Equations of state, energy transport and two-temperature hydrodynamic simulations for femtosecond laser irradiated copper and gold

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Migdal, K.P.^1 ; Il'Nitsky, D.K.^1 ; Petrov, Yu.V.^2 ; Inogamov, N.A.^2

All-Russia Scientific Research Institute of Automatics, Sushchevskaya 22, Moscow

127055, Russia^1

Landau Institute for Theoretical Physics, Russian Academy of Scienses, Akademika Semenova 1a, Chernogolovka, Moscow Region

142432, Russia^2

关键词: Electron screening;    Electron-electron collisions;    Exchange correlations;    Hydrodynamic simulation;    Hydrodynamics simulations;    Nonequilibrium state;    Temperature and pressures;    Thermodynamic and transport properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012086/pdf
DOI  :  10.1088/1742-6596/653/1/012086

来源: IOP

【 摘 要 】

In this work, the model of thermodynamic and transport properties of copper and gold at electron-ion non-equilibrium state is presented. Accepted here ranges of electron temperature and pressure are enough to describe the experimentally achievable states. The changes in electron spectra due to electron heating and compression or expansion are taken into account using two-parabolic model. In our previous works, thermal conductivity and electron-ion coupling were considered as dependencies on electron and ion temperatures. Now the dependence on density for these coefficients is taken into account. To include exchange-correlation effects on electron-electron collisions we have found out how this effect can be included in electron screening. In addition, we have renewed our approach for heat conductivity calculation to include thermoelectric phenomena, which are significant at high electron temperatures. The effect of electron heating on sound velocities in aforementioned metals is investigated. The two-temperature hydrodynamics simulation of film expansion was provided with the use of the model presented here.