Linear analysis to understand the formation of coherent structures in wall turbulence

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• Vikrant Gupta, CUED
• Friday 14 February 2014, 13:00-14:00
• LR3B, Inglis Building, CUED..

If you have a question about this talk, please contact Dr Henry Burridge.

High Reynolds number flows are common in industrial applications as well as in daily life. These flows are characterized by stochastic perturbations, and need a constant source of energy to sustain themselves. I use low order models to understand the formation of coherent structures in wall-bounded flows. I will mainly discuss two canonical flow cases: turbulent channel flow and rotating pipe flow. Firstly, I will show why near-wall streaks, though turbulent, always have spanwise spacing of 100 wall units. Secondly, I will discuss the formation of large and very large scale motions in wall turbulence. Thirdly, I will discuss how rotation in pipe causes drag reduction. Fourthly, I will discuss improving the low order models by using turbulence models.

This talk is part of the Fluid Mechanics (CUED) series.

This talk is included in these lists:

• Acoustics Lab Seminars
• Engineering Department Acoustics/Combustion Student seminars
• Fluid Mechanics (CUED)
• LR3B, Inglis Building, CUED.

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