Laboratoire de Mécanique des Fluides et d'Acoustique - UMR 5509

LMFA - UMR 5509
Laboratoire de Mécanique des Fluides et d’Acoustique
Lyon
France


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Accueil > Équipes > Turbulence & Instabilités > Séminaires informels > Séminaires passés > Séminaires 2019

Bruno Saint Denis

Observations and simulations of internal solitary wavetrains generated by frontally forced intrusions

Lundi 15 avril 2019, 13h15, ECL, salle de réunion I11 bas.

Observations and simulations of internal solitary wavetrains generated by frontally forced intrusions

The intrusion resulting from a frontal collision of two stratified water masses has been described in the last few years as a potential source of generation of internal solitary wavetrains (ISW). Nonetheless, only a hand-ful of natural observations have been reported such that the relationships between the properties of the generated ISW (wavelength, amplitude, energy), and the background and forcing conditions (surface layer thickness, shearing, Richardson and Froude number) are misunderstood. To assess this issue, idealized numerical simulations are carried out using a 2D nonlinear
and nonhydrostatic model. The objective is to determine empirical relationships between ISW properties and the control condition by exploring the wide parameter space involved in this mechanism. Here we report the results of these numerical simulations and few observations collected during the last two summers in the Saguenay fjord (Quebec Canada).

Bruno St Denis is a Master student with Daniel Bourgault, ISMER, visiting LMFA after his participation to the EGU annual meeting in Vienna.

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