Incompressible SPH simulation of weld pool convection with molten metal droplets in a GMA welding

Hisaya Komen, Masaya Shigeta, Manabu Tanaka, Yu Fukunishi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


In this study, the convective flow in a weld pool during a GMA welding process was clarified by a numerical simulation using an incompressible smoothed particle hydrodynamics method. The computational domain of this simulation was a two-dimensional vertical section of a base metal along the welding direction in a system whose consumable electrode moved. The simulation revealed that the molten metal droplet fell into the weld pool and generated a wave which travelled backward. When the wave hit the solid bead, it swelled up as it solidified generating a wavy surface, which is observed in actual GMA welding. The flow inside the weld pool was also simulated. Both the height of the formed reinforcement and the depth of the penetration agreed with experimental results, which presented the validity of this simulation.

Original languageEnglish
Pages (from-to)332-340
Number of pages9
JournalYosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society
Issue number4
Publication statusPublished - 2015


  • Finger penetration
  • GMA welding
  • Molten metal droplet
  • SPH method
  • Weld pool convection

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Metals and Alloys


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