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Consistency Issues of Lagrangian Particle Tracking Applied to a Spray Jet in Crossflow

Salewski, Mirko LU and Fuchs, Laszlo LU (2007) In International Journal of Multiphase Flow 33(4). p.394-410
Abstract
Numerical simulations are performed for multiphase jets in crossflow. The flow solver uses an Eulerian/Lagrangian approach. Turbulence in the gas phase is modeled in the framework of large eddy simulation. The dispersed phase is handled using Lagrangian particle tracking. The model assumptions of solvers for Lagrangian particle tracking are critically assessed for typical flow conditions of spray jets in crossflow. The droplets are assumed to be spherical and isolated. It is shown that several model assumptions are apparently inconsistent in larger portions of the flow field. Firstly, average Weber numbers can be so large that the model assumption to regard droplets as spherical is questionable, not only near the nozzle, but also in the... (More)
Numerical simulations are performed for multiphase jets in crossflow. The flow solver uses an Eulerian/Lagrangian approach. Turbulence in the gas phase is modeled in the framework of large eddy simulation. The dispersed phase is handled using Lagrangian particle tracking. The model assumptions of solvers for Lagrangian particle tracking are critically assessed for typical flow conditions of spray jets in crossflow. The droplets are assumed to be spherical and isolated. It is shown that several model assumptions are apparently inconsistent in larger portions of the flow field. Firstly, average Weber numbers can be so large that the model assumption to regard droplets as spherical is questionable, not only near the nozzle, but also in the far-field. Secondly, the average droplet spacing can be so low that droplets directly interact with each other, again also in the far-field. Thirdly, the average Stokes numbers in the jet region can be so large that the phase coupling between the dispersed and continuous phase is weak. Some remedies to these deficiencies are proposed. (C) 2006 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
phase coupling, droplet deformation, interaction, particle, spray, Euler/Lagrange, Lagrangian particle tracking
in
International Journal of Multiphase Flow
volume
33
issue
4
pages
394 - 410
publisher
Elsevier
external identifiers
  • WOS:000246171600003
  • Scopus:33947200196
ISSN
0301-9322
DOI
10.1016/j.ijmultiphaseflow.2006.09.007
language
English
LU publication?
yes
id
dfbc2c28-b1b8-46c2-976e-27a1ff15231a (old id 572035)
date added to LUP
2007-12-19 12:29:05
date last changed
2016-11-13 04:32:11
@misc{dfbc2c28-b1b8-46c2-976e-27a1ff15231a,
  abstract     = {Numerical simulations are performed for multiphase jets in crossflow. The flow solver uses an Eulerian/Lagrangian approach. Turbulence in the gas phase is modeled in the framework of large eddy simulation. The dispersed phase is handled using Lagrangian particle tracking. The model assumptions of solvers for Lagrangian particle tracking are critically assessed for typical flow conditions of spray jets in crossflow. The droplets are assumed to be spherical and isolated. It is shown that several model assumptions are apparently inconsistent in larger portions of the flow field. Firstly, average Weber numbers can be so large that the model assumption to regard droplets as spherical is questionable, not only near the nozzle, but also in the far-field. Secondly, the average droplet spacing can be so low that droplets directly interact with each other, again also in the far-field. Thirdly, the average Stokes numbers in the jet region can be so large that the phase coupling between the dispersed and continuous phase is weak. Some remedies to these deficiencies are proposed. (C) 2006 Elsevier Ltd. All rights reserved.},
  author       = {Salewski, Mirko and Fuchs, Laszlo},
  issn         = {0301-9322},
  keyword      = {phase coupling,droplet deformation,interaction,particle,spray,Euler/Lagrange,Lagrangian particle tracking},
  language     = {eng},
  number       = {4},
  pages        = {394--410},
  publisher    = {ARRAY(0xb9bed60)},
  series       = {International Journal of Multiphase Flow},
  title        = {Consistency Issues of Lagrangian Particle Tracking Applied to a Spray Jet in Crossflow},
  url          = {http://dx.doi.org/10.1016/j.ijmultiphaseflow.2006.09.007},
  volume       = {33},
  year         = {2007},
}