Numerical investigation for dominant factors in slag transfer and deposition process during metal active gas welding using incompressible smoothed particle hydrodynamics method
Numerical investigation for dominant factors in slag transfer and deposition process during metal active gas welding using incompressible smoothed particle hydrodynamics method
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不可压缩平滑颗粒流体动力学方法数值研究金属活性气体保护焊渣转移和沉积过程的主导因素
DOI：
10.1080/09507116.2022.2059147
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发表时间：
2022
影响因子：
--
通讯作者：
Manabu Tanaka & Anthony Bruce Murphy
中科院分区：
文献类型：
--
作者：
Takamasa Fukazawa;Keigo Tanaka;Hisaya Komen;Masaya Shigeta;Manabu Tanaka & Anthony Bruce Murphy
采用不可压缩光滑粒子流体动力学方法对活性气体保护焊中的熔渣过渡和沉积过程进行了数值模拟，并考虑了保护气体流动对熔池表面熔渣漂浮的影响。结果表明，热源中心附近熔池表面产生的熔渣向熔池边缘转移，这与实验结果相似。熔渣停留在熔池的尾部区域，然后沉积在焊缝上。这些模拟行为支持了目前的计算结果的有效性。为了确定焊池上的熔渣行为的主导因素，进行了数值实验，单独作用的力，由于马兰戈尼效应，剪切力，洛伦兹力，和保护气流的阻力。计算结果表明，在热源中心附近，保护气体产生的剪切力和阻力占主导地位，熔渣从热源附近向熔池末端转移。另一方面，澄清了由于Marangoni效应而产生的力在焊接熔池的尾部区域中占主导地位，因此熔渣从那里转移到焊接方向上的前部区域。
Numerical simulation based on an incompressible smoothed particle hydrodynamics method was performed to clarify dominant factors of slag transfer and deposition processes in a metal active gas welding with a computational model which considered the effects of a shielding gas flow on a slag floating on a weld pool surface. As a result, the slags generated on the weld pool surface near the center of a heat source were transferred to the edge of the pool, which was similar to an experiment result. The slags stayed at the trailing region of the pool and then deposited on a weld bead. These simulated behaviors supported the validity of the present computational result. In order to identify the dominant factors of the slag behavior on the weld pool, numerical experiments were conducted with individually acting the forces due to the Marangoni effect, the shearing force, the Lorentz force, and the drag by the shielding gas flow. From the computational results, it was suggested that the shearing force and the drag due to the shielding gas were dominant near the center of the heat source, and the slag was transferred from the vicinity of the heat source to the end of the weld pool. On the other hand, it was clarified that the force due to the Marangoni effect was dominant in the trailing region of the weld pool, and consequently the slag was transferred from there to the front region in the welding direction.
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10.1299/kikaib.73.1167
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DOI：
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DOI：
10.2207/jjws.77.152
发表时间：
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期刊：
Quarterly Journal of The Japan Welding Society
影响因子：
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作者：
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DOI：
10.1016/j.icheatmasstransfer.2021.105243
发表时间：
2021-05-26
影响因子：
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作者：
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