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Local stability analysis of swirling shear flows

Dhiren Mistry (Energy)


I implemented a local linear stability analysis to examine a range of swirling shear flows. The aims of this project are to better understand the origins of vortex breakdown and to evaluate the limitations of local linear stability analysis. Absolute and convective instabilities present further insight into the instability characteristics of a flow not easily available from global stability analysis. However, I also show that the accuracy of local stability analysis is limited when applied to quickly evolving flows by drawing comparisons with results from the global analysis.