Validation for equation of state of Tantalum in wide regime

ORAL

Abstract

We introduce the wide regime equation of state (WEOS) developed in Institute of Applied Physics and Computational Mathematics (IAPCM). A semi-empirical model of the WEOS is given by a thermodynamically complete potential of the Helmholtz free energy which combines several theoretical models and has some adjustable parameters calibrated via some experimental and theoretical data. The validation methods of the equation of state in wide regime are presented in Tantalum. The results of the WEOS are well consistent with the available theoretical and experimental data, including isotherm, Hugoniot, off-Hugoniot and sound velocity data. It enhances our confidence in the accuracy of the WEOS, which is very important for the validation and verification of equation of state in high temperature and pressure technology.

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Authors

  • Haifeng Liu

    • Institute of Applied Physics and Computational Mathematics, Beijing

  • Gongmu Zhang

    • Institute of Applied Physics and Computational Mathematics, Beijing

  • Haifeng Song

    • Institute of Applied Physics and Computational Mathematics, Beijing

  • Hongzhou Song

    • Institute of Applied Physics and Computational Mathematics, Beijing

  • Yanhong Zhao

    • Institute of Applied Physics and Computational Mathematics, Beijing

  • Mingfeng Tian

    • Institute of Applied Physics and Computational Mathematics, Beijing

  • Shuaichuang Wang

    • Institute of Applied Physics and Computational Mathematics, Beijing