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

Longbin Tao, Krish Thiagarajan

Research output: Contribution to journalArticle

63 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, 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.

LanguageEnglish
Pages21-35
Number of pages15
JournalApplied Ocean Research
Volume25
Issue number1
DOIs
Publication statusPublished - 28 Feb 2003
Externally publishedYes

Fingerprint

Vortex shedding
Aspect ratio
Direct numerical simulation
Viscous flow
Finite difference method
Geometry

Keywords

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

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 = "2",
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 BV",
number = "1",

}

Low KC flow regimes of oscillating sharp edges I. Vortex shedding observation. / Tao, Longbin; Thiagarajan, Krish.

In: Applied Ocean Research, Vol. 25, No. 1, 28.02.2003, p. 21-35.

Research output: Contribution to journalArticle

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 - http://www.scopus.com/inward/record.url?scp=0042123721&partnerID=8YFLogxK

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

VL - 25

SP - 21

EP - 35

JO - Applied Ocean Research

T2 - Applied Ocean Research

JF - Applied Ocean Research

SN - 0141-1187

IS - 1

ER -