Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Dynamic Analysis of Metal Transfer using VOF Method in GMAW (I) - Globular and Spray Transfer Modes

VOF 방법을 이용한 GMA 용접의 금속 이행에 관한 동적 해석 (I) - 입상 용적과 스프레이 이행 모드의 해석 -

  • 최상균 (한국과학기술원, 기계공학과) ;
  • 유중돈 (한국과학기술원, 기계공학과) ;
  • 김용석 (홍익대학교 금속재료공학과)
  • Published : 1997.06.01
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Abstract

Dynamics of molten drop detachment in the Gas Metal Arc (GMA) welding is investigated using the Volume of Fluid(VOF) method. The electromagnetic effects are included in the formulation of the VOF method which has been widely used to analyze the dynamics of the fluid having a free surface. The molten drop geometry, pressure and velocity profiles within the drop are calculated numerically in the cases of globular and spray transfer modes. It appears that the velocity and current distribution affect metal detachment. It is found that the taper is formed and maintained during the spray transfer by the electromagnetic force. Predicted results show reasonably good agreement with the available experimental data which validates the application of the VOF method to metal transfer analysis.

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References

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