Evaluation of a film-based wall shear stress measurement technique in a turbulent channel flow

Omid Amili, Michael D. Hind, Jonathan W. Naughton, Julio Soria

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Mean wall shear stress in a turbulent channel flow has been measured using a film-based shear stress sensor with a working principle based on the deformation of a thin elastic film. A direct comparison was made between the elastic film measurements and those using oil-film interferometry in the same experimental facility to evaluate the capability of the novel technique to measure the mean wall shear stress. The results indicate that the film-based sensor measures the wall shear stress within the uncertainty of the oil film measurement for the range of Reynolds numbers considered here, i.e. 2100-2900 based on the friction velocity and the half channel height.

Original languageEnglish (US)
Pages (from-to)437-442
Number of pages6
JournalExperimental Thermal and Fluid Science
Volume70
DOIs
StatePublished - Jan 1 2016

Keywords

  • Film-based shear stress sensor
  • Mean wall shear stress
  • Oil-film interferometry
  • Turbulent channel flow

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