Some transient studies in stratified flow with horizontal shear

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• Cristobal Arratia, LadHyX, Ecole Polytechnique, Palaiseau
• Thursday 25 September 2008, 10:45-11:45
• Open Plan Area, BP Institute, Madingley Rise CB3 0EZ.

If you have a question about this talk, please contact Dr C. P. Caulfield.

We study the linear transient growth of optimal perturbations in a horizontally dependent mixing layer-type velocity profile with vertical stratification. Early results show that the perturbations that optimally amplify energy present the biggest amplification for 2D perturbations, which is in agreement with modal theory. However, some characteristics of these perturbations (i.e. enstrophy) are more amplified for 3D perturbations with a certain vertical wavelength. This might be of interest in relation with the spontaneous layering observed in many stratified flows that are initially uniform in the vertical direction.

This talk is part of the Institute for Energy and Environmental Flows (IEEF) series.

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