FINITE ELEMENT STUDY ON THE ROLE OF CONVECTION IN LASER SURFACE MELTING
- 1 November 1994
- journal article
- research article
- Published by Taylor & Francis in Numerical Heat Transfer, Part A: Applications
- Vol. 26 (5) , 601-618
- https://doi.org/10.1080/10407789408956012
Abstract
The surface-tension-driven convection in laser melting has been simulated by the Galerkin finite element method. The governing laminar, axisymmelric convection equations are solved in a sequential manner by an explicit projection method. The numerical results show a strong dependence of the flow pattern on the value of the temperature coefficient of surface tension (σT). Results are presented for a range of σT values typical in steel, -l0−4≤σT + l0−4N/mK. As the melt depth is more affected than the width, the melt aspect ratio changes due to convection. The melt pool is broad and shallow when σT < 0, and deep and narrow when σT > 0.Keywords
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