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arXiv 2209.09718physics.flu-dynnlin.SI
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Whitham-Boussinesq系统的孤波碰撞

Solitary wave collisions for Whitham-Boussinesq systems

Marcelo V. Flamarion, Rosa M. Vargas-Magaña

摘要:

本文研究了两个Whitham-Boussinesq型模型的孤子型数值解。孤立波的计算采用迭代牛顿型和高精度的延拓方法。该方法允许我们计算孤立波与大振幅和速度接近奇异极限。这些孤立波被设置为初始数据和超车碰撞被认为是两个系统。我们证明了这两个系统都满足两孤子碰撞的几何Lax范畴。数值结果表明,其中一个系统也承认一个代数拉克斯分类的基础上的初始孤立波振幅与不同的范围从拉克斯预测的比率。然而,我们表明,这种分类是不可能的第二个系统。

英文摘要:

This work concerns soliton-type numerical solutions for two Whitham-Boussinesq-type models. Solitary waves are computed using an iterative Newton-type and continuation methods with high accuracy. The method allow us to compute solitary waves with large amplitude and speed close to the singular limit. These solitary waves are set as initial data and overtaking collisions are considered for both systems. We show that both system satisfy the geometric Lax-categorization of two-soliton collision. Numerical evidences indicate that one of the systems also admits an algebraic Lax-categorization based on the ratio of the initial solitary wave amplitudes with a different range from the one predicted by Lax. However, we show that such categorization is not possible for the second system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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