|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Radiative instability of stratified shear flows
If you have a question about this talk, please contact Dr C. P. Caulfield.
In this talk, I analyse how the stability of a shear flow is modified when placed in a stably stratified fluid. I first show that stratification is stabilizing only if the directions of shear and stratification are aligned. When shear and stratification are not aligned, I demonstrate that an additional inviscid instability associated with the emission of internal gravity waves can take place. This radiative instability is analysed in details for models of boundary layer flows, plane jets and rotating flows. Both the mechanism of instability and explicit formulas for the characteristics of the instability are provided. Experimental results are also obtained for two types of rotating flows (a Gaussian vortex and the flow around a rotating cylinder when the rotation axis is aligned along with the direction of stratification). Finally, the results are discussed in the context of atmospheric flows and of astrophysical flows (accretion disks).
This talk is part of the Fluid Mechanics (DAMTP) series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsFuture of Sustainable Development in South Asia God or multiverse? Gypsy Roma Traveller (GRT) History Month
Other talksTBC The Development of Galaxies ‘Spaghetti sandwich’ micro-structure of very high Reynolds number turbulence - not quite Kolmogorov Fantastical pottery creatures by Andrew Hull The 2015 Ageing Summit The role of macrophages in tumour progression and metastasis