Simulation of the main physical processes in remote laser penetration with large laser spot size

Journal Article · Wed Apr 01 00:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4918284· OSTI ID:1177823

Khairallah, S. A.; Anderson, A.; Rubenchik, A. M.; Florando, J.; Wu, S.; Lowdermilk, H.

A 3D model is developed to simulate remote laser penetration of a 1mm Aluminum metal sheet with large laser spot size (~3x3cm²), using the ALE3D multi-physics code. The model deals with the laser-induced melting of the plate and the mechanical interaction between the solid and the melted part through plate elastic-plastic response. The effect of plate oscillations and other forces on plate rupture, the droplet formation mechanism and the influence of gravity and high laser power in further breaking the single melt droplet into many more fragments are analyzed. In the limit of low laser power, the numerical results match the available experiments. The numerical approach couples mechanical and thermal diffusion to hydrodynamics melt flow and accounts for temperature dependent material properties, surface tension, gravity and vapor recoil pressure.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1177823
• Alternate ID(s): OSTI ID: 1200904; OSTI ID: 1420677
• Journal Information: AIP Advances, Journal Name: AIP Advances Vol. 5 Journal Issue: 4; ISSN 2158-3226
• Publisher: American Institute of Physics
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
surface tension
fluid drops
aluminum
laser materials
liquid surfaces