HAL : hal-00113909, version 2

DOI : 10.1007/s00162-007-0047-0

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Theor. Comput. Fluid Dyn. 21, 4 (2007) 245-269

Versions disponibles :

v1 (15-11-2006)

v2 (17-02-2007)

Comparison between three-dimensional linear and nonlinear tsunami generation models

Youen Kervella 1, Denys Dutykh 2, Frédéric Dias 2

(13/04/2007)

The modeling of tsunami generation is an essential phase in understanding tsunamis. For tsunamis generated by underwater earthquakes, it involves the modeling of the sea bottom motion as well as the resulting motion of the water above it. A comparison between various models for three-dimensional water motion, ranging from linear theory to fully nonlinear theory, is performed. It is found that for most events the linear theory is sufficient. However, in some cases, more sophisticated theories are needed. Moreover, it is shown that the passive approach in which the seafloor deformation is simply translated to the ocean surface is not always equivalent to the active approach in which the bottom motion is taken into account, even if the deformation is supposed to be instantaneous.

1 :	Laboratoire DYNECO/PHYSED
	Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
2 :	Centre de Mathématiques et de Leurs Applications (CMLA)
	CNRS : UMR8536 – École normale supérieure de Cachan - ENS Cachan

Domaine

:

Physique/Mécanique/Mécanique des fluides Sciences de l'ingénieur/Mécanique/Mécanique des fluides Physique/Physique/Dynamique des Fluides Physique/Physique/Physique Atmosphérique et Océanique

Mots Clés : tsunami – wave generation – water waves – nonlinear shallow water equations – Cauchy-Poisson problem

hal-00113909, version 2

http://hal.archives-ouvertes.fr/hal-00113909

oai:hal.archives-ouvertes.fr:hal-00113909

Contributeur : Denys Dutykh <>

Soumis le : Samedi 17 Février 2007, 18:12:47

Dernière modification le : Lundi 21 Novembre 2011, 21:17:58