Transition to Turbulence in a Separated Boundary Layer with Spanwise Perturbations

Ayse G. Gungor; Mark P. Simens

doi:10.1016/j.piutam.2015.03.025

Transition to Turbulence in a Separated Boundary Layer with Spanwise Perturbations

Ayse G. Gungor^*
, Mark P. Simens

^*Corresponding author for this work

Department of Astronautical Engineering

Technical University of Madrid

Research output: Contribution to journal › Conference article › peer-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 language	English
Pages (from-to)	69-77
Number of pages	9
Journal	Procedia IUTAM
Volume	14
DOIs	https://doi.org/10.1016/j.piutam.2015.03.025
Publication status	Published - 2015
Event	8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014 - Rio de Janeiro, Brazil Duration: 8 Sept 2014 → 12 Sept 2014

Bibliographical note

Publisher Copyright:
© 2015 The Authors.

Funding

Computing resources used in this work were provided in part by the National Center for High Performance Computing of Turkey (UYBHM) under grant number 1002222012 and by the Barcelona Supercomputing Center (BSc).

Funders	Funder number
National Center for High Performance Computing of Turkey
UYBHM	1002222012
Barcelona Supercomputing Center

Keywords

direct numerical simulation
instability
roughness
separated flow
transition to turbulence

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10.1016/j.piutam.2015.03.025

Cite this

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title = "Transition to Turbulence in a Separated Boundary Layer with Spanwise Perturbations",

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.",

keywords = "direct numerical simulation, instability, roughness, separated flow, transition to turbulence",

author = "Gungor, \{Ayse G.\} and Simens, \{Mark P.\}",

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year = "2015",

doi = "10.1016/j.piutam.2015.03.025",

language = "English",

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pages = "69--77",

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TY - JOUR

T1 - Transition to Turbulence in a Separated Boundary Layer with Spanwise Perturbations

AU - Gungor, Ayse G.

AU - Simens, Mark P.

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

KW - direct numerical simulation

KW - instability

KW - roughness

KW - separated flow

KW - transition to turbulence

UR - https://www.scopus.com/pages/publications/84940669393

U2 - 10.1016/j.piutam.2015.03.025

DO - 10.1016/j.piutam.2015.03.025

M3 - Conference article

AN - SCOPUS:84940669393

SN - 2210-9838

VL - 14

SP - 69

EP - 77

JO - Procedia IUTAM

JF - Procedia IUTAM

T2 - 8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014

Y2 - 8 September 2014 through 12 September 2014

ER -

Transition to Turbulence in a Separated Boundary Layer with Spanwise Perturbations

Abstract

Bibliographical note

Funding

Keywords

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