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Modeling the in-flight events during metal spray forming

Tinoco, J; Widell, B; Fredriksson, H and Fuchs, Laszlo LU (2004) In Materials Science & Engineering: A 365(1-2). p.302-310
Abstract
In this work, the in-flight events occurring during deposition over a rotating substrate were modeled. The calculations were performed by solving the momentum and enthalpy equations for the gas. A Lagrangian approach was used to obtain the trajectories and thermal history of the droplets. A modified heat capacity model was used to simulate the release of latent heat due to the solidification of the droplets. Turbulent particle dispersion was not considered. The results showed that the droplet temperature strongly depends on the droplet diameter and on its location in the spray since the relative velocity between the gas and the droplets varies largely depending on the location. An estimation of the state of the spray is presented in terms... (More)
In this work, the in-flight events occurring during deposition over a rotating substrate were modeled. The calculations were performed by solving the momentum and enthalpy equations for the gas. A Lagrangian approach was used to obtain the trajectories and thermal history of the droplets. A modified heat capacity model was used to simulate the release of latent heat due to the solidification of the droplets. Turbulent particle dispersion was not considered. The results showed that the droplet temperature strongly depends on the droplet diameter and on its location in the spray since the relative velocity between the gas and the droplets varies largely depending on the location. An estimation of the state of the spray is presented in terms of mass and thermal averages. The results showed that the average fraction of solid obtained in the spray depends on the initial conditions, such as gas temperature and particle size distribution parameters. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
droplet solidification, CFD, spray casting, average solid fraction
in
Materials Science & Engineering: A
volume
365
issue
1-2
pages
302 - 310
publisher
Elsevier
external identifiers
  • wos:000187972000043
  • scopus:0348107288
ISSN
1873-4936
DOI
10.1016/j.msea.2003.09.040
language
English
LU publication?
yes
id
832ccb11-55f8-4314-acba-e255a98ca466 (old id 290020)
date added to LUP
2007-10-26 09:16:06
date last changed
2017-01-01 04:28:52
@article{832ccb11-55f8-4314-acba-e255a98ca466,
  abstract     = {In this work, the in-flight events occurring during deposition over a rotating substrate were modeled. The calculations were performed by solving the momentum and enthalpy equations for the gas. A Lagrangian approach was used to obtain the trajectories and thermal history of the droplets. A modified heat capacity model was used to simulate the release of latent heat due to the solidification of the droplets. Turbulent particle dispersion was not considered. The results showed that the droplet temperature strongly depends on the droplet diameter and on its location in the spray since the relative velocity between the gas and the droplets varies largely depending on the location. An estimation of the state of the spray is presented in terms of mass and thermal averages. The results showed that the average fraction of solid obtained in the spray depends on the initial conditions, such as gas temperature and particle size distribution parameters.},
  author       = {Tinoco, J and Widell, B and Fredriksson, H and Fuchs, Laszlo},
  issn         = {1873-4936},
  keyword      = {droplet solidification,CFD,spray casting,average solid fraction},
  language     = {eng},
  number       = {1-2},
  pages        = {302--310},
  publisher    = {Elsevier},
  series       = {Materials Science & Engineering: A},
  title        = {Modeling the in-flight events during metal spray forming},
  url          = {http://dx.doi.org/10.1016/j.msea.2003.09.040},
  volume       = {365},
  year         = {2004},
}