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

^*Bu çalışma için yazışmadan sorumlu yazar

Uzay Mühendisliği Bölümü

Technical University of Madrid

Araştırma çıktısı: Dergi yayını › Konferans makalesi › Hakem

3 Atıf (Scopus)

Özet

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.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	69-77
Sayfa sayısı	9
Dergi	Procedia IUTAM
Hacim	14
DOI'lar	https://doi.org/10.1016/j.piutam.2015.03.025
Yayın durumu	Yayınlandı - 2015
Etkinlik	8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014 - Rio de Janeiro, Brazil Süre: 8 Eyl 2014 → 12 Eyl 2014

Bibliyografik not

Publisher Copyright:
© 2015 The Authors.

Finansman

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).

Finansörler	Finansör numarası
National Center for High Performance Computing of Turkey
UYBHM	1002222012
Barcelona Supercomputing Center

Belgeye Erişim

10.1016/j.piutam.2015.03.025

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

@article{c4bf36300be04ccfacba10525e716f42,

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.\}",

note = "Publisher Copyright: {\textcopyright} 2015 The Authors.; 8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014 ; Conference date: 08-09-2014 Through 12-09-2014",

year = "2015",

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

language = "English",

volume = "14",

pages = "69--77",

journal = "Procedia IUTAM",

issn = "2210-9838",

}

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

Özet

Bibliyografik not

Finansman

Belgeye Erişim

Diğer Dosyalar ve Linkler

Parmak izi

Alıntı Yap