The impacts of scale resolutions on the turbulent flow over a rough backward-facing step

Yanhua Wu, Huiying Ren, Hui Tang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

PIV measurements are performed in the streamwise-wall-normal planes in turbulent flows over a rough backward-facing step (BFS) and two of the step's coarse-scale approximations. The roughness topography is replicated from real turbine blades and its coarse-scale representations are obtained from a multi-resolution analysis using discrete wavelet transform. The experiments are conducted at Reh=3450 and δ=h=8, where h is the mean step height and δ is the incoming boundary layer thickness. The impacts of the roughness scale resolutions on the BFS turbulent flows are investigated by examining the mean flow structures and the turbulence kinetic energy ({u′2 +v′2}) distributions.
Original languageEnglish
Title of host publicationProceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012
PublisherAustralasian Fluid Mechanics Society
ISBN (Electronic)9780646583730
Publication statusPublished - 1 Jan 2012
Externally publishedYes
Event18th Australasian Fluid Mechanics Conference, AFMC 2012 - Launceston, Australia
Duration: 3 Dec 20127 Dec 2012

Conference

Conference18th Australasian Fluid Mechanics Conference, AFMC 2012
Country/TerritoryAustralia
CityLaunceston
Period3/12/127/12/12

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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