A THEORETICAL-MODEL OF THERMOCAPILLARY FLOWS IN LASER-WELDING


POSTACIOGLU N., KAPADIA P., DOWDEN J.

JOURNAL OF PHYSICS D-APPLIED PHYSICS, vol.24, no.1, pp.15-20, 1991 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 1
  • Publication Date: 1991
  • Doi Number: 10.1088/0022-3727/24/1/004
  • Title of Journal : JOURNAL OF PHYSICS D-APPLIED PHYSICS
  • Page Numbers: pp.15-20

Abstract

Surface tension variations on the surface of the weld pool, produced by a laser during the process of welding, can produce very strong currents. A linearized description of the process is constructed, as well a a non-linear boundary layer model that takes account of thermal conduction and fluid convection. It is found that there is a considerable difference between the predictions of the two approaches. The non-linear model produces results that are compatible with what is believed to occur in practice.