Three-dimensional axisymmetric model for convection in laser-melted pools

C. L. Chan, J. Mazumder, M. M. Chen

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

A three-dimensional axisymmetric model of the fluid flow and heat transfer in a laser-melted pool is developed. The model corresponds to the limiting case when the scanning velocity is small compared with the recirculating velocity. This model is also valid for spot welding. Non-dimensional forms of the governing equations are derived, from which four dimensionless parameters are obtained: the Marangoni number, the Prandtl number, the dimensionless melting temperature, and the radiation factor. Their effects and significance are discussed, and numerical solutions are obtained. The position and shape of the solid/liquid interface are obtained by an iterative scheme. The quantitative effects of the dimensionless parameters on pool shape are presented. In the presence of the flow field, the heat transfer becomes convection dominated. The effect of convection on isotherms within the molten pool is discussed, and experimental results are presented.

Original languageEnglish (US)
Pages (from-to)306-311
Number of pages6
JournalMaterials Science and Technology (United Kingdom)
Volume3
Issue number4
DOIs
StatePublished - Apr 1987
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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