FE-based Modelling Approaches — Lesson 2

This lesson covers the complex process of metal transfer in gas metal arc welding (GMAW). It delves into the different aspects of the process, such as the creation of an arc, the formation of a molten droplet, and the interaction of the droplet with the workpiece. The lesson also discusses the different domains involved in the process, including the arc domain and the metal domain. It further explains the governing equations used in the modeling approach, such as the continuity equation, momentum conservation equation, and energy conservation equation. The lesson also touches on the role of magnetic fields and electric potentials in the process. An illustrative example is the use of the volume of fluid method to track the moving free surface of the electrode.

Video Highlights

01:41 - Different aspects of the metal transfer model
05:05 - Different types of metal transfer mechanisms
08:57 - Different domains for the modeling approach
27:26 - Governing equations used in the modeling approach

Key Takeaways

- The metal transfer process in GMAW involves the creation of an arc, formation of a molten droplet, and its interaction with the workpiece.
- The process can be divided into different domains, including the arc domain and the metal domain, each requiring different modeling approaches.
- Governing equations such as the continuity equation, momentum conservation equation, and energy conservation equation are used in the modeling approach.
- Magnetic fields and electric potentials play a significant role in the process.
- The volume of fluid method is used to track the moving free surface of the electrode.