Numerical modelling of droplet break-up for gas atomisation

N. Zeoli, S. Gu*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

High-pressure gas atomisation (HPGA) technology has been widely employed as an effective method to produce fine spherical metal powders. The physics of gas atomisation is dominated by rapid momentum and heat transfer between the gas and melt phases, and further complicated by break-up and solidification. A numerical model is developed to simulate the critical droplet break-up during the atomisation. By integration of the droplet break-up model with the flow field generated high-pressure gas nozzle, this numerical model is able to provide quantitative assessment for atomisation process. To verify the model performance, the melt stream is initialized to large droplets varying from 1 to 5 mm diameters and injected into the gas flow field for further fragmentation and the break-up dynamics are described in details according to the droplet input parameters.

Original languageEnglish
Pages (from-to)282-292
Number of pages11
JournalComputational Materials Science
Volume38
Issue number2
DOIs
Publication statusPublished - 1 Dec 2006

Fingerprint

gas atomization
Atomization
Breakup
Numerical Modeling
Droplet
Gases
atomizing
Flow Field
Numerical models
Flow fields
flow distribution
metal powder
Momentum transfer
Powder metals
Solidification
Nozzle
Performance Model
Gas Flow
Fragmentation
Powder

Keywords

  • Break-up
  • Gas atomisation
  • Melt
  • Metal powder
  • Numerical model

Cite this

Zeoli, N. ; Gu, S. / Numerical modelling of droplet break-up for gas atomisation. In: Computational Materials Science. 2006 ; Vol. 38, No. 2. pp. 282-292.
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Numerical modelling of droplet break-up for gas atomisation. / Zeoli, N.; Gu, S.

In: Computational Materials Science, Vol. 38, No. 2, 01.12.2006, p. 282-292.

Research output: Contribution to journalArticle

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T1 - Numerical modelling of droplet break-up for gas atomisation

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AU - Gu, S.

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Y1 - 2006/12/1

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AB - High-pressure gas atomisation (HPGA) technology has been widely employed as an effective method to produce fine spherical metal powders. The physics of gas atomisation is dominated by rapid momentum and heat transfer between the gas and melt phases, and further complicated by break-up and solidification. A numerical model is developed to simulate the critical droplet break-up during the atomisation. By integration of the droplet break-up model with the flow field generated high-pressure gas nozzle, this numerical model is able to provide quantitative assessment for atomisation process. To verify the model performance, the melt stream is initialized to large droplets varying from 1 to 5 mm diameters and injected into the gas flow field for further fragmentation and the break-up dynamics are described in details according to the droplet input parameters.

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