Mean-field theoretical analysis of the corresponding-states behavior of model fluids with variable interaction range

Coexistence properties of the hard-core attractive Yukawa potential with inverse-range parameter kappa=9, 10, 12, and 15 are calculated by applying canonical Monte Carlo simulation. As previously shown for longer ranges, we show that also for the ranges considered here the coexistence curves scaled by the critical density and temperature obey the law of corresponding states, and that a linear relationship between the critical density and the reciprocal of the critical temperature holds. The simulation results are compared to the predictions of the self-consistent Ornstein-Zernike approximation, and a good agreement is found for both the critical points and the coexistence curves, although some slight discrepancies are present.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of short-range attractive Yukawa fluid: Simulation and theory

Orea

Tapia-Medina

Pini

et al. 2010

“…[4][5][6][7][8][9][10][11] Recently, renewed attention has been paid to hard-core attractive Yukawa fluids with short attraction range. [12][13][14][15][16][17][18][19] This interest stems mainly because they capture the most important features of real systems, such as interfacial and coexistence properties which rule many industrial processes and biological phenomena.…”

Section: Introductionmentioning

confidence: 99%

Interfacial and coexistence properties of soft spheres with a short-range attractive Yukawa fluid: Molecular dynamics simulations

González‐Melchor

Hernández-Cocoletzi

López-Lemus

et al. 2012

Molecular dynamics simulations have been carried out to obtain the interfacial and coexistence properties of soft-sphere attractive Yukawa (SAY) fluids with short attraction range, κ = 10, 9, 8, 7, 6, and 5. All our simulation results are new. These data are also compared with the recently reported results in the literature of hard-core attractive Yukawa (HAY) fluids. We show that the interfacial and coexistence properties of both potentials are different. For the surveyed systems, here we show that all coexistence curves collapse into a master curve when we rescale with their respective critical points and the surface tension curves form a single master curve when we plot γ* vs. T/T(c).

“…On the other hand, short-range attractive potentials are specially relevant for modeling protein solutions, i. e., systems having a key role in biological applications 17,18 . Hence, there is an increasing attention on this type of interactions [19][20][21][22][23][24] . For these type of interactions, the vapor-liquid coexistence curve turns metastable since it locates within the vapor-solid coexistence curve 11,[25][26][27][28] .…”

Section: Introductionmentioning

confidence: 99%

Vapor–liquid surface tension of strong short-range Yukawa fluid

Odriozola

Barcenas

Orea

2011

The thermodynamic properties of strong short-range attractive Yukawa fluids, κ = 10, 9, 8 and 7, are determined by combining the slab technique with the standard and the replica exchange Monte Carlo (REMC) methods. A good agreement was found among the coexistence curves of these systems calculated by REMC and those previously reported in the literature. However, REMC allows exploring the coexistence at lower temperatures, where dynamics turns glassy. To obtain the surface tension we employed, for both methods, a procedure that yields the pressure tensor components for discontinuous potentials. The surface tension results obtained by the standard MC and REMC techniques are in good agreement.