Numerical investigation for dominant factors in slag transfer and deposition process during metal active gas welding using incompressible smoothed particle hydrodynamics method

Fukazawa, Takamasa; Tanaka, Keigo; Komen, Hisaya; Shigeta, Masaya; Tanaka, Manabu; Murphy, Anthony B.

doi:10.2207/qjjws.39.277

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…The values of density, thermal conductivity, specific heat, and temperature gradient in the surface tension coefficient were measured by previous studies [33,34]. For other physical properties, the values used in previous studies [31,35,36] that used SUS304 as the base metal were set.…”

Section: Computational Conditionsmentioning

confidence: 99%

SPH Simulation of Molten Metal Flow Modeling Lava Flow Phenomena with Solidification

Tomita,

Yoshikawa,

Sugimoto

et al. 2024

Dynamics

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Characteristic dynamics in lava flows, such as the formation processes of lava levees, toe-like tips, and overlapped structures, were reproduced successfully through numerical simulation using the smoothed particle hydrodynamics (SPH) method. Since these specific phenomena have a great influence on the flow direction of lava flows, it is indispensable to elucidate them for accurate predictions of areas where lava strikes. At the first step of this study, lava was expressed using a molten metal with known physical properties. The computational results showed that levees and toe-like tips formed at the fringe of the molten metal flowing down on a slope, which appeared for actual lava flows as well. The dynamics of an overlapped structure formation were also simulated successfully; therein, molten metal flowed down, solidified, and changed the surface shape of the slope, and the second molten metal flowed over the changed surface shape. It was concluded that the computational model developed in this study using the SPH method is applicable for simulating and clarifying lava flow phenomena.

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Section: Computational Conditionsmentioning

confidence: 99%

SPH Simulation of Molten Metal Flow Modeling Lava Flow Phenomena with Solidification

Tomita,

Yoshikawa,

Sugimoto

et al. 2024

Dynamics

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“…We have applied this incompressible SPH method to the thermofluid simulations of molten metal flows in several kinds of arc welding processes such as GTA weding, 133,134) GMA welding, [135][136][137][138][139] SA welding, 140,141) and Flux-Cored Arc (FCA) welding. 142) Because this incompressible SPH method offers high adaptability for other types of metal processing, it has also revealed the molten metal formation processes with convective and diffusive heat transports during dissimilar Resistance Spot (RS) welding 143,144) and Electroslag (ES) welding 145) collaborating with the experiments, 146,147) and dross formation during gas cutting.…”

Section: Sph Representationmentioning

confidence: 99%

Progress of computational plasma fluid mechanics

Shigeta

2023

Jpn. J. Appl. Phys.

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This article reviews and discusses the recent progresses of studies with the concept of “Computational plasma fluid mechanics”. Computational demonstrations show that the inhouse simulation codes such as PLASTIPC (PLasma All-Speed Turbulence with Implicit Pressure Code) have captured hydrodynamic instabilities and reproduced flow dynamics in thermal plasma – nonionized gas coexisting systems. A unique method has made it feasible to study collective growth of binary alloy nanoparticles by numerical analysis. SPH (Smoothed Particle Hydrodynamics) method with incompressibility modification has achieved complex behaviors of molten metal involving phase change, flow, heat transport, material mixing, and large deformation during arc welding. It is essential to study thermal plasma processes as comprehensive fluid systems in which hot plasma, cold nonionized gas, and materials coexist. The viewpoint and approaches of fluid mechanics as well as plasma physics are indispensable. Computational study will play a more important role in giving us new and deeper insights.

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Numerical investigation for dominant factors in slag transfer and deposition process during metal active gas welding using incompressible smoothed particle hydrodynamics method

Cited by 2 publications

References 29 publications

SPH Simulation of Molten Metal Flow Modeling Lava Flow Phenomena with Solidification

SPH Simulation of Molten Metal Flow Modeling Lava Flow Phenomena with Solidification

Progress of computational plasma fluid mechanics

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