Low KC flow regimes of oscillating sharp edges I. Vortex shedding observation

Longbin Tao; Krish Thiagarajan

doi:10.1016/S0141-1187(03)00031-2

Low KC flow regimes of oscillating sharp edges I. Vortex shedding observation

Longbin Tao^*, Krish Thiagarajan

^*Corresponding author for this work

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

115 Citations (Scopus)

Abstract

Viscous flow around an oscillating vertical cylinder with a disk attached at keel is studied in detail by direct numerical simulation based on finite difference method. Over the range of flow parameters investigated, viz. Keulegan-Carpenter number (KC) from 7.5 × 10^-4 to 0.75 and β = 1.585 × 10⁵, three shedding modes were observed. These modes, named independent, interactive and uni-directional, are found to be governed by both flow parameters (KC, β) and the geometry of the disk, such as aspect ratio, t_d/D_d. The mechanism for the initial condition dependence of the asymmetric uni-directional vortex shedding is analyzed. The effects of KC number and aspect ratio of the disk on the vortex shedding angle are also presented.

Original language	English
Pages (from-to)	21-35
Number of pages	15
Journal	Applied Ocean Research
Volume	25
Issue number	1
DOIs	https://doi.org/10.1016/S0141-1187(03)00031-2
Publication status	Published - 28 Feb 2003
Externally published	Yes

Keywords

flow regime
Keulegan-Carpenter number
sharp-edged body
vortex shedding

Access to Document

10.1016/S0141-1187(03)00031-2

Cite this

@article{e89c38bcd4f54e069f700a8efd64c61d,

title = "Low KC flow regimes of oscillating sharp edges I. Vortex shedding observation",

abstract = "Viscous flow around an oscillating vertical cylinder with a disk attached at keel is studied in detail by direct numerical simulation based on finite difference method. Over the range of flow parameters investigated, viz. Keulegan-Carpenter number (KC) from 7.5 × 10-4 to 0.75 and β = 1.585 × 105, three shedding modes were observed. These modes, named independent, interactive and uni-directional, are found to be governed by both flow parameters (KC, β) and the geometry of the disk, such as aspect ratio, td/Dd. The mechanism for the initial condition dependence of the asymmetric uni-directional vortex shedding is analyzed. The effects of KC number and aspect ratio of the disk on the vortex shedding angle are also presented.",

keywords = "flow regime, Keulegan-Carpenter number, sharp-edged body, vortex shedding",

author = "Longbin Tao and Krish Thiagarajan",

year = "2003",

month = feb,

day = "28",

doi = "10.1016/S0141-1187(03)00031-2",

language = "English",

volume = "25",

pages = "21--35",

journal = "Applied Ocean Research",

issn = "0141-1187",

publisher = "Elsevier B.V.",

number = "1",

}

TY - JOUR

T1 - Low KC flow regimes of oscillating sharp edges I. Vortex shedding observation

AU - Tao, Longbin

AU - Thiagarajan, Krish

PY - 2003/2/28

Y1 - 2003/2/28

N2 - Viscous flow around an oscillating vertical cylinder with a disk attached at keel is studied in detail by direct numerical simulation based on finite difference method. Over the range of flow parameters investigated, viz. Keulegan-Carpenter number (KC) from 7.5 × 10-4 to 0.75 and β = 1.585 × 105, three shedding modes were observed. These modes, named independent, interactive and uni-directional, are found to be governed by both flow parameters (KC, β) and the geometry of the disk, such as aspect ratio, td/Dd. The mechanism for the initial condition dependence of the asymmetric uni-directional vortex shedding is analyzed. The effects of KC number and aspect ratio of the disk on the vortex shedding angle are also presented.

AB - Viscous flow around an oscillating vertical cylinder with a disk attached at keel is studied in detail by direct numerical simulation based on finite difference method. Over the range of flow parameters investigated, viz. Keulegan-Carpenter number (KC) from 7.5 × 10-4 to 0.75 and β = 1.585 × 105, three shedding modes were observed. These modes, named independent, interactive and uni-directional, are found to be governed by both flow parameters (KC, β) and the geometry of the disk, such as aspect ratio, td/Dd. The mechanism for the initial condition dependence of the asymmetric uni-directional vortex shedding is analyzed. The effects of KC number and aspect ratio of the disk on the vortex shedding angle are also presented.

KW - flow regime

KW - Keulegan-Carpenter number

KW - sharp-edged body

KW - vortex shedding

UR - https://www.scopus.com/pages/publications/0042123721

UR - http://www.sciencedirect.com/science/journal/01411187

U2 - 10.1016/S0141-1187(03)00031-2

DO - 10.1016/S0141-1187(03)00031-2

M3 - Article

AN - SCOPUS:0042123721

SN - 0141-1187

VL - 25

SP - 21

EP - 35

JO - Applied Ocean Research

JF - Applied Ocean Research

IS - 1

ER -

Low KC flow regimes of oscillating sharp edges I. Vortex shedding observation

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this