Nonlinear Theory for Coalescing Characteristics in Multiphase Whitham Modulation Theory
Nonlinear Theory for Coalescing Characteristics in Multiphase Whitham Modulation Theory
复制标题
多相惠瑟姆调制理论中聚结特性的非线性理论
DOI:
10.1007/s00332-020-09669-y
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发表时间:
2020
影响因子:
3
通讯作者:
Bridges T
中科院分区:
文献类型:
--
作者:
Bridges T
The multiphase Whitham modulation equations withNphases have 2Ncharacteristics which may be of hyperbolic or elliptic type. In this paper, a nonlinear theory is developed for coalescence, where two characteristics change from hyperbolic to elliptic via collision. Firstly, a linear theory develops the structure of colliding characteristics involving the topological sign of characteristics and multiple Jordan chains, and secondly, a nonlinear modulation theory is developed for transitions. The nonlinear theory shows that coalescing characteristics morph the Whitham equations into an asymptotically valid geometric form of the two-way Boussinesq equation, that is, coalescing characteristics generate dispersion, nonlinearity and complex wave fields. For illustration, the theory is applied to coalescing characteristics associated with the modulation of two-phase travelling wave solutions of coupled nonlinear Schrödinger equations, highlighting how collisions can be identified and the relevant dispersive dynamics constructed.
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DOI:
10.1098/rspa.2018.0784
发表时间:
2018
期刊:
Proceedings of the Royal Society A
影响因子:
--
作者:
Daniel J. Ratliff
通讯作者:
Daniel J. Ratliff
影响因子:
1.7
作者:
D. Ratliff;T. Bridges
通讯作者:
D. Ratliff;T. Bridges
DOI:
10.1098/rspa.2016.0533
发表时间:
2016-07
期刊:
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子:
--
作者:
M. Maiden;M. Hoefer
通讯作者:
M. Maiden;M. Hoefer
DOI:
10.1016/j.physd.2009.01.003
发表时间:
2008-03
期刊:
Physica D: Nonlinear Phenomena
影响因子:
--
作者:
H. Salman;N. Berloff
通讯作者:
H. Salman;N. Berloff
影响因子:
2.7
作者:
M. Ablowitz;D. J. Benney
通讯作者:
M. Ablowitz;D. J. Benney