On the Influence of Pressure and Porosity on the Parameters of the Equation of State of a Porous Substance

IF 1 4区 物理与天体物理 Q4 PHYSICS, APPLIED
R. K. Bel’kheeva
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引用次数: 0

Abstract

The influence of porosity and pressure on the parameters of the equation of state of a porous material is studied. The model takes into account the presence of gas in the pores. The equations of state of the mixture and its components, both solid and gaseous, are presented uniformly (in the form of the Mie–Grüneisen equation with the Grüneisen coefficient depending on density). To describe the Grüneisen coefficient, a logarithmic dependence on density is used. Numerical calculations of shock-wave loading and isentropic unloading of copper samples of various porosities are carried out. It is shown that the parameters of the equation of state obtained under normal conditions adequately describe the behavior of the substance both under loading and unloading.

Abstract Image

压力和孔隙度对多孔物质状态方程参数的影响
摘要 研究了孔隙率和压力对多孔材料状态方程参数的影响。该模型考虑了孔隙中气体的存在。混合物及其固态和气态成分的状态方程是统一呈现的(以米氏-格吕奈森方程的形式,格吕奈森系数取决于密度)。为了描述格吕尼森系数,使用了密度的对数依赖关系。对不同孔隙率的铜样品进行了冲击波加载和等熵卸载的数值计算。结果表明,在正常条件下获得的状态方程参数能够充分描述物质在加载和卸载时的行为。
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来源期刊
High Temperature
High Temperature 物理-物理:应用
CiteScore
1.50
自引率
40.00%
发文量
0
审稿时长
4-8 weeks
期刊介绍: High Temperature is an international peer reviewed journal that publishes original papers and reviews written by theoretical and experimental researchers. The journal deals with properties and processes in low-temperature plasma; thermophysical properties of substances including pure materials, mixtures and alloys; the properties in the vicinity of the critical point, equations of state; phase equilibrium; heat and mass transfer phenomena, in particular, by forced and free convections; processes of boiling and condensation, radiation, and complex heat transfer; experimental methods and apparatuses; high-temperature facilities for power engineering applications, etc. The journal reflects the current trends in thermophysical research. It presents the results of present-day experimental and theoretical studies in the processes of complex heat transfer, thermal, gas dynamic processes, and processes of heat and mass transfer, as well as the latest advances in the theoretical description of the properties of high-temperature media.
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