Transition to Turbulence in a Separated Boundary Layer with Spanwise Perturbations

Ayse G. Gungor*, Mark P. Simens

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

The influence of spanwise perturbations on the transition to turbulence of a strong adverse pressure gradient (APG), laminar separated boundary layer is studied by direct numerical simulation using a high resolution numerical scheme. The perturbations are generated by positioning a discrete roughness element with a sinusoidally varying height in the spanwise direction, close to the inflow. Results indicate that the dynamics of the transition to turbulence mechanism are altered significantly due to the accelerated flow in the openings in the roughness element and the subsequent 3D instability.

Original languageEnglish
Pages (from-to)69-77
Number of pages9
JournalProcedia IUTAM
Volume14
DOIs
Publication statusPublished - 2015
Event8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014 - Rio de Janeiro, Brazil
Duration: 8 Sept 201412 Sept 2014

Bibliographical note

Publisher Copyright:
© 2015 The Authors.

Keywords

  • direct numerical simulation
  • instability
  • roughness
  • separated flow
  • transition to turbulence

Fingerprint

Dive into the research topics of 'Transition to Turbulence in a Separated Boundary Layer with Spanwise Perturbations'. Together they form a unique fingerprint.

Cite this