A V Bulanov (Institute for Computer Aided Design of the Russian Academy of Sciences) :
Articles:
519.63 Numerical modelling of shock wave processes induced by femtosecond laser pulses
Bulanov A. V. (Institute for Computer Aided Design of the Russian Academy of Sciences), Shepelev V. V. (Institute for Computer Aided Design of the Russian Academy of Sciences), Fortova S. V. (Institute for Computer Aided Design of the Russian Academy of Sciences)
doi: 10.18698/2309-3684-2024-4-6677
In this paper, the problem of irradiating an aluminum target with a femtosecond laser pulse is investigated. The calculation of the problem is carried out using the finite element Lagrangian method. The results are compared with calculations by the Godunov type method and the molecular dynamics method. Hydrodynamic calculations show almost complete compliance. Using the method with movable mesh allows you to accurately determine the boundary of the material. In the field of rarefaction waves, hydrodynamic methods show a much larger amplitude of negative pressures than calculations done with molecular dynamics method. A separation model is proposed, which takes into account possible ruptures of the material. The use of the separation model in calculations improves compliance with molecular dynamics models and prevents the formation of a second shock wave.
Буланов А.В., Шепелев В.В. Фортова С.В. Численное моделирование распространения индуцированной лазером ударной волны в алюминии. Математическое моделирование и численные методы, 2024, № 4, с. 66–77.