Numerical Investigation of Heat Transfer During Submerged Arc Welding Phenomena by Coupled DEM-ISPH Simulation

Hisaya Komen, Masaya Shigeta, Manabu Tanaka, Yohei Abe, Takahiro Fujimoto, Mitsuyoshi Nakatani, Anthony B. Murphy

Research output: Contribution to journalArticlepeer-review

Abstract

Two-dimensional axisymmetric heat source distributions of the arc plasma were obtained by a grid-based simulation. These distributions and a particle-based method that couples the discrete element method (DEM) and incompressible smoothed particle hydrodynamics (ISPH) were then applied to verify the mechanisms of slag and weld pool formation and the thermal effects of flux and slag on the base metal, weld pool and weld bead. The slag and weld pool were simulated together, and their formation and resolidification mechanisms were verified. The velocity fields in the weld pool showed that the transport of high-temperature molten metal from the weld pool surface behind the center of the heat source to the bottom of the weld pool heated the bottom of the weld, leading to deep penetration. It was found that the heat on the metal surface near the heat source was temporarily absorbed by the flux, and the heat was transferred back to the metal surface after the heat source passed. The temperature decrease of the metal surface was also limited by the slag covering the metal surface, leading to a higher surface temperature in submerged arc welding than in gas metal arc welding.

Original languageEnglish
Article number121062
JournalInternational Journal of Heat and Mass Transfer
Volume171
DOIs
Publication statusPublished - 2021 Jun
Externally publishedYes

Keywords

  • Discrete element method
  • Particle method
  • Simulation
  • Slag
  • Submerged arc welding
  • Weld pool

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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