FINITE ELEMENT STUDY ON THE ROLE OF CONVECTION IN LASER SURFACE MELTING
作者:
K. Ravindran,
J. Srinivasan,
A. G. Marathe,
期刊:
Numerical Heat Transfer, Part A: Applications
(Taylor Available online 1994)
卷期:
Volume 26,
issue 5
页码: 601-618
ISSN:1040-7782
年代: 1994
DOI:10.1080/10407789408956012
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
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 σTvalues 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.
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