FORMATION OF PARTICLES IN WELDING FUME PLASMAS: NUMERICAL MODELING AND EXPERIMENT

被引：3

作者：

Vishnyakov, V. I. ^{[1
]}

Kiro, S. A.

Oprya, M. V.

Chursina, O. D.

Ennan, A. A.

机构：

[1] Min Edu Sci, Phys Chem Inst Environm & Human Protect, 3 Preobrazhenska Str, UA-65082 Odesa, Ukraine

来源：

UKRAINIAN JOURNAL OF PHYSICS | 2019年 / 64卷 / 05期

关键词：

gas metal arc welding; numerical modeling; particle size distribution; chemical composition; SHIELDING GAS TEMPERATURE; COAGULATION EQUATION; AEROSOL DYNAMICS; DUST GRAINS; SIMULATION; NANOPARTICLES;

D O I：

10.15407/ujpe64.5.392

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Formation of particles in a fume plasma obtained from the gas metal arc welding is investigated by the numerical modeling of the plasma evolution. The model of welding fume plasma evolution includes the following processes: vapor emission from the arc zone and mixing with a shielding gas, plasma formation, nucleation, nucleus growth via the material condensation and coalescence, solidification of liquid droplets into primary particles, and coagulation of primary particles into inhalable particles in the breathing zone. The computed results are compared with experimental data on the specific surface area, chemical composition, and dependence of the particle sizes on the shielding gas temperature.

引用

页码：392 / 405

页数：14

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[1]

[Anonymous], T JWRI

[2] Computer modelling of the plasma chemistry and plasma-based growth mechanisms for nanostructured materials [J].