Analysis of viscous fluid flow in a pressure-swirl atomizer using large-eddy simulation

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Analysis of viscous fluid flow in a pressure-swirl atomizer using large-eddy simulation. / Laurila, E.; Roenby, J.; Maakala, V.; Peltonen, P.; Kahila, H.; Vuorinen, V.

In: INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, Vol. 113, 01.04.2019, p. 371-388.

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@article{90ab256a4da042fa9a4ee37700c8fa25,
title = "Analysis of viscous fluid flow in a pressure-swirl atomizer using large-eddy simulation",
abstract = "A computational fluid dynamics study is carried out on the inner nozzle flow and onset of liquid sheet instability in a large-scale pressure-swirl atomizer with asymmetric inflow configuration for high viscosity fluids. Large-eddy simulations (LES) of the two-phase flow indicate the unsteady flow character inside the nozzle and its influence on liquid sheet formation. A novel geometric volume-of-fluid (VOF) method by Roenby et al. (2016), termed isoAdvector, is applied for sharp interface capturing. We carry out a Reynolds number sweep (420 ≤ Re ≤ 5300) in order to investigate the link between the asymmetric inner nozzle flow and liquid sheet characteristics in laminar, transitional and fully turbulent conditions. Inside the nozzle, the numerical simulations reveal counter-rotating Dean vortices, flow impingement locations, and strong asymmetric flow features at all investigated Reynolds numbers. A helical, rotating gaseous core is observed when Re ≥ 1660. For laminar flow (Re=420), an S-shaped liquid film is observed, while the gas core presence at Re ≥ 1660 results in a hollow cone liquid sheet. For the intermediate value Re=830, the numerical simulations indicate a liquid sheet of mixed type. Consequences of the inflow asymmetry and Reynolds number to the uniformity of the injected liquid mass distribution and liquid sheet instability are pointed out.",
keywords = "Hollow cone spray, isoAdvector, Large-eddy simulation, LES, Pressure-swirl atomizer, Primary atomization, Two-phase flow, VOF, Volume-of-fluid method",
author = "E. Laurila and J. Roenby and V. Maakala and P. Peltonen and H. Kahila and V. Vuorinen",
year = "2019",
month = "4",
day = "1",
doi = "10.1016/j.ijmultiphaseflow.2018.10.008",
language = "English",
volume = "113",
pages = "371--388",
journal = "INTERNATIONAL JOURNAL OF MULTIPHASE FLOW",
issn = "0301-9322",
publisher = "Elsevier BV",

}

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TY - JOUR

T1 - Analysis of viscous fluid flow in a pressure-swirl atomizer using large-eddy simulation

AU - Laurila, E.

AU - Roenby, J.

AU - Maakala, V.

AU - Peltonen, P.

AU - Kahila, H.

AU - Vuorinen, V.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - A computational fluid dynamics study is carried out on the inner nozzle flow and onset of liquid sheet instability in a large-scale pressure-swirl atomizer with asymmetric inflow configuration for high viscosity fluids. Large-eddy simulations (LES) of the two-phase flow indicate the unsteady flow character inside the nozzle and its influence on liquid sheet formation. A novel geometric volume-of-fluid (VOF) method by Roenby et al. (2016), termed isoAdvector, is applied for sharp interface capturing. We carry out a Reynolds number sweep (420 ≤ Re ≤ 5300) in order to investigate the link between the asymmetric inner nozzle flow and liquid sheet characteristics in laminar, transitional and fully turbulent conditions. Inside the nozzle, the numerical simulations reveal counter-rotating Dean vortices, flow impingement locations, and strong asymmetric flow features at all investigated Reynolds numbers. A helical, rotating gaseous core is observed when Re ≥ 1660. For laminar flow (Re=420), an S-shaped liquid film is observed, while the gas core presence at Re ≥ 1660 results in a hollow cone liquid sheet. For the intermediate value Re=830, the numerical simulations indicate a liquid sheet of mixed type. Consequences of the inflow asymmetry and Reynolds number to the uniformity of the injected liquid mass distribution and liquid sheet instability are pointed out.

AB - A computational fluid dynamics study is carried out on the inner nozzle flow and onset of liquid sheet instability in a large-scale pressure-swirl atomizer with asymmetric inflow configuration for high viscosity fluids. Large-eddy simulations (LES) of the two-phase flow indicate the unsteady flow character inside the nozzle and its influence on liquid sheet formation. A novel geometric volume-of-fluid (VOF) method by Roenby et al. (2016), termed isoAdvector, is applied for sharp interface capturing. We carry out a Reynolds number sweep (420 ≤ Re ≤ 5300) in order to investigate the link between the asymmetric inner nozzle flow and liquid sheet characteristics in laminar, transitional and fully turbulent conditions. Inside the nozzle, the numerical simulations reveal counter-rotating Dean vortices, flow impingement locations, and strong asymmetric flow features at all investigated Reynolds numbers. A helical, rotating gaseous core is observed when Re ≥ 1660. For laminar flow (Re=420), an S-shaped liquid film is observed, while the gas core presence at Re ≥ 1660 results in a hollow cone liquid sheet. For the intermediate value Re=830, the numerical simulations indicate a liquid sheet of mixed type. Consequences of the inflow asymmetry and Reynolds number to the uniformity of the injected liquid mass distribution and liquid sheet instability are pointed out.

KW - Hollow cone spray

KW - isoAdvector

KW - Large-eddy simulation

KW - LES

KW - Pressure-swirl atomizer

KW - Primary atomization

KW - Two-phase flow

KW - VOF

KW - Volume-of-fluid method

UR - http://www.scopus.com/inward/record.url?scp=85057049563&partnerID=8YFLogxK

U2 - 10.1016/j.ijmultiphaseflow.2018.10.008

DO - 10.1016/j.ijmultiphaseflow.2018.10.008

M3 - Article

VL - 113

SP - 371

EP - 388

JO - INTERNATIONAL JOURNAL OF MULTIPHASE FLOW

JF - INTERNATIONAL JOURNAL OF MULTIPHASE FLOW

SN - 0301-9322

ER -

ID: 30316213