首页> 外文OA文献 >Focusing of unidirectional wave groups on deep water: an approximate nonlinear Schrodinger equation-based model
【2h】

Focusing of unidirectional wave groups on deep water: an approximate nonlinear Schrodinger equation-based model

机译:在深水中聚焦单向波群:基于非线性薛定inger方程的近似模型

摘要

This paper sets out an approximate analytical model describing the nonlinear evolution of a Gaussian wave group in deep water. The model is derived using the conserved quantities of the cubic nonlinear Schrödinger equation (NLSE). The key parameter for describing the evolution is the amplitude-to-wavenumber bandwidth ratio, a quantity analogous to the Benjamin-Feir index for random sea-states. For smaller values of this parameter, the group is wholly dispersive, whereas for more nonlinear cases, solitons are formed. Our model predicts the characteristics and the evolution of the groups in both regimes. These predictions are found to be in good agreement with numerical simulations using the NLSE and are in qualitative agreement with numerical results from a fully nonlinear potential flow solver and experimental results. This journal is © 2009 The Royal Society.
机译:本文建立了一个近似分析模型,描述了深水中高斯波群的非线性演化。该模型是使用立方非线性Schrödinger方程(NLSE)的守恒量导出的。描述演化的关键参数是振幅与波数带宽之比,该数量类似于随机海状态的本杰明·费尔指数。对于此参数的较小值,该组是完全分散的,而对于更多非线性情况,则形成孤子。我们的模型预测了两种制度下各群体的特征和演变。这些预测与使用NLSE进行的数值模拟非常吻合,并且与完全非线性的势流求解器的数值结果和实验结果在质量上吻合。该期刊为©2009 The Royal Society。

著录项

  • 作者

    Adcock TAA; Taylor PH;

  • 作者单位
  • 年度 2009
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号