高压物理学报2025，Vol.39Issue(11)：129-136,8.DOI:10.11858/gywlxb.20251120
混合物Hugoniot状态方程计算模型研究
Hugoniot Equation of State Model for Mixtures
摘要
Abstract
High-throughput computing has become a cornerstone of modern materials design and is driving new advances in the study of shock-compressed matter.Central to these efforts is an accurate Hugoniot equation of state(EOS)for mixtures,yet existing mixture models continue to show sizeable scatter.Here we benchmarked two widely used schemes—the volume-additive model(Mod A)and the isothermal-average model(ModⅠ)—against experimental Hugoniot data for binary alloys,ternary alloys and granular mixtures.The Mod A model assumes full thermodynamic equilibrium and neglects the temperature rise of individual constituents under shock compression.The ModⅠmodel,by contrast,removes this thermal contribution by deriving the mixture Hugoniot from 0 K isotherms via the Mie-Grüneisen EOS.Systematic comparison between the predicted Hugoniot EOS of binary alloy,ternary alloy,granular mixtures and the experimental data reveals that the ModⅠmodel reproduces measured Hugoniot states within about 10%error across the entire pressure range studied,outperforming the Mod A model in both accuracy and robustness.Both approaches exhibit moderately larger discrepancies at low shock pressures,where thermal effects are most pronounced.关键词
混合物/Hugoniot/状态方程/体积可加原则/等温平均Key words
mixture/Hugoniot/equation of state/principle of volume additivity/isothermal average引用本文复制引用
杨刚,赵正洋,刘勋,胡家念,贾永胜..混合物Hugoniot状态方程计算模型研究[J].高压物理学报,2025,39(11):129-136,8.基金项目
江汉大学基金(PBSKL2023QD02,2023JCYJ04) （PBSKL2023QD02,2023JCYJ04）
