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International Heat Transfer Conference 13
Graham de Vahl Davis (open in a new tab) School of Mechanical and Manufacturing Engineering, University of New South Wales, Kensington, NSW, Australia
Eddie Leonardi (open in a new tab) Computational Fluid Dynamics Research Laboratory, School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052

ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

MOLECULAR DYNAMICS STUDY OF ULTRASHORT PULSED LASER MATERIAL PROCESSING

page 12
DOI: 10.1615/IHTC13.p11.90
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ABSTRAKT

A molecular dynamics study is conducted to understand the underlying physics on ultrashort pulsed laser ablation. Using the Lennard-Jones potential model, simulations have been performed for the pulse durations of 100 fs, 5 ps, and 100 ps FWHM. For the three different pulse durations, the whole process can be divided into two or three stages depending on their transport characteristics. The factors that affect the speed of melting and expansion are investigated considering the melting mechanism at various conditions. The mechanical expansion plays an important role in the ablation dominated by homogeneous nucleation.

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