Behavior of streamwise rib vortices in a three-dimensional mixing layer

Juan Lopez, C. J. Bulbeck

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The structure and behavior of a streamwise rib vortex in a direct numerical simulation of a time-developing three-dimensional incompressible plane mixing layer is examined. Where the rib vortex is being stretched, the vorticity vector is primarily directed in the vortex axial direction and the radial and azimuthal velocity distribution is similar to that of a Burgers vortex. In the region where the vortex stretching is negative, there is a change in the local topology of the vortex. The axial flow is decelerated and a negative azimuthal component of vorticity is induced. These features are characteristic of vortex breakdown. The temporal evolution of the rib vortex is similar to the evolution of an axisymmetric vortex in the early stages of vortex breakdown. The effect of vortex breakdown on other parts of the flow is, however, not as significant as the interaction between the rib vortex and other vortical structures.

Original languageEnglish (US)
Pages (from-to)1694-1702
Number of pages9
JournalPhysics of Fluids A
Volume5
Issue number7
StatePublished - 1992
Externally publishedYes

Fingerprint

Vortex flow
vortices
vortex breakdown
vorticity
Vorticity
axial flow
direct numerical simulation
radial velocity
Axial flow
Direct numerical simulation
topology
velocity distribution
Velocity distribution
Stretching
Topology

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes
  • Engineering(all)

Cite this

Behavior of streamwise rib vortices in a three-dimensional mixing layer. / Lopez, Juan; Bulbeck, C. J.

In: Physics of Fluids A, Vol. 5, No. 7, 1992, p. 1694-1702.

Research output: Contribution to journalArticle

@article{8c2714408851480495e96d4e529e7dd6,
title = "Behavior of streamwise rib vortices in a three-dimensional mixing layer",
abstract = "The structure and behavior of a streamwise rib vortex in a direct numerical simulation of a time-developing three-dimensional incompressible plane mixing layer is examined. Where the rib vortex is being stretched, the vorticity vector is primarily directed in the vortex axial direction and the radial and azimuthal velocity distribution is similar to that of a Burgers vortex. In the region where the vortex stretching is negative, there is a change in the local topology of the vortex. The axial flow is decelerated and a negative azimuthal component of vorticity is induced. These features are characteristic of vortex breakdown. The temporal evolution of the rib vortex is similar to the evolution of an axisymmetric vortex in the early stages of vortex breakdown. The effect of vortex breakdown on other parts of the flow is, however, not as significant as the interaction between the rib vortex and other vortical structures.",
author = "Juan Lopez and Bulbeck, {C. J.}",
year = "1992",
language = "English (US)",
volume = "5",
pages = "1694--1702",
journal = "Physics of fluids. A, Fluid dynamics",
issn = "0899-8213",
publisher = "American Institute of Physics Publising LLC",
number = "7",

}

TY - JOUR

T1 - Behavior of streamwise rib vortices in a three-dimensional mixing layer

AU - Lopez, Juan

AU - Bulbeck, C. J.

PY - 1992

Y1 - 1992

N2 - The structure and behavior of a streamwise rib vortex in a direct numerical simulation of a time-developing three-dimensional incompressible plane mixing layer is examined. Where the rib vortex is being stretched, the vorticity vector is primarily directed in the vortex axial direction and the radial and azimuthal velocity distribution is similar to that of a Burgers vortex. In the region where the vortex stretching is negative, there is a change in the local topology of the vortex. The axial flow is decelerated and a negative azimuthal component of vorticity is induced. These features are characteristic of vortex breakdown. The temporal evolution of the rib vortex is similar to the evolution of an axisymmetric vortex in the early stages of vortex breakdown. The effect of vortex breakdown on other parts of the flow is, however, not as significant as the interaction between the rib vortex and other vortical structures.

AB - The structure and behavior of a streamwise rib vortex in a direct numerical simulation of a time-developing three-dimensional incompressible plane mixing layer is examined. Where the rib vortex is being stretched, the vorticity vector is primarily directed in the vortex axial direction and the radial and azimuthal velocity distribution is similar to that of a Burgers vortex. In the region where the vortex stretching is negative, there is a change in the local topology of the vortex. The axial flow is decelerated and a negative azimuthal component of vorticity is induced. These features are characteristic of vortex breakdown. The temporal evolution of the rib vortex is similar to the evolution of an axisymmetric vortex in the early stages of vortex breakdown. The effect of vortex breakdown on other parts of the flow is, however, not as significant as the interaction between the rib vortex and other vortical structures.

UR - http://www.scopus.com/inward/record.url?scp=0027498317&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027498317&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0027498317

VL - 5

SP - 1694

EP - 1702

JO - Physics of fluids. A, Fluid dynamics

JF - Physics of fluids. A, Fluid dynamics

SN - 0899-8213

IS - 7

ER -