Experimental vortex breakdown topology in a cylinder with a free surface

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Experimental vortex breakdown topology in a cylinder with a free surface. / Lo Jacono, D.; Nazarinia, M.; Brøns, Morten.

In: Physics of Fluids, Vol. 21, No. 11, 2009, p. 111704.

Research output: Contribution to journalJournal article – Annual report year: 2009Researchpeer-review

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Lo Jacono, D. ; Nazarinia, M. ; Brøns, Morten. / Experimental vortex breakdown topology in a cylinder with a free surface. In: Physics of Fluids. 2009 ; Vol. 21, No. 11. pp. 111704.

Bibtex

@article{a5b9207c26944a6baa76a26a354c1354,
title = "Experimental vortex breakdown topology in a cylinder with a free surface",
abstract = "The free SLII-face, flow in it circular cylinder driven by a rotating bottom disk IS Studied experimentally using particle image velocimetry. Results are compared With computational,11 results assuming I stress-free surface A dye visualization Study by Spohn et al [{"}Observations of vortex breakdown in in open cylindrical container with I rotating bottom,{"} Exp. Fluids 14. 70 (1993)]v as well as several numerical computations. has found a range of different vortex breakdown Structures in this flow. We confirm the existence of a transition where the top of the breakdown bubble crosses from the axis to the surface, which has previously only been found numerically. We employ a technique by Brons et al [{"}Topology of vortex breakdown bubbles in I cylinder with rotating bottom and free surface J. Fluid Mech 428. 133 (2001)] to find the corresponding bifurcation curve in the parameter plane, which has hitherto only been used on numerical data The bifurcation Curve located here agrees well with previous numerical simulations. For low values of the Reynolds number We find a regime with vortex breakdown that has not been previously identified. Experiments deviate substantially from computations, indicating the importance of surface effects ill this regime. (C) 2009 American Institute of Physics. [doi 10 1063/1.3265718]",
author = "{Lo Jacono}, D. and M. Nazarinia and Morten Br{\o}ns",
note = "Copyright (2009) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.",
year = "2009",
doi = "10.1063/1.3265718",
language = "English",
volume = "21",
pages = "111704",
journal = "Physics of Fluids",
issn = "1070-6631",
publisher = "American Institute of Physics",
number = "11",

}

RIS

TY - JOUR

T1 - Experimental vortex breakdown topology in a cylinder with a free surface

AU - Lo Jacono, D.

AU - Nazarinia, M.

AU - Brøns, Morten

N1 - Copyright (2009) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

PY - 2009

Y1 - 2009

N2 - The free SLII-face, flow in it circular cylinder driven by a rotating bottom disk IS Studied experimentally using particle image velocimetry. Results are compared With computational,11 results assuming I stress-free surface A dye visualization Study by Spohn et al ["Observations of vortex breakdown in in open cylindrical container with I rotating bottom," Exp. Fluids 14. 70 (1993)]v as well as several numerical computations. has found a range of different vortex breakdown Structures in this flow. We confirm the existence of a transition where the top of the breakdown bubble crosses from the axis to the surface, which has previously only been found numerically. We employ a technique by Brons et al ["Topology of vortex breakdown bubbles in I cylinder with rotating bottom and free surface J. Fluid Mech 428. 133 (2001)] to find the corresponding bifurcation curve in the parameter plane, which has hitherto only been used on numerical data The bifurcation Curve located here agrees well with previous numerical simulations. For low values of the Reynolds number We find a regime with vortex breakdown that has not been previously identified. Experiments deviate substantially from computations, indicating the importance of surface effects ill this regime. (C) 2009 American Institute of Physics. [doi 10 1063/1.3265718]

AB - The free SLII-face, flow in it circular cylinder driven by a rotating bottom disk IS Studied experimentally using particle image velocimetry. Results are compared With computational,11 results assuming I stress-free surface A dye visualization Study by Spohn et al ["Observations of vortex breakdown in in open cylindrical container with I rotating bottom," Exp. Fluids 14. 70 (1993)]v as well as several numerical computations. has found a range of different vortex breakdown Structures in this flow. We confirm the existence of a transition where the top of the breakdown bubble crosses from the axis to the surface, which has previously only been found numerically. We employ a technique by Brons et al ["Topology of vortex breakdown bubbles in I cylinder with rotating bottom and free surface J. Fluid Mech 428. 133 (2001)] to find the corresponding bifurcation curve in the parameter plane, which has hitherto only been used on numerical data The bifurcation Curve located here agrees well with previous numerical simulations. For low values of the Reynolds number We find a regime with vortex breakdown that has not been previously identified. Experiments deviate substantially from computations, indicating the importance of surface effects ill this regime. (C) 2009 American Institute of Physics. [doi 10 1063/1.3265718]

U2 - 10.1063/1.3265718

DO - 10.1063/1.3265718

M3 - Journal article

VL - 21

SP - 111704

JO - Physics of Fluids

JF - Physics of Fluids

SN - 1070-6631

IS - 11

ER -