Wakes of two inline cylinders at a low Reynolds number

Farhan Zafar; Md Mahbub Alam; Zaka Muhammad; Md Islam

doi:10.12989/was.2019.29.1.055

Wakes of two inline cylinders at a low Reynolds number

Farhan Zafar, Md Mahbub Alam, Zaka Muhammad, Md Islam

Mechanical & Nuclear Engineering

Harbin Institute of Technology

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

4 Scopus citations

Abstract

The effect of vortex impingement on the fluid dynamics around a cylinder submerged in the wake of another of different diameters is numerically investigated at a Reynolds number Re = 200. While the diameter (D) of the downstream cylinder is fixed, impinging vortices are produced from the upstream cylinder diameter (d) varied as d/D = 0.24, 0.4, 0.6, 0.8 and 1.0, with a spacing ratio L = 5.5d, where L is the distance between the center of the upstream cylinder to the front stagnation point of the downstream cylinder. Two-dimensional simulations are carried out using the finite volume method. Fluid forces acting on the two cylinders are correlated with impinging vortices, vortex shedding, and wake structure. Different facets of wake formation, wake structure, and flow separation and their connections to fluid forces are discussed.

Original language	British English
Pages (from-to)	55-64
Number of pages	10
Journal	Wind and Structures, An International Journal
Volume	29
Issue number	1
DOIs	https://doi.org/10.12989/was.2019.29.1.055
State	Published - 2019

Keywords

CFD simulation
Complex terrain
Surface roughness length
Topography
Typhoon wind field

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10.12989/was.2019.29.1.055

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title = "Wakes of two inline cylinders at a low Reynolds number",

abstract = "The effect of vortex impingement on the fluid dynamics around a cylinder submerged in the wake of another of different diameters is numerically investigated at a Reynolds number Re = 200. While the diameter (D) of the downstream cylinder is fixed, impinging vortices are produced from the upstream cylinder diameter (d) varied as d/D = 0.24, 0.4, 0.6, 0.8 and 1.0, with a spacing ratio L = 5.5d, where L is the distance between the center of the upstream cylinder to the front stagnation point of the downstream cylinder. Two-dimensional simulations are carried out using the finite volume method. Fluid forces acting on the two cylinders are correlated with impinging vortices, vortex shedding, and wake structure. Different facets of wake formation, wake structure, and flow separation and their connections to fluid forces are discussed.",

keywords = "CFD simulation, Complex terrain, Surface roughness length, Topography, Typhoon wind field",

author = "Farhan Zafar and \{Mahbub Alam\}, Md and Zaka Muhammad and Md Islam",

note = "Funding Information: ALAM wishes to acknowledge the support given by the National Natural Science Foundation of China through Grants 11672096 and 91752112 and by Research Grant Council of Shenzhen Government through grant JCYJ20170811152808282. Publisher Copyright: Copyright {\textcopyright} 2019 Techno-Press, Ltd.",

year = "2019",

doi = "10.12989/was.2019.29.1.055",

language = "British English",

volume = "29",

pages = "55--64",

journal = "Wind and Structures, An International Journal",

issn = "1226-6116",

publisher = "Techno Press",

number = "1",

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TY - JOUR

T1 - Wakes of two inline cylinders at a low Reynolds number

AU - Zafar, Farhan

AU - Mahbub Alam, Md

AU - Muhammad, Zaka

AU - Islam, Md

N1 - Funding Information: ALAM wishes to acknowledge the support given by the National Natural Science Foundation of China through Grants 11672096 and 91752112 and by Research Grant Council of Shenzhen Government through grant JCYJ20170811152808282. Publisher Copyright: Copyright © 2019 Techno-Press, Ltd.

PY - 2019

Y1 - 2019

N2 - The effect of vortex impingement on the fluid dynamics around a cylinder submerged in the wake of another of different diameters is numerically investigated at a Reynolds number Re = 200. While the diameter (D) of the downstream cylinder is fixed, impinging vortices are produced from the upstream cylinder diameter (d) varied as d/D = 0.24, 0.4, 0.6, 0.8 and 1.0, with a spacing ratio L = 5.5d, where L is the distance between the center of the upstream cylinder to the front stagnation point of the downstream cylinder. Two-dimensional simulations are carried out using the finite volume method. Fluid forces acting on the two cylinders are correlated with impinging vortices, vortex shedding, and wake structure. Different facets of wake formation, wake structure, and flow separation and their connections to fluid forces are discussed.

AB - The effect of vortex impingement on the fluid dynamics around a cylinder submerged in the wake of another of different diameters is numerically investigated at a Reynolds number Re = 200. While the diameter (D) of the downstream cylinder is fixed, impinging vortices are produced from the upstream cylinder diameter (d) varied as d/D = 0.24, 0.4, 0.6, 0.8 and 1.0, with a spacing ratio L = 5.5d, where L is the distance between the center of the upstream cylinder to the front stagnation point of the downstream cylinder. Two-dimensional simulations are carried out using the finite volume method. Fluid forces acting on the two cylinders are correlated with impinging vortices, vortex shedding, and wake structure. Different facets of wake formation, wake structure, and flow separation and their connections to fluid forces are discussed.

KW - CFD simulation

KW - Complex terrain

KW - Surface roughness length

KW - Topography

KW - Typhoon wind field

UR - https://www.scopus.com/pages/publications/85068752111

U2 - 10.12989/was.2019.29.1.055

DO - 10.12989/was.2019.29.1.055

M3 - Article

AN - SCOPUS:85068752111

SN - 1226-6116

VL - 29

SP - 55

EP - 64

JO - Wind and Structures, An International Journal

JF - Wind and Structures, An International Journal

IS - 1

ER -

Wakes of two inline cylinders at a low Reynolds number

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