摘要：The lattice Boltzmann method (LBM) is first applied to both simulate and analyze the heat transfer and fluid flow with phase change in a workpiece of stationary plasma arc welding (PAW). The heating and key-holing effects are considered with a modified heat source model. The total enthalpy lattice Boltzmann model is employed to investigate the phase change process in the weld pool. The predicted weld pool geometry agrees well with the experimental results and average relative errors remain below 12%. It seems that LBM is more intuitive to display the fluid flow in the weld pool, e.g. circulations, than the finite volume method. However, the effect of fluid flow on the PAW process is indicated to be non-negligible, and particularly responsible for the upper shape of the weld pool. Mechanisms of the formation of the hump in the fusion line are further analyzed from the perspective of fluid motion. Finally, the sulfur activity of workpiece and welding current is discussed, showing that sulfur activity only affects pool geometry. High welding current accelerates the penetration with low time consumption and high energy efficiency; however, the optimum current is a better choice to ensure high weld quality.
© 2017 Elsevier Masson SAS

ISSN号：1290-0729

卷、期、页：v 124,p447-458

发表日期：2018-02-01

期刊分区（SCI为中科院分区）：二区

收录情况：SCIE（科学引文索引网络版）,ESI（基本科学指标数据库）,EI（工程索引）

发表期刊名称：International Journal of Thermal Sciences

参与作者：蔡峻杰,冯妍卉,周俊杰,张欣欣,武传松

第一作者：李岩

论文类型：期刊论文

论文概要：蔡峻杰,冯妍卉,周俊杰,李岩,张欣欣,武传松，Numerical analysis of weld pool behaviors in plasma arc welding with the lattice Boltzmann method，International Journal of Thermal Sciences，2018，v 124,p447-458

论文题目：Numerical analysis of weld pool behaviors in plasma arc welding with the lattice Boltzmann method