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Numerical investigation of a perturbed swirling annular two-phase jet

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Numerical investigation of a perturbed swirling annular two-phase jet. / Siamas, George A.; Jiang, Xi; Wrobel, Luiz C.

In: International Journal of Heat and Fluid Flow, Vol. 30, No. 3, 06.2009, p. 481-493.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Siamas, GA, Jiang, X & Wrobel, LC 2009, 'Numerical investigation of a perturbed swirling annular two-phase jet', International Journal of Heat and Fluid Flow, vol. 30, no. 3, pp. 481-493. https://doi.org/10.1016/j.ijheatfluidflow.2009.02.020

APA

Siamas, G. A., Jiang, X., & Wrobel, L. C. (2009). Numerical investigation of a perturbed swirling annular two-phase jet. International Journal of Heat and Fluid Flow, 30(3), 481-493. https://doi.org/10.1016/j.ijheatfluidflow.2009.02.020

Vancouver

Siamas GA, Jiang X, Wrobel LC. Numerical investigation of a perturbed swirling annular two-phase jet. International Journal of Heat and Fluid Flow. 2009 Jun;30(3):481-493. https://doi.org/10.1016/j.ijheatfluidflow.2009.02.020

Author

Siamas, George A. ; Jiang, Xi ; Wrobel, Luiz C. / Numerical investigation of a perturbed swirling annular two-phase jet. In: International Journal of Heat and Fluid Flow. 2009 ; Vol. 30, No. 3. pp. 481-493.

Bibtex

@article{80d65e0c654f46acbda0f2d309637f97,
title = "Numerical investigation of a perturbed swirling annular two-phase jet",
abstract = "A swirling annular gas-liquid two-phase jet flow system has been investigated by solving the compressible, time-dependent, non-dimensional Navier-Stokes equations using highly accurate numerical methods. The mathematical formulation for the flow system is based on an Eulerian approach with mixed-fluid treatment while an adjusted volume of fluid method is utilised to account for the gas compressibility. Surface tension effects are captured by a continuum surface force model. Swirling motion is applied at the inlet while a small helical perturbation is also applied to initiate the instability. Three-dimensional spatial direct numerical simulation has been performed with parallelisation of the code based on domain decomposition. The results show that the flow is characterised by a geometrical recirculation zone adjacent to the nozzle exit and by a central recirculation zone further downstream. Swirl enhances the flow instability and vorticity and promotes liquid dispersion in the cross-stream wise directions. A dynamic precessing vortex core is developed demonstrating that the growth of such a vortex in annular configurations can be initiated even at low swirl numbers, in agreement with experimental findings. Analysis of the averaged results revealed the existence of a geometrical recirculation zone and a swirl induced central recirculation zone in the flow field.",
keywords = "Direct numerical simulation, Two-phase, Jet, Swirl, Perturbation, Annular, PRECESSING VORTEX CORE, COHERENT STRUCTURES, INFLOW CONDITIONS, LIQUID SHEET, SIMULATION, FLOW, DYNAMICS, RECIRCULATION, TURBULENCE, INTERFACE",
author = "Siamas, {George A.} and Xi Jiang and Wrobel, {Luiz C.}",
year = "2009",
month = jun,
doi = "10.1016/j.ijheatfluidflow.2009.02.020",
language = "English",
volume = "30",
pages = "481--493",
journal = "International Journal of Heat and Fluid Flow",
issn = "0142-727X",
publisher = "Elsevier",
number = "3",

}

RIS

TY - JOUR

T1 - Numerical investigation of a perturbed swirling annular two-phase jet

AU - Siamas, George A.

AU - Jiang, Xi

AU - Wrobel, Luiz C.

PY - 2009/6

Y1 - 2009/6

N2 - A swirling annular gas-liquid two-phase jet flow system has been investigated by solving the compressible, time-dependent, non-dimensional Navier-Stokes equations using highly accurate numerical methods. The mathematical formulation for the flow system is based on an Eulerian approach with mixed-fluid treatment while an adjusted volume of fluid method is utilised to account for the gas compressibility. Surface tension effects are captured by a continuum surface force model. Swirling motion is applied at the inlet while a small helical perturbation is also applied to initiate the instability. Three-dimensional spatial direct numerical simulation has been performed with parallelisation of the code based on domain decomposition. The results show that the flow is characterised by a geometrical recirculation zone adjacent to the nozzle exit and by a central recirculation zone further downstream. Swirl enhances the flow instability and vorticity and promotes liquid dispersion in the cross-stream wise directions. A dynamic precessing vortex core is developed demonstrating that the growth of such a vortex in annular configurations can be initiated even at low swirl numbers, in agreement with experimental findings. Analysis of the averaged results revealed the existence of a geometrical recirculation zone and a swirl induced central recirculation zone in the flow field.

AB - A swirling annular gas-liquid two-phase jet flow system has been investigated by solving the compressible, time-dependent, non-dimensional Navier-Stokes equations using highly accurate numerical methods. The mathematical formulation for the flow system is based on an Eulerian approach with mixed-fluid treatment while an adjusted volume of fluid method is utilised to account for the gas compressibility. Surface tension effects are captured by a continuum surface force model. Swirling motion is applied at the inlet while a small helical perturbation is also applied to initiate the instability. Three-dimensional spatial direct numerical simulation has been performed with parallelisation of the code based on domain decomposition. The results show that the flow is characterised by a geometrical recirculation zone adjacent to the nozzle exit and by a central recirculation zone further downstream. Swirl enhances the flow instability and vorticity and promotes liquid dispersion in the cross-stream wise directions. A dynamic precessing vortex core is developed demonstrating that the growth of such a vortex in annular configurations can be initiated even at low swirl numbers, in agreement with experimental findings. Analysis of the averaged results revealed the existence of a geometrical recirculation zone and a swirl induced central recirculation zone in the flow field.

KW - Direct numerical simulation

KW - Two-phase

KW - Jet

KW - Swirl

KW - Perturbation

KW - Annular

KW - PRECESSING VORTEX CORE

KW - COHERENT STRUCTURES

KW - INFLOW CONDITIONS

KW - LIQUID SHEET

KW - SIMULATION

KW - FLOW

KW - DYNAMICS

KW - RECIRCULATION

KW - TURBULENCE

KW - INTERFACE

U2 - 10.1016/j.ijheatfluidflow.2009.02.020

DO - 10.1016/j.ijheatfluidflow.2009.02.020

M3 - Journal article

VL - 30

SP - 481

EP - 493

JO - International Journal of Heat and Fluid Flow

JF - International Journal of Heat and Fluid Flow

SN - 0142-727X

IS - 3

ER -