Phase change heat transfer analysis of anisotropic structures with moving heat source using the element-free Galerkin method

Abstract

The computational model of phase change heat transfer analysis for anisotropic structures with moving heat sources is established using the element-free Galerkin method (EFGM), and the accuracy and superiority of the proposed model are verified by experimental results and two butt welding examples of anisotropic plates. The influence of off-angle and thermal conductivity factors on the temperature field, welding pool, and weld seam is investigated. The results show that EFGM temperature and welding pool have higher accuracy compared with the finite element method solutions. It is demonstrated that EFGM has a distinct advantage in the tracing of moving heat sources and dynamic phase interfaces during the butt welding process, whether along straight or complex paths. There is a high-quality welding pool and a uniform temperature in butt welding of anisotropic structures compared with isotropic structures. The increase of thermal conductivity factor can accelerate the phase change process and its reasonable range is suggested to be 2–4. It can reduce the temperature concentration and accelerate the solidification speed of weld seam when the off-angle is enlarged, and its recommended range is 30°–45°.

Keywords:

• Anisotropic structures
• element-free Galerkin method
• moving heat source
• phase change heat transfer
• welding pool

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Data availability statement

The data that support the findings of this study are available upon reasonable request by contact with the corresponding author.

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.

Additional information

Funding

This study is supported by National Natural Science Foundation of China (No. 51975503), Scientific Research Fund of Hunan Provincial Education Department (No. 21B0164), Hunan Province Ordinary University Young Backbone Teacher Training Fund (XJT [2020] No. 43), and Natural Science Foundation of Hunan Province (No. 2020JJ4582), and all the supports are appreciated.