Modeling momentum and scalar transport in a wall-bounded turbulent flow

Theresa Saxton-Fox, Beverley McKeon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A mildly-heated turbulent boundary layer was studied to characterize the relationship between velocity structures and the scalar field. Particle image velocimetry (PIV) and a Malley probe (Malley et al., 1992) were used to simultaneously measure the velocity field and the streamwise gradients of the scalar field (Gordeyev et al., 2014) respectively. Two distinct velocity scales were identified to be correlated to scalar mixing by conditionally averaging the velocity field on the existence of a scalar gradient. Resolvent analysis was used to create simple models of these velocity scales (McKeon &Sharma, 2010) and to probe their interaction. Using a combination of structural conditional averaging and conditional averaging on the scalar gradient, significant interaction was observed between the two scales of interest, with behavior consistent with the general scale interaction described by amplitude modulation (Hutchins &Marusic, 2007). The study constructed a model of the velocity field that was correlated to streamwise scalar gradients in the outer boundary layer.

Original languageEnglish (US)
Title of host publication10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
PublisherInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP10
ISBN (Electronic)9780000000002
StatePublished - Jan 1 2017
Externally publishedYes
Event10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017 - Chicago, United States
Duration: Jul 6 2017Jul 9 2017

Publication series

Name10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
Volume2

Other

Other10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
CountryUnited States
CityChicago
Period7/6/177/9/17

ASJC Scopus subject areas

  • Atmospheric Science
  • Aerospace Engineering

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  • Cite this

    Saxton-Fox, T., & McKeon, B. (2017). Modeling momentum and scalar transport in a wall-bounded turbulent flow. In 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017 (10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017; Vol. 2). International Symposium on Turbulence and Shear Flow Phenomena, TSFP10.