Numerical Investigation of Pileup Process in Metal Microdroplet Deposition Manufacture
This paper presents a systematic numerical investigation of the transient transport phenomenon during the pileup of molten metal droplets on the substrate. The physical mechanisms of the pileup process, including the bulk liquid, capillarity effects at the liquid-solid interface, heat transfer, and...
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Online Access: | http://www.mdpi.com/2072-666X/5/4/1429 |
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doaj-e73553766ba84b9f9aba908a3befab172020-11-24T23:27:08ZengMDPI AGMicromachines2072-666X2014-12-01541429144410.3390/mi5041429mi5041429Numerical Investigation of Pileup Process in Metal Microdroplet Deposition ManufactureJun Du0Zhengying Wei1Zhen Chen2Suli Li3Yiping Tang4State Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaThis paper presents a systematic numerical investigation of the transient transport phenomenon during the pileup of molten metal droplets on the substrate. The physical mechanisms of the pileup process, including the bulk liquid, capillarity effects at the liquid-solid interface, heat transfer, and solidification, are identified and quantified numerically. The droplet diameter is 100 μm, and the impact velocities are 1–3 m/s. These conditions correspond to Re = O(100), We = O(1). The initial substrate temperature is 350 K. The initial droplet temperature of aluminum alloy molten droplets is 960 K. The numerical models are validated with experiments. The comparison between numerical simulations and experimental findings shows a good agreement. The effects of impacting velocity and relative distances between two successive molten droplets on the end-shapes of impact regime are examined. This investigation is essential to implement effective process control in metal microdroplet deposition manufacture.http://www.mdpi.com/2072-666X/5/4/1429pileupdropletend-shapesmetal microdroplet deposition manufacture |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jun Du Zhengying Wei Zhen Chen Suli Li Yiping Tang |
spellingShingle |
Jun Du Zhengying Wei Zhen Chen Suli Li Yiping Tang Numerical Investigation of Pileup Process in Metal Microdroplet Deposition Manufacture Micromachines pileup droplet end-shapes metal microdroplet deposition manufacture |
author_facet |
Jun Du Zhengying Wei Zhen Chen Suli Li Yiping Tang |
author_sort |
Jun Du |
title |
Numerical Investigation of Pileup Process in Metal Microdroplet Deposition Manufacture |
title_short |
Numerical Investigation of Pileup Process in Metal Microdroplet Deposition Manufacture |
title_full |
Numerical Investigation of Pileup Process in Metal Microdroplet Deposition Manufacture |
title_fullStr |
Numerical Investigation of Pileup Process in Metal Microdroplet Deposition Manufacture |
title_full_unstemmed |
Numerical Investigation of Pileup Process in Metal Microdroplet Deposition Manufacture |
title_sort |
numerical investigation of pileup process in metal microdroplet deposition manufacture |
publisher |
MDPI AG |
series |
Micromachines |
issn |
2072-666X |
publishDate |
2014-12-01 |
description |
This paper presents a systematic numerical investigation of the transient transport phenomenon during the pileup of molten metal droplets on the substrate. The physical mechanisms of the pileup process, including the bulk liquid, capillarity effects at the liquid-solid interface, heat transfer, and solidification, are identified and quantified numerically. The droplet diameter is 100 μm, and the impact velocities are 1–3 m/s. These conditions correspond to Re = O(100), We = O(1). The initial substrate temperature is 350 K. The initial droplet temperature of aluminum alloy molten droplets is 960 K. The numerical models are validated with experiments. The comparison between numerical simulations and experimental findings shows a good agreement. The effects of impacting velocity and relative distances between two successive molten droplets on the end-shapes of impact regime are examined. This investigation is essential to implement effective process control in metal microdroplet deposition manufacture. |
topic |
pileup droplet end-shapes metal microdroplet deposition manufacture |
url |
http://www.mdpi.com/2072-666X/5/4/1429 |
work_keys_str_mv |
AT jundu numericalinvestigationofpileupprocessinmetalmicrodropletdepositionmanufacture AT zhengyingwei numericalinvestigationofpileupprocessinmetalmicrodropletdepositionmanufacture AT zhenchen numericalinvestigationofpileupprocessinmetalmicrodropletdepositionmanufacture AT sulili numericalinvestigationofpileupprocessinmetalmicrodropletdepositionmanufacture AT yipingtang numericalinvestigationofpileupprocessinmetalmicrodropletdepositionmanufacture |
_version_ |
1725553286215368704 |