Share Email Print
cover

Proceedings Paper • new

Liquid bridge simulation of metal-wire laser additive manufacturing in microgravity environment
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Unstable thermocapillary convection in metal liquid bridge is a typical phenomenon during the laser metal-wire additive manufacturing process in microgravity environment. The evolution and dynamic mechanism of the liquid bridge will influence the manufacturing process and quality for the forthcoming on-orbit space metal additive manufacturing. Therefore, it is very important to investigate the evolution and instability of thermocapillary convection in liquid bridges in microgravity. In present investigation, a numerical model is developed to reveal the characteristics of thermocapillary convection. The effects of aspect ratio and gravity on the critical Reynolds number for convection instability of thermocapillary convection in metal (Ti6Al4V) liquid bridge are investigated numerically. The results indicate that the critical Reynolds number for convection instability decreases with the increase of aspect ratio number at first, and then increases both in the gravity or microgravity environment. The numerical results also reveal that the critical Reynolds number for convection instability under gravity environment with natural convection in metal liquid bridge is larger than microgravity environment. The research shows that the influence of microgravity leads to a distinctly different behaviour of thermocapillary convection in metal liquid bridge compared to the gravity environment. A more comprehensive study will be conducted to cover the parameter space more systematically to identify the factors which significantly influence the stability of the thermocapillary convection in metal liquid bridge under microgravity environment, which is important for the on-orbit space metal additive manufacturing.

Paper Details

Date Published: 6 February 2019
PDF: 6 pages
Proc. SPIE 10842, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Subdiffraction-limited Plasmonic Lithography and Innovative Manufacturing Technology, 108420O (6 February 2019); doi: 10.1117/12.2516519
Show Author Affiliations
Haiqiong Xie, Chongqing Institute of Green and Intelligent Technology (China)
Chongqing Key Lab. of Additive Manufacturing Technology and Systems (China)
Chongqing Univ. of Posts and Telecommunications (China)
Xuanming Duan, Chongqing Institute of Green and Intelligent Technology (China)
Chongqing Key Lab. of Additive Manufacturing Technology and Systems (China)
Guoyu Wang, Chongqing Institute of Green and Intelligent Technology (China)
Chongqing Key Lab. of Additive Manufacturing and Systems (China)
Shuqian Fan, Chongqing Institute of Green and Intelligent Technology (China)
Chongqing Key Lab. of Additive Manufacturing Technology and Systems (China)
Xueping Ding, Chongqing Institute of Green and Intelligent Technology (China)
Chongqing Key Lab. of Additive Manufacturing Technology and Systems (China)


Published in SPIE Proceedings Vol. 10842:
9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Subdiffraction-limited Plasmonic Lithography and Innovative Manufacturing Technology
Mingbo Pu; Xiong Li; Xiaoliang Ma; Rui Zhou; Xuanming Duan; Xiangang Luo, Editor(s)

© SPIE. Terms of Use
Back to Top