کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8161646 1525120 2018 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enthalpy-based equation of state for highly porous materials employing modified soft sphere fluid model
ترجمه فارسی عنوان
معادله حالت مبتنی بر انتالپی برای مواد بسیار متخلخل با استفاده از مدل اصلاح شده نرم کروم نرم
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی
Enthalpy-based equation of state based on a modified soft sphere model for the fluid phase, which includes vaporization and ionization effects, is formulated for highly porous materials. Earlier developments and applications of enthalpy-based approach had not accounted for the fact that shocked states of materials with high porosity (e.g., porosity more than two for Cu) are in the expanded fluid region. We supplement the well known soft sphere model with a generalized Lennard-Jones formula for the zero temperature isotherm, with parameters determined from cohesive energy, specific volume and bulk modulus of the solid at normal condition. Specific heats at constant pressure, ionic and electronic enthalpy parameters and thermal excitation effects are calculated using the modified approach and used in the enthalpy-based equation of state. We also incorporate energy loss from the shock due to expansion of shocked material in calculating porous Hugoniot. Results obtained for Cu, even up to initial porosities ten, show good agreement with experimental data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 529, 15 January 2018, Pages 66-72
نویسندگان
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