Numerical Studies of Gas Jet/Molten Layer Interaction During Laser Cutting

[+] Author and Article Information
C. K. Lim, P. A. Molian, R. C. Brown, J. M. Prusa

Department of Mechanical Engineering, Iowa State University, Ames, IA 50011

J. Manuf. Sci. Eng 120(3), 496-503 (Aug 01, 1998) (8 pages) doi:10.1115/1.2830152 History: Received November 01, 1995; Revised November 01, 1996; Online January 17, 2008


The interaction of the gas jet with the molten layer during reactive-gas assisted laser cutting is investigated. The Navier-Stokes equations in each region are solved with an implicit finite-difference algorithm. The erosion front is modeled as a free surface and its profile is determined from the interaction. Equilibrium oxidation reactions are assumed and the laser is operating in TEM00 mode. Results for laser cutting of 3.175 mm and 6.35 mm thick mild steel with an oxygen jet are presented to illustrate the details of the gas jet/molten layer interaction.

Copyright © 1998 by The American Society of Mechanical Engineers
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