MODELLING OF LASER DRILLING PROCESS  SING A MOVING FRONT HEAT SOURCE

Eddie Leonardi; P. He; P. Mathew

CHT'01 - Advances in Computational Heat Transfer II. Proceedings of a Second Symposium

2001, 20-25 May, Palm Cove, Queensland, Australia

MODELLING OF LASER DRILLING PROCESS SING A MOVING FRONT HEAT SOURCE

pages 705-712

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Eddie Leonardi
Computational Fluid Dynamics Research Laboratory, School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052

P. He
School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney 2052, AUSTRALIA

P. Mathew
School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney 2052, AUSTRALIA

ABSTRACT

This paper presents a modelling approach to laser drilling using a moving heat source with the use of a fixed grid and sub region methodology of numerical computation. The methodology uses the concept of liquid fraction to obtain the temperature distribution and the shape of the drilled hole. In addition the piercing time for the generation of a through hole for different material thicknesses and power levels used are obtained from the numerical computation. The results obtained indicate that there is a limit to the power level required to obtain a through hole. The results obtained will have to be verified experimentally.

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Annual Review of Heat Transfer ISSN Print: 1049-0787
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