Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

An analytic and complete equation of state for condensed phase materials

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/5.0165249· OSTI ID:2007372
Analytic equations of state (EOS) are intended to reproduce theoretical and experimental data in a single phase portion of the thermodynamic space. We devise a complete and thermodynamically consistent model with four distinct features: (1) a reference isotherm that remains thermodynamically stable, (2) a flexible specific heat model based on a fourth-order rational polynomial, (3) a Grüneisen parameter that depends on specific volume and temperature, and (4) pressure and internal energy functions that can be inverted analytically in temperature. The model aims to improve the accuracy of existing equations of state while remaining computationally efficient. To demonstrate its features, we include calibrations for single-crystal pentaerythritol tetranitrate (PETN), liquid nitromethane (NM), and hexagonal close-packed beryllium (Be) metal. The parameter optimization uses the specific heat capacity, Grüneisen parameter, and static compression curves obtained from density functional theory for the crystalline solids and molecular dynamics simulations for liquid NM. We also present a velocity autocorrelation function that yields accurate phonon densities of states for the EOS calibration from the molecular dynamics trajectories. Each of the three calibrations is constrained to enforce the ambient state from experimental measurements and validated against experimental Hugoniot data from multiple sources. We also include one-dimensional hydrodynamic simulations of the isentropic compression experiments for beryllium conducted at the Z facility.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2007372
Report Number(s):
LA-UR--23-26933
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 12 Vol. 134; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (58)

Machine Learning Interatomic Potentials as Emerging Tools for Materials Science journal September 2019
Effect of the damping function in dispersion corrected density functional theory journal March 2011
Complete Equations of State for Cyclotetramethylene Tetranitramine journal March 2021
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Complete equation of state for unreacted solid explosive journal February 2000
Quickstep: Fast and accurate density functional calculations using a mixed Gaussian and plane waves approach journal April 2005
Thermodynamics with the Grüneisen parameter: Fundamentals and applications to high pressure physics and geophysics journal January 2019
The most crucial factor on the thermal conductivity of metal-water nanofluids: Match degree of the phonon density of state journal November 2022
First principles phonon calculations in materials science journal November 2015
Triple-shock entropy theorem and its consequences journal July 1998
Free Energy Based Equation of State for Pentaerythritol Tetranitrate journal December 2016
Identifying the Molecular Properties that Drive Explosive Sensitivity in a Series of Nitrate Esters journal October 2022
Theoretical and spectroscopic study of asymmetric methyl rotor dynamics in gaseous partially deuterated nitromethanes journal April 1993
Coefficient of thermal expansion of, and sound speed through, nitromethane and four bis(difluoroamino)alkanes journal January 1970
Coefficient of thermal expansion of pentaerythritol tetranitrate and hexahydro-1,3,5-trinitro-s-triazine (RDX) journal July 1972
Global Optimization by Basin-Hopping and the Lowest Energy Structures of Lennard-Jones Clusters Containing up to 110 Atoms journal July 1997
SciPy 1.0: fundamental algorithms for scientific computing in Python journal February 2020
Complete equations of state for PETN and its products from atomistic simulations journal January 2020
Equation of state and temperature measurements for shocked nitromethane journal November 2000
Beryllium’s monocrystal and polycrystal elastic constants journal March 2004
Fundamental equation of state of liquid nitromethane to 100 kbar journal December 1973
A Fundamental Derivative in Gasdynamics journal January 1971
Equation of State Measurements for Beryllium in the ICF Capsule Regime
  • Swift, Damian
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2003: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.1780198
conference January 2004
A void growth‐based failure model to describe spallation journal February 1989
Rate‐dependent ductile failure model journal August 1993
The isothermal linear and volume compression of pentaerythritol tetranitrate (PETN) to 10 GPa (100 kbar) and the calculated shock compression journal June 1975
Response of liquid carbon disulfide to shock compression: Equation of state at normal and high densities journal August 1983
Energy conserving, linear scaling Born-Oppenheimer molecular dynamics journal October 2012
Thermostating extended Lagrangian Born-Oppenheimer molecular dynamics journal April 2015
Transferable density functional tight binding for carbon, hydrogen, nitrogen, and oxygen: Application to shock compression journal January 2019
Multiphase equation of state and thermoelastic data for polycrystalline beryllium
  • Coe, Joshua D.; Rudin, Sven P.; Maiorov, Boris
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2019: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/12.0000902
conference January 2020
Shock to detonation transition of pentaerythritol tetranitrate (PETN) initially pressed to 1.65 g/cm 3 journal July 2021
Pressure, temperature, and orientation dependent thermal conductivity of pentaerythritol tetranitrate (PETN) journal December 2021
A robust three-parameter reference curve for condensed phase materials journal January 2022
Accurate determination of the lattice parameters of beryllium journal November 1959
Universal features of the equation of state of solids journal March 1989
Phase changes and the equation of state of Zr journal August 2005
Inhomogeneous Electron Gas journal November 1964
Self-Consistent Equations Including Exchange and Correlation Effects journal November 1965
Computer Simulation of the Lattice Dynamics of Solids journal December 1969
Finite Elastic Strain of Cubic Crystals journal June 1947
Sound velocity, shear modulus, and shock melting of beryllium along the Hugoniot journal August 2019
Anharmonic lattice dynamics in large thermodynamic ensembles with machine-learning force fields: CsPbBr3 , a phonon liquid with Cs rattlers journal January 2022
Special points for Brillouin-zone integrations journal June 1976
High-precision sampling for Brillouin-zone integration in metals journal August 1989
Ab initiomolecular dynamics for liquid metals journal January 1993
Ab initio molecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium journal May 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Separable dual-space Gaussian pseudopotentials journal July 1996
Self-consistent-charge density-functional tight-binding method for simulations of complex materials properties journal September 1998
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
High-pressure–temperature phase diagram and the equation of state of beryllium journal November 2012
Extended Born-Oppenheimer Molecular Dynamics journal March 2008
Sounds of Failure: Passive Acoustic Measurements of Excited Vibrational Modes journal May 2018
Generalized Gradient Approximation Made Simple journal October 1996
The Riemann problem for fluid flow of real materials journal January 1989
Projector augmented-wave method journal December 1994
Equations of State for the Deep Earth: Some Fundamental Considerations journal October 2019

Similar Records

Verification of conventional equations of state for tantalum under quasi-isentropic compression
Journal Article · Thu Nov 20 23:00:00 EST 2014 · Journal of Applied Physics · OSTI ID:22402655

Formulation of the Rice-Walsh equation of state based on Shock Hugoniot data for porous metals
Journal Article · Sat May 21 00:00:00 EDT 2016 · Journal of Applied Physics · OSTI ID:22597000

Multiphase equation of state and thermoelastic data for polycrystalline beryllium
Journal Article · Tue Dec 31 23:00:00 EST 2019 · AIP Conference Proceedings · OSTI ID:1739930