stream Function Theory and provides significant improvements regarding the applicability of the method for waves close to breaking (in deep or shallow water) compared to the classical implementation of Rienecker and Fenton [26]. The complete description of the wave field is available, including the free-surface evolution and the wave kinematics in the fluid domain. It is released as open-source, developed and distributed under the terms of GPL v3.Comment: 31 pages, 18 figures ; submitted to Computer Physics Communication

J W Kim - One of the best experts on this subject based on the ideXlab platform.

  • linear and nonlinear wave models based on hamilton s principle and Stream Function Theory cmse and ign
    Journal of Offshore Mechanics and Arctic Engineering-transactions of The Asme, 2010
    Co-Authors: J W Kim, R C Ertekin, K J Bai
    Abstract:

    Recently, two wave models based on the Stream-Function Theory have been derived from Hamilton’s principle for gravity waves. One is the irrotational Green–Naghdi (IGN) equation and the other is the complementary mild-slope equation (CMSE). The IGN equation has been derived to describe refraction and diffraction of nonlinear gravity waves in the time domain and in water of finite but arbitrary bathymetry. The CMSE has been derived to consider the same problem in the (linear) frequency domain. In this paper, we first discuss the two models from the viewpoint of Hamilton’s principle. Then the two models are applied to a resonant scattering of Stokes waves over periodic undulations, or the Bragg scattering problem. The numerical results are compared with existing numerical predictions and experimental data. It is found here that Level 3 IGN equation can describe Bragg scattering well for arbitrary bathymetry.

  • linear and non linear wave models based on hamilton s principle and Stream Function Theory cmse and ign
    Volume 5: Ocean Space Utilization; Polar and Arctic Sciences and Technology; The Robert Dean Symposium on Coastal and Ocean Engineering; Special Sympo, 2007
    Co-Authors: J W Kim, R C Ertekin, K J Bai
    Abstract:

    Recently, two wave models based on the Stream-Function Theory have been derived from Hamilton’s principle for gravity waves. One is the Irrotational Green-Naghdi (IGN) equation and the other is the Complementary Mild-Slope Equation (CMSE). The IGN equation has been derived to describe refraction and diffraction of nonlinear gravity waves in the time domain and in water of finite but arbitrary bathymetry. The CMSE has been derived to consider the same problem in the (linear) frequency domain. In this paper, we first describe the discuss the two models from the viewpoint of Hamilton’s principle. Then the two models are applied to a resonant scattering of Stokes waves over periodic undulations, or the Bragg scattering problem. The numerical results are compared with existing numerical predictions and experimental data. It is found here that Level 3 IGN equation can describe Bragg scattering well for arbitrary bathymetry.Copyright © 2007 by ASME