Precursor of transition to turbulence in an oscillatory flow

Atsushi Nakano, Hironobu Tohyama, Kazuo Tanishita, Sho Kikkawa

Research output: Contribution to journalArticle

Abstract

The measurements of velocity on the turbulence occurring in a purely oscillatory pipe flow were performed by hot-wire anemometer for the Reynolds number Re (defined using the amplitude of cross-sectionally averaged velocity) of 30 000 and for the value of the Stokes parameter λ = a/(ν/ω) 1/2 (a = internal radius of tube, ν = kinematic viscosity, ω = angular frequency) of 8. The transition to turbulence occurring in an oscillatory flow is evaluated in terms of turbulent intensity, skewness and flatness factors. The peak of skewness and flatness factors appears in front of the peak of turbulent intensity. Particularly, the rise of the flatness factor preceding the transition to turbulence signifies the appearance of an intermittent nature of turbulence and is characterized as a precursor of the transition to turbulence.

Original languageEnglish
Pages (from-to)3395-3401
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume57
Issue number542
Publication statusPublished - 1991 Oct

Fingerprint

Turbulence
turbulence
flatness
skewness
hot-wire anemometers
pipe flow
Anemometers
Pipe flow
Reynolds number
kinematics
Wire
Viscosity
viscosity
tubes
radii

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Precursor of transition to turbulence in an oscillatory flow. / Nakano, Atsushi; Tohyama, Hironobu; Tanishita, Kazuo; Kikkawa, Sho.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 57, No. 542, 10.1991, p. 3395-3401.

Research output: Contribution to journalArticle

Nakano, Atsushi ; Tohyama, Hironobu ; Tanishita, Kazuo ; Kikkawa, Sho. / Precursor of transition to turbulence in an oscillatory flow. In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B. 1991 ; Vol. 57, No. 542. pp. 3395-3401.
@article{e8cd871d60d34d4ea20581468dfca7d7,
title = "Precursor of transition to turbulence in an oscillatory flow",
abstract = "The measurements of velocity on the turbulence occurring in a purely oscillatory pipe flow were performed by hot-wire anemometer for the Reynolds number Re (defined using the amplitude of cross-sectionally averaged velocity) of 30 000 and for the value of the Stokes parameter λ = a/(ν/ω) 1/2 (a = internal radius of tube, ν = kinematic viscosity, ω = angular frequency) of 8. The transition to turbulence occurring in an oscillatory flow is evaluated in terms of turbulent intensity, skewness and flatness factors. The peak of skewness and flatness factors appears in front of the peak of turbulent intensity. Particularly, the rise of the flatness factor preceding the transition to turbulence signifies the appearance of an intermittent nature of turbulence and is characterized as a precursor of the transition to turbulence.",
author = "Atsushi Nakano and Hironobu Tohyama and Kazuo Tanishita and Sho Kikkawa",
year = "1991",
month = "10",
language = "English",
volume = "57",
pages = "3395--3401",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "Japan Society of Mechanical Engineers",
number = "542",

}

TY - JOUR

T1 - Precursor of transition to turbulence in an oscillatory flow

AU - Nakano, Atsushi

AU - Tohyama, Hironobu

AU - Tanishita, Kazuo

AU - Kikkawa, Sho

PY - 1991/10

Y1 - 1991/10

N2 - The measurements of velocity on the turbulence occurring in a purely oscillatory pipe flow were performed by hot-wire anemometer for the Reynolds number Re (defined using the amplitude of cross-sectionally averaged velocity) of 30 000 and for the value of the Stokes parameter λ = a/(ν/ω) 1/2 (a = internal radius of tube, ν = kinematic viscosity, ω = angular frequency) of 8. The transition to turbulence occurring in an oscillatory flow is evaluated in terms of turbulent intensity, skewness and flatness factors. The peak of skewness and flatness factors appears in front of the peak of turbulent intensity. Particularly, the rise of the flatness factor preceding the transition to turbulence signifies the appearance of an intermittent nature of turbulence and is characterized as a precursor of the transition to turbulence.

AB - The measurements of velocity on the turbulence occurring in a purely oscillatory pipe flow were performed by hot-wire anemometer for the Reynolds number Re (defined using the amplitude of cross-sectionally averaged velocity) of 30 000 and for the value of the Stokes parameter λ = a/(ν/ω) 1/2 (a = internal radius of tube, ν = kinematic viscosity, ω = angular frequency) of 8. The transition to turbulence occurring in an oscillatory flow is evaluated in terms of turbulent intensity, skewness and flatness factors. The peak of skewness and flatness factors appears in front of the peak of turbulent intensity. Particularly, the rise of the flatness factor preceding the transition to turbulence signifies the appearance of an intermittent nature of turbulence and is characterized as a precursor of the transition to turbulence.

UR - http://www.scopus.com/inward/record.url?scp=0026243040&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026243040&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0026243040

VL - 57

SP - 3395

EP - 3401

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 542

ER -