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Proceedings Paper

Marangoni convection in the rear part of melting pool in keyhole laser welding
Author(s): Vitaliy A. Lopota; Gleb A. Turichin; E. A. Valdaitseva; Eckhard Beyer; S. Voellmar
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Paper Abstract

The article devoted to modeling of influence of thermo-capillary convection on heat transfer in melting pool during CW laser welding. An approximation of potential flow with boundary layers was used for solution of hydrodynamic problem in melting pool. A hydrodynamic problem was formulated in terms of current function. To determine a value of melt velocity circulation a condition of equality of mechanical powers of driving force (Marangoni tension) and braking force (viscous tension in boundary layer) was used. Calculations show that Marangoni convection increase an upper part and diminish a bottom part of melt pool.

Paper Details

Date Published: 2 April 2004
PDF: 8 pages
Proc. SPIE 5399, Laser-Assisted Micro- and Nanotechnologies 2003, (2 April 2004); doi: 10.1117/12.555550
Show Author Affiliations
Vitaliy A. Lopota, St. Petersburg State Polytechnical Univ. (Russia)
Gleb A. Turichin, St. Petersburg State Polytechnical Univ. (Russia)
E. A. Valdaitseva, St. Petersburg State Polytechnical Univ. (Russia)
Eckhard Beyer, Fraunhofer-Institut fuer Werkstoff- und Strahltechnik (Germany)
S. Voellmar, Fraunhofer-Institut fuer Werkstoff- und Strahltechnik (Germany)


Published in SPIE Proceedings Vol. 5399:
Laser-Assisted Micro- and Nanotechnologies 2003
Vadim P. Veiko, Editor(s)

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