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Marangoni convection in weld pools with a free surface
Author(s) -
Tsai M. C.,
Kou Sindo
Publication year - 1989
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650091206
Subject(s) - marangoni effect , marangoni number , convection , mechanics , surface tension , free surface , weld pool , materials science , flow (mathematics) , surface (topology) , fluid dynamics , welding , thermodynamics , geometry , physics , mathematics , metallurgy , gas tungsten arc welding , arc welding
A steady‐state two‐dimensional model of heat transfer and fluid flow was developed to describe Marangoni convection in the weld pool. Both the pool surface and the fusion boundary were calculated. The validity of the model was verified against an asymptotic solution for Marangoni‐convection‐induced free surface geometry. Two different cases were studied, i.e. a negative surface tension temperature coefficient ∂γ/∂ T a positive one, and the resultant shapes of the weld pool surface were compared.