Harmonically forced enclosed swirling flow

Y. D. Cui, Juan Lopez, T. T. Lim, F. Marques

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The response of steady state vortex flows in an enclosed circular cylinder driven by the harmonic modulation of the rotating end wall is investigated experimentally and numerically. Three dynamic regimes have been identified, with a continuous variation in forcing frequency between them. For very low forcing frequency, the synchronous flow approaches quasistatic adjustment, and for very large forcing frequencies the oscillations in the synchronous flow are localized in the boundary layers on the various cylinder walls. These localized wall oscillations drive the synchronous flow in the cylinder interior to the underlying axisymmetric steady basic state. The third regime occurs for forcing frequencies in the range of the most dangerous axisymmetric Hopf eigenfrequencies, with the 1:1 resonances leading to greatly enhanced oscillation amplitudes localized in the axis region where the flow manifests vortex breakdown recirculation zones.

Original languageEnglish (US)
Article number034106
JournalPhysics of Fluids
Volume21
Issue number3
DOIs
StatePublished - 2009

Fingerprint

Swirling flow
swirling
Vortex flow
Circular cylinders
oscillations
Boundary layers
Modulation
vortex breakdown
circular cylinders
boundary layers
adjusting
vortices
harmonics
modulation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Harmonically forced enclosed swirling flow. / Cui, Y. D.; Lopez, Juan; Lim, T. T.; Marques, F.

In: Physics of Fluids, Vol. 21, No. 3, 034106, 2009.

Research output: Contribution to journalArticle

Cui, Y. D. ; Lopez, Juan ; Lim, T. T. ; Marques, F. / Harmonically forced enclosed swirling flow. In: Physics of Fluids. 2009 ; Vol. 21, No. 3.
@article{c6626a11549f43e6aa751c5c0f1e827f,
title = "Harmonically forced enclosed swirling flow",
abstract = "The response of steady state vortex flows in an enclosed circular cylinder driven by the harmonic modulation of the rotating end wall is investigated experimentally and numerically. Three dynamic regimes have been identified, with a continuous variation in forcing frequency between them. For very low forcing frequency, the synchronous flow approaches quasistatic adjustment, and for very large forcing frequencies the oscillations in the synchronous flow are localized in the boundary layers on the various cylinder walls. These localized wall oscillations drive the synchronous flow in the cylinder interior to the underlying axisymmetric steady basic state. The third regime occurs for forcing frequencies in the range of the most dangerous axisymmetric Hopf eigenfrequencies, with the 1:1 resonances leading to greatly enhanced oscillation amplitudes localized in the axis region where the flow manifests vortex breakdown recirculation zones.",
author = "Cui, {Y. D.} and Juan Lopez and Lim, {T. T.} and F. Marques",
year = "2009",
doi = "10.1063/1.3093236",
language = "English (US)",
volume = "21",
journal = "Physics of Fluids",
issn = "1070-6631",
publisher = "American Institute of Physics Publising LLC",
number = "3",

}

TY - JOUR

T1 - Harmonically forced enclosed swirling flow

AU - Cui, Y. D.

AU - Lopez, Juan

AU - Lim, T. T.

AU - Marques, F.

PY - 2009

Y1 - 2009

N2 - The response of steady state vortex flows in an enclosed circular cylinder driven by the harmonic modulation of the rotating end wall is investigated experimentally and numerically. Three dynamic regimes have been identified, with a continuous variation in forcing frequency between them. For very low forcing frequency, the synchronous flow approaches quasistatic adjustment, and for very large forcing frequencies the oscillations in the synchronous flow are localized in the boundary layers on the various cylinder walls. These localized wall oscillations drive the synchronous flow in the cylinder interior to the underlying axisymmetric steady basic state. The third regime occurs for forcing frequencies in the range of the most dangerous axisymmetric Hopf eigenfrequencies, with the 1:1 resonances leading to greatly enhanced oscillation amplitudes localized in the axis region where the flow manifests vortex breakdown recirculation zones.

AB - The response of steady state vortex flows in an enclosed circular cylinder driven by the harmonic modulation of the rotating end wall is investigated experimentally and numerically. Three dynamic regimes have been identified, with a continuous variation in forcing frequency between them. For very low forcing frequency, the synchronous flow approaches quasistatic adjustment, and for very large forcing frequencies the oscillations in the synchronous flow are localized in the boundary layers on the various cylinder walls. These localized wall oscillations drive the synchronous flow in the cylinder interior to the underlying axisymmetric steady basic state. The third regime occurs for forcing frequencies in the range of the most dangerous axisymmetric Hopf eigenfrequencies, with the 1:1 resonances leading to greatly enhanced oscillation amplitudes localized in the axis region where the flow manifests vortex breakdown recirculation zones.

UR - http://www.scopus.com/inward/record.url?scp=64249167606&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=64249167606&partnerID=8YFLogxK

U2 - 10.1063/1.3093236

DO - 10.1063/1.3093236

M3 - Article

AN - SCOPUS:64249167606

VL - 21

JO - Physics of Fluids

JF - Physics of Fluids

SN - 1070-6631

IS - 3

M1 - 034106

ER -