We calculate the ion distributions around an interface in fluid mixtures of highly polar and less polar fluids (water and oil) for two and three ion species. We take into account the solvation and image interactions between ions and solvent. We show that hydrophilic and hydrophobic ions tend to undergo a microphase separation at an interface, giving rise to an enlarged electric double layer. We...

Recently Khasare derived an equation of state for L-J fluid by modifying an expression for work done, obtained from partition function through perturbation approach .This is achieved by inserting at some fixed position in the m-component fluid, a single solute particle of radius ‘R’ in n-dimensions along with the necessary thermodynamic requirements. It was therefore thought worthwhile to under...

The formalism of conformal-solution theory (CST) has been extended to pure and mixed polar fluids with consideration of dipolar, quadrupolar and induced dipolar forces. The total potential energy is reduced to a form similar to that for neutral molecules by statistical averaging over orientations. The temperature dependence,s of the conformal parameters f, and h,, are derived and it is found th...

Duan, et al. (1992a, 1992b) developed an equation of state (EOS), similar to that of Lee and Kesler (1975), that describes P-V-T-X relations in the system H2O-CO2-CH4 over the range 50-1000 C / 0–1000 bar (0-1000 C / 08000 bar for single component fluids). An extensive comparison of values calculated with this EOS and experimental P-V-T-X and solvus data was published by Nieva and Barragán (200...

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...

The aggregation and structure of polar molecules in nonpolar media may have a profound effect on bulk phase properties and transport. In this study, we investigate the aggregation and deposition of water and asphaltenes, the most polar fraction in petroleum fluids. In flow-line experiments, we vary the concentration of water from 500 up to 175,000 ppm and provide the evidence for clear changes ...

Active fluids are intrinsically out-of-equilibrium systems due to the internal energy injection of active constituents. We show here that a transition from motion-less isotropic state towards flowing polar one can be possibly driven by sole through action polar-hydrodynamic interactions in absence an ad hoc free-energy which favors development ordered phase. In particular, we propose analytical...