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	Numerical simulation and experimental verification of droplet transfer behavior in GMAW
	Ding, Xueping1,2; Li, Huan3
	2017
摘要	The droplet transfer in GMAW was simulated based on FLUENT software. A two-dimensional axisymmetric model of droplet transfer was developed considering thermal analysis. The distribution of physical quantities, including temperature, electric potential and heat flux on the workpiece, was investigated at different stages of droplet transfer. The results showed that the maximum arc temperature displayed a periodic trend. It is found that the electrical potential changed with droplet behavior and the current did not flow through the detached droplet. The heat flux decreased from the axis to the boundary and the maximum value occurred at the center. To verify the accuracy of simulated results, the welding experiments were performed. The actual droplet transfer was recorded with high-speed photography while the waveforms of welding current and arc voltage were acquired through LabVIEW signal acquisition system. The comparison showed that the simulated results agreed well with the experimental ones. It was demonstrated that the established mathematic model for droplet transfer was reasonable. © 2017, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
DOI	10.12073/j.hjxb.20160329002
发表期刊	Hanjie Xuebao/Transactions of the China Welding Institution
ISSN	0253360X
卷号	38期号:12页码:73-76 and 113
收录类别	EI
语种	中文