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

Chakraborty, S. ; Sarkar, S. ; Dutta, P. (2002) Scaling analysis of momentum and heat transport in gas tungsten arc weld pools Science and Technology of Welding and Joining, 7 (2). pp. 88-94. ISSN 1362-1718

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Official URL: http://www.tandfonline.com/doi/abs/10.1179/1362171...

Related URL: http://dx.doi.org/10.1179/136217102225001322

Abstract

A systematic procedure is outlined for scaling analysis of momentum and heat transfer in gas tungsten arc weld pools. With suitable selections of non-dimensionalised 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 scale at 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.

Item Type:Article
Source:Copyright of this article belongs to Institute of Materials, Minerals and Mining.
ID Code:101226
Deposited On:23 Dec 2016 10:02
Last Modified:23 Dec 2016 10:02

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