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Resolvent analysis of turbulent flows

Event Type: 
Date and Time: 
Friday, July 29, 2022 - 14:00 to 15:30
Bishop Auditorium (1st Floor) 518 Memorial Way Stanford, CA 94305
Event Sponsor: 
Parviz Moin, Director of Center for Turbulence Research
Beverley McKeon

The resolvent framework provides a simple, but rigorous, approach by which to analyze linear amplification in turbulent flows and frame nonlinear turbulent closures. Analysis of the resolvent identifies the linear amplification associated with harmonic forcing of the linearized Navier-Stokes equations, which give rise to a non-normal operator.  By associating this forcing with the quadratic nonlinearity, the full turbulence field can be expressed as a linear combination of weighted, nonlinearly interacting modes. After a brief review of the basic approach, recent developments and the connection to data-driven techniques, some examples of the use of resolvent analysis for discovery and modeling will be presented.

Presentation: Video