Numerical modelling of droplet break-up for gas atomisation
Numerical modelling of droplet break-up for gas atomisation
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-updynamics are described in details according to the droplet input parameters.
gas atomisation, metal powder, break-up, melt, numerical model
282-292
Zeoli, Nicola
4bc721f7-a3f7-4e94-b239-6e856e85b1d4
Gu, Sai
855fb2a2-a09f-47ce-b8ec-fb92f8f65a19
December 2008
Zeoli, Nicola
4bc721f7-a3f7-4e94-b239-6e856e85b1d4
Gu, Sai
855fb2a2-a09f-47ce-b8ec-fb92f8f65a19
Zeoli, Nicola and Gu, Sai
(2008)
Numerical modelling of droplet break-up for gas atomisation.
Computational Materials Science, 38 (2), .
(doi:10.1016/j.commatsci.2006.02.012).
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-updynamics are described in details according to the droplet input parameters.
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Published date: December 2008
Keywords:
gas atomisation, metal powder, break-up, melt, numerical model
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 49353
URI: http://eprints.soton.ac.uk/id/eprint/49353
ISSN: 0927-0256
PURE UUID: 8292003c-e220-4af4-8439-2aeaa431535a
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Date deposited: 01 Nov 2007
Last modified: 15 Mar 2024 09:55
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Contributors
Author:
Nicola Zeoli
Author:
Sai Gu
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