Numerical Simulations of Molten Breakup Behaviors of a de Laval-Type Nozzle, and the Effects of Atomization Parameters on Particle Size Distribution
In this work, an atomizer with a de Laval-type nozzle is designed and studied by commercial computational fluid dynamics (CFD) software, and the secondary breakup process during atomization is simulated by two-way coupling and the discrete particle model (DPM) using the Euler-Lagrange method. The si...
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doaj-df258f5403984289b758d0a978747ebb2020-11-25T03:39:29ZengMDPI AGProcesses2227-97172020-08-0181027102710.3390/pr8091027Numerical Simulations of Molten Breakup Behaviors of a de Laval-Type Nozzle, and the Effects of Atomization Parameters on Particle Size DistributionLianghui Xu0Xianglin Zhou1Jinghao Li2Yunfei Hu3Hang Qi4Wei Wen5Kaiping Du6Yao Ma7Yueguang Yu8State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Mechanical Engineering, McGill University, Montreal H2A0C3, QC, CanadaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaBeijing General Research Institute of Mining & Metallurgy Technology Group, Beijing 100160, ChinaBeijing General Research Institute of Mining & Metallurgy Technology Group, Beijing 100160, ChinaBeijing General Research Institute of Mining & Metallurgy Technology Group, Beijing 100160, ChinaIn this work, an atomizer with a de Laval-type nozzle is designed and studied by commercial computational fluid dynamics (CFD) software, and the secondary breakup process during atomization is simulated by two-way coupling and the discrete particle model (DPM) using the Euler-Lagrange method. The simulation result demonstrates that the gas flow patterns greatly change with the introduction of liquid droplets, which clearly indicates that the mass loading effect is quite significant as a result of the gas-droplet interactions. An hourglass shape of the cloud of disintegrating molten metal particles is observed by using a stochastic tracking model. Finally, this simulation approach is used for the quantitative evaluation of the effects of altering the atomizing process conditions (gas-to-melt ratio, operating pressure <i>P</i>, and operating gas temperature <i>T</i>) and nozzle geometry (protrusion length <i>h</i>, half-taper angle <i>α</i>, and gas slit nozzle diameter <i>D</i>) on the particle size distribution of the powders produced.https://www.mdpi.com/2227-9717/8/9/1027gas atomizationde Laval-type nozzlediscrete particle modelbreakupparticle size distribution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lianghui Xu Xianglin Zhou Jinghao Li Yunfei Hu Hang Qi Wei Wen Kaiping Du Yao Ma Yueguang Yu |
spellingShingle |
Lianghui Xu Xianglin Zhou Jinghao Li Yunfei Hu Hang Qi Wei Wen Kaiping Du Yao Ma Yueguang Yu Numerical Simulations of Molten Breakup Behaviors of a de Laval-Type Nozzle, and the Effects of Atomization Parameters on Particle Size Distribution Processes gas atomization de Laval-type nozzle discrete particle model breakup particle size distribution |
author_facet |
Lianghui Xu Xianglin Zhou Jinghao Li Yunfei Hu Hang Qi Wei Wen Kaiping Du Yao Ma Yueguang Yu |
author_sort |
Lianghui Xu |
title |
Numerical Simulations of Molten Breakup Behaviors of a de Laval-Type Nozzle, and the Effects of Atomization Parameters on Particle Size Distribution |
title_short |
Numerical Simulations of Molten Breakup Behaviors of a de Laval-Type Nozzle, and the Effects of Atomization Parameters on Particle Size Distribution |
title_full |
Numerical Simulations of Molten Breakup Behaviors of a de Laval-Type Nozzle, and the Effects of Atomization Parameters on Particle Size Distribution |
title_fullStr |
Numerical Simulations of Molten Breakup Behaviors of a de Laval-Type Nozzle, and the Effects of Atomization Parameters on Particle Size Distribution |
title_full_unstemmed |
Numerical Simulations of Molten Breakup Behaviors of a de Laval-Type Nozzle, and the Effects of Atomization Parameters on Particle Size Distribution |
title_sort |
numerical simulations of molten breakup behaviors of a de laval-type nozzle, and the effects of atomization parameters on particle size distribution |
publisher |
MDPI AG |
series |
Processes |
issn |
2227-9717 |
publishDate |
2020-08-01 |
description |
In this work, an atomizer with a de Laval-type nozzle is designed and studied by commercial computational fluid dynamics (CFD) software, and the secondary breakup process during atomization is simulated by two-way coupling and the discrete particle model (DPM) using the Euler-Lagrange method. The simulation result demonstrates that the gas flow patterns greatly change with the introduction of liquid droplets, which clearly indicates that the mass loading effect is quite significant as a result of the gas-droplet interactions. An hourglass shape of the cloud of disintegrating molten metal particles is observed by using a stochastic tracking model. Finally, this simulation approach is used for the quantitative evaluation of the effects of altering the atomizing process conditions (gas-to-melt ratio, operating pressure <i>P</i>, and operating gas temperature <i>T</i>) and nozzle geometry (protrusion length <i>h</i>, half-taper angle <i>α</i>, and gas slit nozzle diameter <i>D</i>) on the particle size distribution of the powders produced. |
topic |
gas atomization de Laval-type nozzle discrete particle model breakup particle size distribution |
url |
https://www.mdpi.com/2227-9717/8/9/1027 |
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