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.

Abdolali, A., Kirby, J.T., Bellotti, G. (2015). Depth-integrated equation for hydro-acoustic waves with bottom damping. JOURNAL OF FLUID MECHANICS, 766(R1), R11-R113 [10.1017/jfm.2015.37].

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

ABDOLALI, ALI;BELLOTTI, GIORGIO
2015-01-01

Abstract

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.
2015
Abdolali, A., Kirby, J.T., Bellotti, G. (2015). Depth-integrated equation for hydro-acoustic waves with bottom damping. JOURNAL OF FLUID MECHANICS, 766(R1), R11-R113 [10.1017/jfm.2015.37].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/299892
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