Three-dimensional transition of a water flow around a heated cylinder at Re=85 and Ri =1.0

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)
1 Downloads (Pure)

Abstract

The three-dimensional flow transition behind a heated cylinder subjected to a horizontal flow (water is used as the working fluid; Pr=7) at a Reynolds number Re=85 and a Richardson number Ri=1.0, manifests itself in the far-wake as escaping mushroom-type structures from the upper vortices. The origin of the escaping mushroom-type structures lies in the generation of streamwise vorticity in the near-wake, which is described as a cyclic-process. In the presence of a spanwise temperature gradient in the near-wake, streamwise vorticity is generated, which results from baroclinic vorticity production. Due to these streamwise vorticity regions, low-speed flow will move upwards at so-called in-plume positions resulting in high- and low-speed streaks in the upper half of the wake. Next, `transverse' vorticity is generated by the spanwise gradients in the streamwise velocity component, resulting in counter-rotating vortices directly behind the cylinder. These vortices lead to high- and low-temperature regions in spanwise direction and the process repeats itself.
Original languageEnglish
Pages (from-to)195-224
Number of pages30
JournalJournal of Fluid Mechanics
Volume566
Issue number1
DOIs
Publication statusPublished - 2006

Fingerprint

water flow
Vorticity
vorticity
near wakes
Vortex flow
Water
vortices
wakes
low speed
Transition flow
Richardson number
three dimensional flow
working fluids
Thermal gradients
plumes
Reynolds number
temperature gradients
counters
high speed
gradients

Cite this

@article{d760ed409a2340409868c6cc844cb5cd,
title = "Three-dimensional transition of a water flow around a heated cylinder at Re=85 and Ri =1.0",
abstract = "The three-dimensional flow transition behind a heated cylinder subjected to a horizontal flow (water is used as the working fluid; Pr=7) at a Reynolds number Re=85 and a Richardson number Ri=1.0, manifests itself in the far-wake as escaping mushroom-type structures from the upper vortices. The origin of the escaping mushroom-type structures lies in the generation of streamwise vorticity in the near-wake, which is described as a cyclic-process. In the presence of a spanwise temperature gradient in the near-wake, streamwise vorticity is generated, which results from baroclinic vorticity production. Due to these streamwise vorticity regions, low-speed flow will move upwards at so-called in-plume positions resulting in high- and low-speed streaks in the upper half of the wake. Next, `transverse' vorticity is generated by the spanwise gradients in the streamwise velocity component, resulting in counter-rotating vortices directly behind the cylinder. These vortices lead to high- and low-temperature regions in spanwise direction and the process repeats itself.",
author = "M. Ren and C.C.M. Rindt and {Steenhoven, van}, A.A.",
year = "2006",
doi = "10.1017/S0022112006001923",
language = "English",
volume = "566",
pages = "195--224",
journal = "Journal of Fluid Mechanics",
issn = "0022-1120",
publisher = "Cambridge University Press",
number = "1",

}

Three-dimensional transition of a water flow around a heated cylinder at Re=85 and Ri =1.0. / Ren, M.; Rindt, C.C.M.; Steenhoven, van, A.A.

In: Journal of Fluid Mechanics, Vol. 566, No. 1, 2006, p. 195-224.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Three-dimensional transition of a water flow around a heated cylinder at Re=85 and Ri =1.0

AU - Ren, M.

AU - Rindt, C.C.M.

AU - Steenhoven, van, A.A.

PY - 2006

Y1 - 2006

N2 - The three-dimensional flow transition behind a heated cylinder subjected to a horizontal flow (water is used as the working fluid; Pr=7) at a Reynolds number Re=85 and a Richardson number Ri=1.0, manifests itself in the far-wake as escaping mushroom-type structures from the upper vortices. The origin of the escaping mushroom-type structures lies in the generation of streamwise vorticity in the near-wake, which is described as a cyclic-process. In the presence of a spanwise temperature gradient in the near-wake, streamwise vorticity is generated, which results from baroclinic vorticity production. Due to these streamwise vorticity regions, low-speed flow will move upwards at so-called in-plume positions resulting in high- and low-speed streaks in the upper half of the wake. Next, `transverse' vorticity is generated by the spanwise gradients in the streamwise velocity component, resulting in counter-rotating vortices directly behind the cylinder. These vortices lead to high- and low-temperature regions in spanwise direction and the process repeats itself.

AB - The three-dimensional flow transition behind a heated cylinder subjected to a horizontal flow (water is used as the working fluid; Pr=7) at a Reynolds number Re=85 and a Richardson number Ri=1.0, manifests itself in the far-wake as escaping mushroom-type structures from the upper vortices. The origin of the escaping mushroom-type structures lies in the generation of streamwise vorticity in the near-wake, which is described as a cyclic-process. In the presence of a spanwise temperature gradient in the near-wake, streamwise vorticity is generated, which results from baroclinic vorticity production. Due to these streamwise vorticity regions, low-speed flow will move upwards at so-called in-plume positions resulting in high- and low-speed streaks in the upper half of the wake. Next, `transverse' vorticity is generated by the spanwise gradients in the streamwise velocity component, resulting in counter-rotating vortices directly behind the cylinder. These vortices lead to high- and low-temperature regions in spanwise direction and the process repeats itself.

U2 - 10.1017/S0022112006001923

DO - 10.1017/S0022112006001923

M3 - Article

VL - 566

SP - 195

EP - 224

JO - Journal of Fluid Mechanics

JF - Journal of Fluid Mechanics

SN - 0022-1120

IS - 1

ER -