Interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model

Due to the high efficiency and low cost, gas atomization (GA) has been widely applied to produce metal powders. In this paper, the GA process is first modeled by combining the volume of fluid (VOF) model with dynamic adaptive mesh and the discrete phase model (DPM) to simulate the formation of the p...

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Autores principales:	Sheng Luo, Hongze Wang, Zhenyang Gao, Yi Wu, Haowei Wang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Gas atomization Powder defect Volume of fluid Discrete phase model Additive manufacturing Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/d90c8a661ac84548975729142fc28854
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spelling	oai:doaj.org-article:d90c8a661ac84548975729142fc288542021-11-26T04:23:57ZInteraction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model0264-127510.1016/j.matdes.2021.110264https://doaj.org/article/d90c8a661ac84548975729142fc288542021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521008194https://doaj.org/toc/0264-1275Due to the high efficiency and low cost, gas atomization (GA) has been widely applied to produce metal powders. In this paper, the GA process is first modeled by combining the volume of fluid (VOF) model with dynamic adaptive mesh and the discrete phase model (DPM) to simulate the formation of the powders and the evolution of the defects. Simulation results show that the Kelvin-Helmholtz instability in the primary atomization and the membranous droplet breakup and closure in secondary atomization can form the hollow powder. While the presence of the satellite powder is caused by the collisions between the large and small droplets with different velocities. Moreover, the irregular powder is produced when the drag force is not enough to separate the droplets but deforms them. The estimated morphology and size distribution of the particles have a good agreement with the experimental ones. Finally, the possible measures to reduce the defects of the powders have been put forward based on the revealed mechanism of defect evolution. This work provides a deep simulation insight into the GA process, towards producing high-quality metal powders for additive manufacturing on a large scale.Sheng LuoHongze WangZhenyang GaoYi WuHaowei WangElsevierarticleGas atomizationPowder defectVolume of fluidDiscrete phase modelAdditive manufacturingMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110264- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Gas atomization Powder defect Volume of fluid Discrete phase model Additive manufacturing Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Gas atomization Powder defect Volume of fluid Discrete phase model Additive manufacturing Materials of engineering and construction. Mechanics of materials TA401-492 Sheng Luo Hongze Wang Zhenyang Gao Yi Wu Haowei Wang Interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model
description	Due to the high efficiency and low cost, gas atomization (GA) has been widely applied to produce metal powders. In this paper, the GA process is first modeled by combining the volume of fluid (VOF) model with dynamic adaptive mesh and the discrete phase model (DPM) to simulate the formation of the powders and the evolution of the defects. Simulation results show that the Kelvin-Helmholtz instability in the primary atomization and the membranous droplet breakup and closure in secondary atomization can form the hollow powder. While the presence of the satellite powder is caused by the collisions between the large and small droplets with different velocities. Moreover, the irregular powder is produced when the drag force is not enough to separate the droplets but deforms them. The estimated morphology and size distribution of the particles have a good agreement with the experimental ones. Finally, the possible measures to reduce the defects of the powders have been put forward based on the revealed mechanism of defect evolution. This work provides a deep simulation insight into the GA process, towards producing high-quality metal powders for additive manufacturing on a large scale.
format	article
author	Sheng Luo Hongze Wang Zhenyang Gao Yi Wu Haowei Wang
author_facet	Sheng Luo Hongze Wang Zhenyang Gao Yi Wu Haowei Wang
author_sort	Sheng Luo
title	Interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model
title_short	Interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model
title_full	Interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model
title_fullStr	Interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model
title_full_unstemmed	Interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model
title_sort	interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d90c8a661ac84548975729142fc28854
work_keys_str_mv	AT shengluo interactionbetweenhighvelocitygasandliquidingasatomizationrevealedbyanewcoupledsimulationmodel AT hongzewang interactionbetweenhighvelocitygasandliquidingasatomizationrevealedbyanewcoupledsimulationmodel AT zhenyanggao interactionbetweenhighvelocitygasandliquidingasatomizationrevealedbyanewcoupledsimulationmodel AT yiwu interactionbetweenhighvelocitygasandliquidingasatomizationrevealedbyanewcoupledsimulationmodel AT haoweiwang interactionbetweenhighvelocitygasandliquidingasatomizationrevealedbyanewcoupledsimulationmodel
_version_	1718409932832768000

Interaction between high-velocity gas and liquid in gas atomization revealed by a new coupled simulation model

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