TWO-DIMENSIONAL TRANSIENT MODEL FOR CONVECTION IN LASER MELTED POOL.

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

Research output: Contribution to journalConference articlepeer-review

253 Scopus citations

Abstract

A two-dimensional transient model for convective heat transfer and surface tension driven fluid flow is developed. The model describes the transient behavior of the heat transfer process of a stationary band source. Semi-quantitative understanding of scanning is obtained by a coordinate transformation. The non-dimensional forms of the equations are derived and four dimensionless parameters are identified, namely, Peclet number (Pe), Prandtl number (Pr), surface tension number (S), and dimensionless melting temperature (T//m*). Their governing characteristics and their effects on pool shape, cooling rate, velocity field, and solute redistribution are discussed. A numerical solution is obtained and presented. Quantitative effects of Prandtl number and surface tension number on surface velocity, surface temperature, pool shape, and cooling rate are presented graphically.

Original languageEnglish (US)
Pages (from-to)2175-2184
Number of pages10
JournalMetallurgical transactions. A, Physical metallurgy and materials science
Volume15 A
Issue number12
StatePublished - Dec 1 1983
Externally publishedYes
EventSymp on Fluid Flow at Solid-Liq Interfaces - Philadelphia, PA, USA
Duration: Oct 5 1983Oct 5 1983

ASJC Scopus subject areas

  • Engineering(all)

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