Comportement linéaire et non linéaire d'un modèle de Boussinesq étendu

Comportement linéaire et non linéaire d'un modèle de Boussinesq étendu
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Boussinesq étendu 模式的直线和非直线行为

DOI:
10.1080/17747120.2005.9692794
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
Khouane Meftah
Khouane Meftah
中科院分区:
--
文献类型:
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作者:
Patrick Gomi;P. Sergent;Khouane Meftah

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摘要:本文提出了一种新型的扩展Boussinesq模型,该模型利用一种数学技巧将速度的每个垂直分量分解为一系列关于水深的函数。这种数学技巧可以通过增加其有效频率范围来改善其线性色散行为,也可以提高其再现垂直速度剖面和处理线性浅滩和陡坡的能力。本文的目的是提出该有限元模型的理论基础,并研究其非线性的二阶和三阶行为及其处理线性浅滩的能力。
ABSTRACT A new type of extended Boussinesq model has been developed using a mathematical artifice that decomposes each vertical component of velocity on a series of functions on the water depth. This mathematical artifice enables to improve its linear dispersion behaviour by increasing its frequencial range of validity and also to improve its ability to reproduce vertical velocity profile and to deal with linear shoaling and steep slopes. The aim of this paper is to present the theoretical bases of this finite elements model and also to study its non-linear 2nd and 3rd order behaviour and its ability to deal with linear shoaling.