Numerical Simulation of Fluid Flow Caused by Buoyancy Forces During Vacuum Arc Remelting Process

The metallurgical structure and composition of ingots which depend critically on the fluid motion within the molten pool during the vacuum arc remelting （VAR） process have important effect on the subsequent mechanical processes like forging, rolling and welding. In order to determine the fluid motio...

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Published inShanghai jiao tong da xue xue bao Vol. 16; no. 3; pp. 272 - 276
Main Author 赵小花 李金山 杨治军 寇宏超 胡锐 周廉
Format Journal Article
LanguageEnglish
Published Heidelberg Shanghai Jiaotong University Press 01.06.2011
Subjects
Architecture
Buoyancy
Computational fluid dynamics
Computer Science
Electrical Engineering
Engineering
Fluid flow
Fluids
Life Sciences
Materials Science
Pools
Turbulence
Turbulent flow
Vacuum arc melting
fluid flow
buoyancy force
vacuum arc remelting (VAR)
numerical simulation
TG 146.4
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Summary:The metallurgical structure and composition of ingots which depend critically on the fluid motion within the molten pool during the vacuum arc remelting （VAR） process have important effect on the subsequent mechanical processes like forging, rolling and welding. In order to determine the fluid motion of molten pool, a 2D finite element model is established using ANSYS10.0 software, combined with the turbulent fluid flow and heat transfer. The fluid motion caused by thermo buoyancy forces is investigated at different VAR processes in the present study. The results indicate that the fluid flows symmetrically along the axis of the molten pool and eloekwisely along the circle at the right pool＇s profile. It is also shown that the maximum velocity increases with increasing melting rate and a direct proportional relationship exists.
Bibliography:31-1943/U
ZHAO Xiao-hua, LI Jin-shan, YANG Zhi-jun KOU Hong-chao, HU Rui, ZHOU Lian （State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072, China）
The metallurgical structure and composition of ingots which depend critically on the fluid motion within the molten pool during the vacuum arc remelting （VAR） process have important effect on the subsequent mechanical processes like forging, rolling and welding. In order to determine the fluid motion of molten pool, a 2D finite element model is established using ANSYS10.0 software, combined with the turbulent fluid flow and heat transfer. The fluid motion caused by thermo buoyancy forces is investigated at different VAR processes in the present study. The results indicate that the fluid flows symmetrically along the axis of the molten pool and eloekwisely along the circle at the right pool＇s profile. It is also shown that the maximum velocity increases with increasing melting rate and a direct proportional relationship exists.
vacuum arc remelting （VAR）, fluid flow, buoyancy force, numerical simulation
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-011-1142-3