@inbook{43ac622db54241f49ef21e8149783e4f,

title = "Vortex tubes in shear-stratified turbulent flows",

abstract = "Coherent vortex extraction using wavelets is applied to a shear-stratified turbulent flow computed by Direct Numerical Simulations (DNS) to compute the atmospheric jet stream at the tropopause. The basic state is characterised by a jet centred at the tropopause and stable density stratification profile with increased stratification above the tropopause. Quasi-equilibrium turbulent flow-fields are obtained after long-time integration of the governing equations written in primitive variables using adaptive spectral domain decomposition method. The coherent vortex tubes are extracted from the vorticity and potential vorticity fields, using a nonlinear filtering in wavelet space. It is finally checked that the coherent vortex tubes exhibit the same dynamics as the total flow and therefore drive the residual background flow.",

author = "Marie Farge and Alexandre Azzalini and Alex Mahalov and Basil Nicolaenko and Frank Tse and Giulio Pellegrino and Kai Schneider",

year = "2004",

doi = "10.1007/0-306-48420-x_29",

language = "English (US)",

isbn = "1402009801",

series = "Fluid Mechanics and its Applications",

publisher = "Kluwer Academic Publishers",

pages = "217--228",

booktitle = "Tubes, Sheets and Singularities in Fluid Dynamics",

}