Nonlinearity in the resolvent analysis: recovery of the mean velocity profile and energy transfer paths in wall turbulence
Technical Report,01 Sep 2016,31 Aug 2019
California Institute of Technology Pasadena United States
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The present research extended resolvent analysis in canonical turbulent flows to analysis of the nonlinear forcing term. Fullcharacterization of the nonlinear forcing is equivalent to making the formulation self-consistent and self-sustaining. The workprovided a rigorous, non-empirical framework to reconstruct the mean velocity profile from an assembly of correctly-weightedresolvent modes, determined weights for individual triadic interactions, and used these results to give new insight forturbulence models. The study included analysis, modeling, experimental excitation of individual triadic interactions usingdynamic roughness and investigation of controlled flow.
- Fluid Mechanics