Pod study of a turbulent boundary layer over a rough forward-facing step

Yanhua Wu, Hui Tang

Research output: Chapter in book / Conference proceedingChapter in an edited book (as author)Academic researchpeer-review

1 Citation (Scopus)


Large-scale fluctuating flow structures are studied using snapshot proper orthogonal decomposition (POD) in a turbulent boundary layer over a realistic rough forward-facing step (FFS) at Reh = 3,450 and d/h = 8. It was observed that large-scale Q2 event induced by hairpin vortex packet and largescale Q4 event are the dominant fluctuating flow structures that contribute significantly to the first POD mode for both smooth and rough steps. However, the flow structures close to the rough surface were affected differently by different roughness topographies.
Original languageEnglish
Title of host publicationLecture Notes in Mechanical Engineering
Number of pages6
Publication statusPublished - 1 Jan 2014
Externally publishedYes

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364


  • Forward-facing step flow
  • Proper orthogonal decomposition
  • Turbulence structures
  • Turbulent boundary layer

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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