liquid-liquid equilibria for the (water + lactic acid + benzyl alcohol or p-xylene) ternary systems were investigated at atmospheric pressure and in the temperature range from 298.15-318.15 k. the studied systems exhibit two types of liquid-liquid equilibrium (lle) behavior. the system consisting of benzyl alcohol displays type-1 lle behavior, while a type-2 behavior is exhibited by the other s...

In this study using Equation of State/ Helmholtz excess energy function,  EOS/AE, two new local composition-Equation-of State mixing rules, LCEOS1 and LCEOS2 were developed in which the energy interaction parameters were expressed in terms of attractive and repulsive parameters of the cubic equation of state. The EOS/AE models are applied for equilibrium calculation of nat...

Using measured radial velocity data of five double-lined spectroscopic binary systems EQ Tau, V376 And, V776 Cas, V2377 Oph and V380 Cygni, we find corresponding orbital and spectroscopic elements via the method introduced by Karami & Teimoorinia and Karami & Mohebi. Our numerical results are in good agreement with those obtained by others using more traditional methods.

The fluid-phase behavior of binary mixtures of cholesterol with phosphatidylcholines is investigated using magnetic resonance methods. Phospholipid biradicals provide the electron spin resonance spectroscopic resolution of two immiscible fluid phases in the dipalmitoylphosphatidylcholine-cholesterol system. Isotropic chemical shifts of the phospholipid carbonyl carbons in binary mixtures with c...

At low-enough fluid densities, we have found some naive singular behavior, like the van Hove singularities in the phonon spectra of lattices, appearing in the instantaneous normal mode spectra of the Lennard-Jones (LJ) 2n-n fluids, which serve as a prototype of topologically disordered systems. The singular behavior cannot be predicted by the mean-field theory, but interpreted by the perturbed ...

Volatile market demands, stronger regionalization of markets, ever-shortening product and innovation cycles as well an ongoing demand for individualized products increase the need adaptable production systems. More than a century after start mass production, alternative systems are required to go beyond current state art concerning adaptability, flexibility reconfigurability requirements demand...

We describe some scaling issues that arise when using lattice Boltzmann (LB) methods to simulate binary fluid mixtures--both in the presence and absence of colloidal particles. Two types of scaling problem arise: physical and computational. Physical scaling concerns how to relate simulation parameters to those of the real world. To do this effectively requires careful physics, because (in commo...

A tutorial introduction to the statistical mechanics of phase transitions and coexistence is presented, starting out from equilibrium systems nonequilibrium steady-state situations in externally driven systems, such as unmixing sheared binary fluid mixtures, lattice gas model, onset Rayleigh-Bénard convection. Then, some models for separation active where particles possess internal motility, ar...