asphaltenes are the n-pentane or n-heptane insoluble fractions of crude oil that remain in solution under reservoir temperature and pressure conditions. they are destabilized and start to precipitate when the pressure, temperature and/or composition changes occur during primary production. the precipitated asphaltene particles will then grow in size and may start to deposit onto the production ...

a statistical mechanical based equation of state has been employed to calculate the liquid density of lead, mercury, bismuth and lead-bismuth and lead-lithium eutectic alloys.the equation is basically that of song, mason and ihm [ihm g, song y, mason ea. j. chem. phys.1991; 94: 3839] which is modified by ghatee and boushehri. three temperature dependent parameters are required to use this equat...

An optical system has been redesigned and used to measure detonation velocity as a function of condensed explosive density for RDX, HMX, PETN. These measurements are then used to determine and fine tune parameters appearing in the BKW (Beker-Kistiakowsky-Wilson) equation of state for gases at extremely high pressures. Steady state form of conservation equations along with the BKW state equation...

We consider the adiabatic equation of state for partially ionized non{ideal plasma. Plasma isentropes are calculated with the Pad e technique in the chemical picture. The interplay of ionization/dissociation equilibrium and non{ideality is investigated.

The equation of state (EOS) of warm dense hydrogen is treated theoretically by a free energy approach. At low densities hydrogen is a molecular fluid which can be described by fluid variational theory. Dissociation of molecules is treated self-consistently and thermodynamic properties of the neutral fluid can be given via standard relations, see [1] for details. At high densities hydrogen is pr...

At higher densities between 0.3 and 0.6 g/cm hydrogen undergoes a transition from a neutral uid to a plasma. Shock wave experiments probe this region along Hugoniot curves. New Z-pinch data [1] are in contradiction to laser induced shock-wave data [2] above 50 GPa. Theoretical descriptions of hydrogen show coincidence with either set of data. Fluid Variational Theory (FVT) describes the neutral...

Using path integral Monte Carlo (PIMC) and density functional molecular dynamics (DFT-MD) simulation methods, we compute a coherent equation of state (EOS) of nitrogen that spans the liquid, warm dense matter (WDM), and plasma regimes. Simulations cover a wide range of densitytemperature space, 1.5 − 13.9 g cm and 10 − 10 K. In the molecular dissociation regime, we extend the pressure-temperatu...