Depth-integrated equation for hydro-acoustic waves with bottom damping

被引：29

作者：

Abdolali, Ali ^{[1
,2
]}

Kirby, James T. ^{[1
]}

Bellotti, Giorgio ^{[2
]}

机构：

[1] Univ Delaware, Ctr Appl Coastal Res, Dept Civil & Environm Engn, Newark, DE 19716 USA

[2] Roma Tre Univ, Dept Engn, I-00146 Rome, Italy

来源：

JOURNAL OF FLUID MECHANICS | 2015年 / 766卷

关键词：

compressible flows; porous media; surface gravity waves; OKI TSUNAMI SOURCE; COMPRESSIBLE-OCEAN; TIME;

D O I：

10.1017/jfm.2015.37

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We present a depth-integrated equation for the mechanics of generation, propagation and dissipation of low-frequency hydro-acoustic waves due to sudden bottom displacement in a weakly compressible ocean overlying a weakly compressible viscous sediment layer. The model is validated against a full 3D computational model. Physical properties of these waves are studied and compared with those for waves over a rigid sea bed, revealing changes in the frequency spectrum and modal peaks. The resulting model equation can be used for numerical prediction in large-scale domains, overcoming the computational difficulties of 3D models while taking into account the role of bottom dissipation on hydro-acoustic wave generation and propagation.

引用

页码：R11 / R113

页数：13

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