3D vortex structure investigation using Large Eddy Simulation of flow around a rotary oscillating circular cylinder

Liyes Aguedal; Djaffar Semmar; Abdallah S. Berrouk; Abdelwahid Azzi; Hamid Oualli

doi:10.1016/j.euromechflu.2018.04.001

3D vortex structure investigation using Large Eddy Simulation of flow around a rotary oscillating circular cylinder

Liyes Aguedal, Djaffar Semmar, Abdallah S. Berrouk, Abdelwahid Azzi, Hamid Oualli

Mechanical & Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Three-dimensional turbulent flow over a circular cylinder performing sinusoidal rotational motions around its axis is investigated using Large Eddy Simulation (LES). The simulation is carried out for Reynolds number equal to 3900 with rotation rate (Ω=θ_osc*r∕U₀, where θ_osc is oscillation amplitude, r cylinder radius, and U₀ flow velocity) varying from 0.5 to 2; and with non-dimensional forcing frequencies (ratio of the frequency of the cylinder oscillation and that of the vortex-shedding from a stationary cylinder) from 0 to 8. Time-averaged flow parameters as well as mean drag and lift coefficients, mean base pressure coefficient, and separation angle and mean length of the vortex formation region are obtained and thoroughly analyzed. It was found that under forcing control, 50% of drag reduction was achieved and the flow three-dimensionality was reduced in the lock-on range.

Original language	British English
Pages (from-to)	113-125
Number of pages	13
Journal	European Journal of Mechanics, B/Fluids
Volume	71
DOIs	https://doi.org/10.1016/j.euromechflu.2018.04.001
State	Published - 1 Sep 2018

Keywords

Circular cylinder
Drag reduction
Large Eddy simulation
Lock-in region
Rotary oscillation
Vortex structure

Access to Document

10.1016/j.euromechflu.2018.04.001

Cite this

@article{7c00f5c0de904b2891bd1e94272b7333,

title = "3D vortex structure investigation using Large Eddy Simulation of flow around a rotary oscillating circular cylinder",

abstract = "Three-dimensional turbulent flow over a circular cylinder performing sinusoidal rotational motions around its axis is investigated using Large Eddy Simulation (LES). The simulation is carried out for Reynolds number equal to 3900 with rotation rate (Ω=θosc*r∕U0, where θosc is oscillation amplitude, r cylinder radius, and U0 flow velocity) varying from 0.5 to 2; and with non-dimensional forcing frequencies (ratio of the frequency of the cylinder oscillation and that of the vortex-shedding from a stationary cylinder) from 0 to 8. Time-averaged flow parameters as well as mean drag and lift coefficients, mean base pressure coefficient, and separation angle and mean length of the vortex formation region are obtained and thoroughly analyzed. It was found that under forcing control, 50% of drag reduction was achieved and the flow three-dimensionality was reduced in the lock-on range.",

keywords = "Circular cylinder, Drag reduction, Large Eddy simulation, Lock-in region, Rotary oscillation, Vortex structure",

author = "Liyes Aguedal and Djaffar Semmar and Berrouk, {Abdallah S.} and Abdelwahid Azzi and Hamid Oualli",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Masson SAS",

year = "2018",

month = sep,

day = "1",

doi = "10.1016/j.euromechflu.2018.04.001",

language = "British English",

volume = "71",

pages = "113--125",

journal = "European Journal of Mechanics, B/Fluids",

issn = "0997-7546",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - 3D vortex structure investigation using Large Eddy Simulation of flow around a rotary oscillating circular cylinder

AU - Aguedal, Liyes

AU - Semmar, Djaffar

AU - Berrouk, Abdallah S.

AU - Azzi, Abdelwahid

AU - Oualli, Hamid

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Three-dimensional turbulent flow over a circular cylinder performing sinusoidal rotational motions around its axis is investigated using Large Eddy Simulation (LES). The simulation is carried out for Reynolds number equal to 3900 with rotation rate (Ω=θosc*r∕U0, where θosc is oscillation amplitude, r cylinder radius, and U0 flow velocity) varying from 0.5 to 2; and with non-dimensional forcing frequencies (ratio of the frequency of the cylinder oscillation and that of the vortex-shedding from a stationary cylinder) from 0 to 8. Time-averaged flow parameters as well as mean drag and lift coefficients, mean base pressure coefficient, and separation angle and mean length of the vortex formation region are obtained and thoroughly analyzed. It was found that under forcing control, 50% of drag reduction was achieved and the flow three-dimensionality was reduced in the lock-on range.

AB - Three-dimensional turbulent flow over a circular cylinder performing sinusoidal rotational motions around its axis is investigated using Large Eddy Simulation (LES). The simulation is carried out for Reynolds number equal to 3900 with rotation rate (Ω=θosc*r∕U0, where θosc is oscillation amplitude, r cylinder radius, and U0 flow velocity) varying from 0.5 to 2; and with non-dimensional forcing frequencies (ratio of the frequency of the cylinder oscillation and that of the vortex-shedding from a stationary cylinder) from 0 to 8. Time-averaged flow parameters as well as mean drag and lift coefficients, mean base pressure coefficient, and separation angle and mean length of the vortex formation region are obtained and thoroughly analyzed. It was found that under forcing control, 50% of drag reduction was achieved and the flow three-dimensionality was reduced in the lock-on range.

KW - Circular cylinder

KW - Drag reduction

KW - Large Eddy simulation

KW - Lock-in region

KW - Rotary oscillation

KW - Vortex structure

UR - http://www.scopus.com/inward/record.url?scp=85046463102&partnerID=8YFLogxK

U2 - 10.1016/j.euromechflu.2018.04.001

DO - 10.1016/j.euromechflu.2018.04.001

M3 - Article

AN - SCOPUS:85046463102

SN - 0997-7546

VL - 71

SP - 113

EP - 125

JO - European Journal of Mechanics, B/Fluids

JF - European Journal of Mechanics, B/Fluids

ER -

3D vortex structure investigation using Large Eddy Simulation of flow around a rotary oscillating circular cylinder

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this