Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Fluid Dynamics
Volume 55, Number 16
Sunday–Tuesday, November 21–23, 2010; Long Beach, California
Session LG: GFD: Oceanography III
3:35 PM–5:32 PM,
Monday, November 22, 2010
Long Beach Convention Center Room: 103B
Chair: Darek Bogucki, Texas A&M Corpus Christi
Abstract ID: BAPS.2010.DFD.LG.9
Abstract: LG.00009 : Numerical Simulations of an Asymptotically Reduced Model of Anisotropic Langmuir Turbulence*
5:19 PM–5:32 PM
Preview Abstract Abstract
``Langmuir turbulence'' is a wind and surface-wave driven flow that is thought to dominate vertical transport and mixing in the ocean surface boundary layer. The characteristic occurrence of quasi-coherent counter-rotating vortical structures elongated in the wind direction renders Langmuir turbulence strongly anisotropic. Recently, an asymptotically exact reduced model of this flow was derived using multiscale analysis (Chini, Julien \& Knobloch, GAFD 2009). The reduced PDEs go beyond strictly 2D (downwind invariant) formulations of the governing Craik--Leibovich (CL) equations by consistently incorporating the dominant 3D physical processes while continuing to average or filter certain fast, fine downwind-scale flow features. Here, pseudospectral numerical simulations of the reduced PDEs are performed to explore the dynamics and bifurcation structure of the reduced model.
*Funding from NSF CAREER Award 0348981 is gratefully acknowledged.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DFD.LG.9
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