an analytical equation of state was applied to calculate the thermodynamic properties for argon.the equation of state is that of song and mason. it is based on a statistical-mechanical perturbationtheory of the hard convex bodies and can be written as fifth-order polynomial in the density. thereexist three temperature-dependent parameters: the second virial coefficient, an effective molecularvo...

in the present work, we have obtained the equation of state for neutron star matter considering the in uence of the ferromagnetic and antiferromagnetic spin state. we have also investigated the structure of neutron stars. according to our results, the spin asymmetry stiens the equation of state and leads to high mass for the neutron star.

The peng-Robinson (PR), a cubic equation of state (EoS), is extended to polymers by using a single set of energy (A1, A2, A3) and co-volume (b) parameters per polymer fitted to experimental volume data. Excellent results for the volumetric behavior of the 11 polymer up to 2000 bar pressure are obtained. The EoS is applied to the correlation and prediction of Henry constants in polymer solutions...

0 d In this work, the group contribution approach has been used in combination with the linear isotherm regularity (LIR) equation of state to stimate pvT properties of primary, secondary and tertiary alcohols, ketones and 1-carboxylic acid. In addition, the isothermal compressibility nd thermal expansion coefficient of these compounds have been predicted. We assume each of these organic compoun...

In the framework of the non-relativistic Brueckner-Bethe-Goldstone theory, we derive a microscopic equation of state for asymmetric and β-stable matter containing Σ− and Λ hyperons. We mainly study the effects of three-body forces (TBF’s) among nucleons on the hyperon formation and the equation of state (EoS). We find that, when TBF’s are included, the stellar core is almost equally populated b...

We have used the Zimanyi & Moszkowski model in the relativistic mean-field theory to study the properties of asymmetric nuclear matter and the equation of state (EOS) for supernova matter. We find that even though muons are included in the chemical composition of neutron-star matter, this model still results in a small proton concentration so that only themodified Urca process occurs as a main ...

LLE Review, Volume 90 57 Introduction The equation of state (EOS) of materials at high densities and pressures is of wide interest to inertial confinement fusion (ICF), planetary physics, and astrophysics. The EOS at these conditions often involves a mixture of atomic, ionic, and molecular species, making ab initio theoretical modeling prohibitive. Experiments to constrain EOS models have been ...

This work investigates the modelization and simulation of liquid-vapor phase change in compressible flows. Each phase is modeled as a compressible fluid equipped with its own Equation of State (EOS). We suppose that inter-phase equilibrium processes in the medium operate at a short timescale compared to the other physical phenomena such as convection or thermal diffusion. This assumption provid...

We report quantum Monte Carlo QMC , plane-wave density-functional theory DFT , and interatomic pair-potential calculations of the zero-temperature equation of state EOS of solid neon. We find that the DFT EOS depends strongly on the choice of exchange-correlation functional, whereas the QMC EOS is extremely close to both the experimental EOS and the EOS obtained using the best semiempirical pai...

We derive the equation of state (EOS) for electrically charge neutral dense matter using Quantum Hadrodynamics (QHD) model. This is carried out in a nonperturbative manner including quantum corrections for baryons through a realignment of vacuum with baryon-antibaryon condensates. This yields the results of relativistic Hartree approximation of summing over baryonic tadpole diagrams. The quantu...