Transient perturbation growth of vortex rings

Fei Chen; Bofu Wang; Daniel Wacks; Daniel Cabezon; Xuerui Mao

doi:10.1088/1742-6596/753/3/032049

Transient perturbation growth of vortex rings

Fei Chen, Bofu Wang, Daniel Wacks, Daniel Cabezon, Xuerui Mao

Research output: Contribution to journal › Conference article › peer-review

Abstract

Perturbations to a vortex ring with largest transient energy growth are calculated and applied to drive the vortex ring to evolve. Optimal initial perturbations appear at azimuthal wave numbers β = 0 and β = 9. The former was described as 'axial flow' and is not related to the breakdown of the ring, while the latter is critical to the ring breakdown process as observed in previous direct numerical simulation (DNS) with random initial noise input. In the present work, DNS is conducted to study the nonlinear development of the optimal perturbations, and good agreement with past studies is achieved.

Original language	English
Article number	032049
Journal	Journal of Physics: Conference Series
Volume	753
Issue number	3
DOIs	https://doi.org/10.1088/1742-6596/753/3/032049
Publication status	Published - 3 Oct 2016
Externally published	Yes
Event	Science of Making Torque from Wind, TORQUE 2016 - Munich, Germany Duration: 5 Oct 2016 → 7 Oct 2016

Access to Document

10.1088/1742-6596/753/3/032049

Cite this

@article{7b6831ed966e4084a0a4affb7f4998c5,

title = "Transient perturbation growth of vortex rings",

abstract = "Perturbations to a vortex ring with largest transient energy growth are calculated and applied to drive the vortex ring to evolve. Optimal initial perturbations appear at azimuthal wave numbers β = 0 and β = 9. The former was described as 'axial flow' and is not related to the breakdown of the ring, while the latter is critical to the ring breakdown process as observed in previous direct numerical simulation (DNS) with random initial noise input. In the present work, DNS is conducted to study the nonlinear development of the optimal perturbations, and good agreement with past studies is achieved.",

author = "Fei Chen and Bofu Wang and Daniel Wacks and Daniel Cabezon and Xuerui Mao",

year = "2016",

month = oct,

day = "3",

doi = "10.1088/1742-6596/753/3/032049",

language = "English",

volume = "753",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "3",

note = "Science of Making Torque from Wind, TORQUE 2016 ; Conference date: 05-10-2016 Through 07-10-2016",

}

TY - JOUR

T1 - Transient perturbation growth of vortex rings

AU - Chen, Fei

AU - Wang, Bofu

AU - Wacks, Daniel

AU - Cabezon, Daniel

AU - Mao, Xuerui

PY - 2016/10/3

Y1 - 2016/10/3

N2 - Perturbations to a vortex ring with largest transient energy growth are calculated and applied to drive the vortex ring to evolve. Optimal initial perturbations appear at azimuthal wave numbers β = 0 and β = 9. The former was described as 'axial flow' and is not related to the breakdown of the ring, while the latter is critical to the ring breakdown process as observed in previous direct numerical simulation (DNS) with random initial noise input. In the present work, DNS is conducted to study the nonlinear development of the optimal perturbations, and good agreement with past studies is achieved.

AB - Perturbations to a vortex ring with largest transient energy growth are calculated and applied to drive the vortex ring to evolve. Optimal initial perturbations appear at azimuthal wave numbers β = 0 and β = 9. The former was described as 'axial flow' and is not related to the breakdown of the ring, while the latter is critical to the ring breakdown process as observed in previous direct numerical simulation (DNS) with random initial noise input. In the present work, DNS is conducted to study the nonlinear development of the optimal perturbations, and good agreement with past studies is achieved.

UR - http://www.scopus.com/inward/record.url?scp=84995468299&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/753/3/032049

DO - 10.1088/1742-6596/753/3/032049

M3 - Conference article

AN - SCOPUS:84995468299

SN - 1742-6588

VL - 753

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 3

M1 - 032049

T2 - Science of Making Torque from Wind, TORQUE 2016

Y2 - 5 October 2016 through 7 October 2016

ER -

Transient perturbation growth of vortex rings

Abstract

Access to Document

Other files and links

Fingerprint

Cite this