HIGH ENERGY PROCESS SIMULATION AND WIDE-RANGE EQUATIONS OF STATE FOR METALS

L.V. Altschuler, S.E. Brusnikin
VANT. Ser.: Mat. Mod. Fiz. Proc 1992. Вып.1. С. 34-42.

      Wide-range equations of state are obtained for eleven metals which have regular asymptotics and adequately describe experimental state thermodynamics, plasma, condensed phases and melting and vaporization processes. The equations were obtained by combining free energy of experimental data and that of regional theoretical models In the thermodynamic potential form using interpolations.
      For temperature less than T≤5 keV, dynamic experiments,ultrasonic and thermophysical measurements, spectroscopic data and critical point parameter estimations were used to derive semi-empirical equations of state. High energy ranges interpolationally combine plasma models and quantum-statistical descriptions. For the whole phase diagram, the free energy of an electronic subsystem in an approximate form represents self-similar solution of Thomas-Fermi theory and two correction functions. Wide-range equation-of-state versions for reduced ranges can be implemented In an analytic form for gasdynamic calculations without tabular representations.