Accession Number:

AD1096815

Title:

Nonlinearity in the resolvent analysis: recovery of the mean velocity profile and energy transfer paths in wall turbulence

Descriptive Note:

Technical Report,01 Sep 2016,31 Aug 2019

Corporate Author:

California Institute of Technology Pasadena United States

Personal Author(s):

Report Date:

2019-11-19

Pagination or Media Count:

29.0

Abstract:

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.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE