Effect of geometric parameters in close-coupled gas atomization: Numerical study

Franz Hernandez, Jordan Tiarks, Emma White, Trevor Riedemann, David Byrd, Bo Kong, Iver E. Anderson, Thomas Ward, Jonathan D. Regele

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The performance of close-coupled gas atomization of liquid metals depends on flow conditions, geometry, and fluid properties. Two important parameters influencing particle size distribution are the gas-to-liquid mass and momentum flux ratios. The gas-to-liquid coupling is inherently linked to the atomization gas die design (with discrete jets) and melt pour-tube tip geometry. Therefore, a better understanding of coupled flow and geometric effects can impact the criteria employed in die and pour-tube tip design. We have explored numerically the effect of parameters, e.g., gas die dimensions and apex angle, on the gas flow and particle size distributions for fixed molten aluminum and nitrogen gas flow conditions. These parameters affect the efficiency of close-coupled gas atomization. Conditions of high coupling tend to reduce particle sizes. This study employs a multiphase compressible 5-equation model in two dimensions (Cartesian).

Original languageEnglish
Title of host publicationAdvances in Powder Metallurgy and Particulate Materials - 2019
Subtitle of host publicationProceedings of the 2019 International Conference on Powder Metallurgy and Particulate Materials
PublisherMetal Powder Industries Federation
Pages13-29
Number of pages17
ISBN (Electronic)9781943694211
StatePublished - 2020
Externally publishedYes
Event2019 International Conference on Powder Metallurgy and Particulate Materials, POWDERMET 2019 - Phoenix, United States
Duration: 23 Jun 201926 Jun 2019

Publication series

NameAdvances in Powder Metallurgy and Particulate Materials - 2019: Proceedings of the 2019 International Conference on Powder Metallurgy and Particulate Materials

Conference

Conference2019 International Conference on Powder Metallurgy and Particulate Materials, POWDERMET 2019
CountryUnited States
CityPhoenix
Period23/06/1926/06/19

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