Scaling analysis of momentum and heat transport in gas tungsten arc weld pools

被引:22
|
作者
Chakraborty, S [1 ]
Sarkar, S [1 ]
Dutta, P [1 ]
机构
[1] Indian Inst Sci, Dept Mech Engn, Bangalore 560012, Karnataka, India
关键词
D O I
10.1179/136217102225001322
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A systematic procedure is outlined for scaling analysis of momentum and heat transfer in gas tungsten arc weld pools. With suitable selections of non-dimentionalised parameters, the governing equations coupled with appropriate boundary conditions are first scaled, and the relative significance of various terms appearing in them is analysed accordingly. The analysis is then used to predict the orders of magnitude of some important quantities, such as the velocity scene lit the top surface, velocity boundary layer thickness, maximum temperature increase in the pool, and time required for initiation of melting. Some of the quantities predicted from the scaling analysis can also be used for optimised selection of appropriate grid size and time steps for full numerical simulation of the process. The scaling predictions are finally assessed by comparison with numerical results quoted in the literature, and a good qualitative agreement is observed.
引用
收藏
页码:88 / 94
页数:7
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