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Numerical investigation of throttle flow under cavitating conditions

Altimira, Mireia LU and Fuchs, Laszlo LU (2015) In International Journal of Multiphase Flow 75. p.124-136
Abstract
The present paper shows the importance of the resolution of large unsteady flow structures in numerical simulations of cavitating flows. Three-dimensional simulations of the flow through a throttle geometry representative for fuel injectors have been performed to characterise the inception and development of cavitation, adopting the implicit Large Eddy Simulation approach. The two-phase flow has been handled by the Volume of Fluid method; whilst the simplified Rayleigh equation has been adopted to handle bubble dynamics. The mathematical model has been solved in the open source C++ toolbox OpenFOAM 2.0.1. Results obtained with the mathematical model are compared with those from RANS-based simulations and validated against experimental... (More)
The present paper shows the importance of the resolution of large unsteady flow structures in numerical simulations of cavitating flows. Three-dimensional simulations of the flow through a throttle geometry representative for fuel injectors have been performed to characterise the inception and development of cavitation, adopting the implicit Large Eddy Simulation approach. The two-phase flow has been handled by the Volume of Fluid method; whilst the simplified Rayleigh equation has been adopted to handle bubble dynamics. The mathematical model has been solved in the open source C++ toolbox OpenFOAM 2.0.1. Results obtained with the mathematical model are compared with those from RANS-based simulations and validated against experimental measurements. The performed Large Eddy Simulations not only are able to reproduce vortex cavitation, but also give further insight into the complex interaction between cavitation and turbulence through the assessment of the different terms of the vorticity equation. (C) 2015 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Multiphase flow, Large eddy simulation, Volume of fluid, Cavitation
in
International Journal of Multiphase Flow
volume
75
pages
124 - 136
publisher
Elsevier
external identifiers
  • wos:000359957800010
  • scopus:84930651478
ISSN
0301-9322
DOI
10.1016/j.ijmultiphaseflow.2015.05.006
language
English
LU publication?
yes
id
86dacec2-34aa-4450-b134-31e1737ff625 (old id 7969254)
date added to LUP
2015-09-23 08:26:14
date last changed
2017-08-06 04:01:46
@article{86dacec2-34aa-4450-b134-31e1737ff625,
  abstract     = {The present paper shows the importance of the resolution of large unsteady flow structures in numerical simulations of cavitating flows. Three-dimensional simulations of the flow through a throttle geometry representative for fuel injectors have been performed to characterise the inception and development of cavitation, adopting the implicit Large Eddy Simulation approach. The two-phase flow has been handled by the Volume of Fluid method; whilst the simplified Rayleigh equation has been adopted to handle bubble dynamics. The mathematical model has been solved in the open source C++ toolbox OpenFOAM 2.0.1. Results obtained with the mathematical model are compared with those from RANS-based simulations and validated against experimental measurements. The performed Large Eddy Simulations not only are able to reproduce vortex cavitation, but also give further insight into the complex interaction between cavitation and turbulence through the assessment of the different terms of the vorticity equation. (C) 2015 Elsevier Ltd. All rights reserved.},
  author       = {Altimira, Mireia and Fuchs, Laszlo},
  issn         = {0301-9322},
  keyword      = {Multiphase flow,Large eddy simulation,Volume of fluid,Cavitation},
  language     = {eng},
  pages        = {124--136},
  publisher    = {Elsevier},
  series       = {International Journal of Multiphase Flow},
  title        = {Numerical investigation of throttle flow under cavitating conditions},
  url          = {http://dx.doi.org/10.1016/j.ijmultiphaseflow.2015.05.006},
  volume       = {75},
  year         = {2015},
}