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Accueil du site > Évènements > Séminaires > Séminaires IRPHE > Archives IRPHE > 2018

Vendredi 2 Mars 2018 / IRPHE

publié le

Séminaire régulier IRPHE

On the interaction of an internal wavepacket with its induced mean flow and the role of streaming

Orateur : Triantaphyllos Akylas
MIT, Boston, USA

Abstract : We consider three-dimensional gravity—inertia internal wavepackets in the form of beams with nearly monochromatic profile and discuss the coupled nonlinear interaction with their induced mean flow. This mean flow comprises : (i) an inviscid, purely modulation-induced component ; and (ii) streaming, associated with the production of mean potential vorticity via the combined action of dissipation and nonlinearity. The latter can have a profound effect on the beam profile by causing cross-beam refraction, transverse broadening and increased along-beam decay, in qualitative agreement with laboratory experiments (Bordes 2012).

Date et lieu  : le Vendredi 2 mars 2018 à 11h00, salle de séminaires IRPHE

Voir en ligne : la page personnelle de l’orateur