Lagrangian Coherent Structures in Urban Flows

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• Wengbo Tang, ASU
• Thursday 04 November 2010, 11:30-12:30
• Open Plan Area, BP Institute.

If you have a question about this talk, please contact Catherine Pearson.

Accurate extraction of flow coherent structures is important for studies on transport and mixing processes in urban flows. Recent research show that Lagrangian Coherent Structures (LCS) form the template of fluid stirring and is an objective tool to characterize unstable motion in nonlinear velocity fields. In this talk, I’ll discuss how LCS can be used to evaluate urban transport processes. In particular, I will show a recent study of real-time remote-sensing data from Hong Kong International Airport. Our study shows that LCS is capable of revealing air disturbances that are dangerous to aircraft operations during take-offs and landings. This allows possible developments of more accurate turbulence indices based on Lagrangian measures.

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