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Mean Momentum Balance Structure in Moderately Adverse Pressure Gradient Turbulent Boundary Layers

  • Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The mean momentum balance (MMB) is investigated in a turbulent boundary layer (TBL) at large Reynolds number (7000 ≾ δ+ ≾ 11000). The boundary layer is under modest adverse pressure gradient (APG) conditions, where the Clauser pressure-gradient parameter β ≤ 1.8. Changes in the MMB viscous force (gradient of the viscous stress µ dU/dy) and turbulent inertia (gradient of the Reynolds shear stess uv) are investigated relative to the statistical quantities uv and U as the flow relaxes from an APG TBL to a ZPG TBL with downstream development. Well-resolved hot-wire measurements are obtained at the Flow Physics Facility at the University of New Hampshire in the region of an APG ramp and downstream of the ramp to observe this relaxation. Initial observations reveal a decoupling of inner and outer regions in the flow along the APG ramp. Comparisons are made with ZPG TBL experimental data at similar Reynolds number.

Original languageEnglish
Title of host publication22nd Australasian Fluid Mechanics Conference, AFMC 2020
EditorsHubert Chanson, Richard Brown
PublisherAustralasian Fluid Mechanics Society
ISBN (Electronic)9781742723419
DOIs
StatePublished - 2020
Event22nd Australasian Fluid Mechanics Conference, AFMC 2020 - Brisbane, Australia
Duration: Dec 7 2020Dec 10 2020

Publication series

Name22nd Australasian Fluid Mechanics Conference, AFMC 2020

Conference

Conference22nd Australasian Fluid Mechanics Conference, AFMC 2020
Country/TerritoryAustralia
CityBrisbane
Period12/7/2012/10/20

Keywords

  • adverse pressure gradient
  • hot-wire
  • turbulent boundary layer

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