Surface tension of a square well fluid

2003 ◽  
Vol 118 (12) ◽  
pp. 5635-5639 ◽  
Author(s):  
Pedro Orea ◽  
Yurko Duda ◽  
José Alejandre
Keyword(s):  
Surface Tension ◽  
Square Well

Surface tension and orthobaric densities for vibrating square well dumbbells. I

2010 ◽  
Vol 132 (10) ◽  
pp. 104704 ◽  
Author(s):  
Gustavo A. Chapela ◽  
José Alejandre
Keyword(s):  
Surface Tension ◽  
Square Well

On the surface tension and shear viscosity of square-well fluids

1981 ◽  
Vol 59 (5) ◽  
pp. 673-677
Author(s):  
S. K. Datta
Keyword(s):  
Surface Tension ◽  
Shear Viscosity ◽  
Spherical Model ◽  
Viscosity Coefficient ◽  
Model Approximation ◽  
Mean Spherical Model ◽  
Square Well ◽  
Experimental Values ◽  
Real Fluids ◽  
Nonpolar Molecules

Closed analytical expressions for the surface tension and the shear viscosity coefficient of a square-well fluid have been obtained using the mean spherical model approximation (MSMA) and the exact hard sphere equation of state given by Carnahan and Stirling. The expressions are then used to calculate these properties for some real fluids. The fair agreement between the calculated and experimental values in the case of several symmetric nonpolar molecules, suggests that the representation of the attractive tail by a square-well potential is a satisfactory one even in the calculation of these complex properties and that the use of MSMA in the elucidation of the equilibrium and transport properties of liquids provides a more or less satisfactory and convenient approach.

Surface tension and vapor–liquid phase coexistence of the square-well fluid

2003 ◽  
Vol 119 (6) ◽  
pp. 3405-3412 ◽  
Author(s):  
Jayant K. Singh ◽  
David A. Kofke ◽  
Jeffrey R. Errington
Keyword(s):  
Surface Tension ◽  
Liquid Phase ◽  
Phase Coexistence ◽  
Square Well ◽  
Vapor Liquid

scholarly journals Vapour–liquid interfacial properties of square-well chains from density functional theory and Monte Carlo simulation

2017 ◽  
Vol 19 (19) ◽  
pp. 12296-12309 ◽  
Author(s):  
Francisco José Martínez-Ruiz ◽  
Felipe J. Blas ◽  
A. Ignacio Moreno-Ventas Bravo ◽  
José Manuel Míguez ◽  
Luis G. MacDowell
Keyword(s):  
Density Functional Theory ◽  
Surface Tension ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Density Functional ◽  
Liquid Surface ◽  
Interfacial Properties ◽  
Functional Theory ◽  
Liquid Surface Tension ◽  
Square Well

Vapour–liquid surface tension for tangent (open symbols) and vibrating (filled symbols) square-well chains.

INVESTIGATING BRIDGE-LIKE STRUCTURES IN A SQUARE-WELL BINARY MIXTURE USING NVT MONTE CARLO SIMULATION

2011 ◽  
Vol 10 (01n02) ◽  
pp. 329-333 ◽  
Author(s):  
SATYA PAL SINGH ◽  
JAYANT K. SINGH ◽  
ASHUTOSH SHARMA
Keyword(s):  
Surface Tension ◽  
Binary Mixture ◽  
Initial Density ◽  
Delta Function ◽  
Step Function ◽  
Critical Parameters ◽  
Complete Wetting ◽  
Density Profiles ◽  
Square Well ◽  
2D And 3D

Bridge-like structures have been reported in recent studies for a binary mixture with square well fluids in 2D and 3D using different techniques. In this paper, we present our NVT simulation results in 3D with symmetric additive water and oil-like molecules. We use Dirac's delta function defined using theta step function for evaluating pressure components and surface tension values. Our investigation reveals that though 3D NVT MC results are in qualitative agreement with the published results showing all the structures as bridge-like, complete wetting of the walls by the preferred component and micelle structures but the critical parameters as surface attraction strength significantly alter to lower values for PW and CW cases in comparison to the 2D MD cases. We have studied cases with pore width as H = 6.0, 8.0, and 10.0 at T = 0.70, 0.80, and 0.90 for εAB = 0.0, 0.25, 0.50, and 1.0. For all of the bridge cases ε Wall -A = -0.50 and λ wall -A = 1.0. For fluid–fluid interaction λ ff = 1.2 and 1.5 are taken with εAA = εBB = -1.0. Our pressure and surface tension values show clear signature of confinement effect and dependence on other parameters for the bridge cases but it is concluded that different structural transitions depend only on the predefined energetically favorable and unfavorable interfaces which in turn comes from the separation of the two walls and average initial density. Our density profiles confirm the evolved structures.

A modified square well model in obtaining the surface tension of pure and binary mixtures of hydrocarbons

2008 ◽  
Vol 40 (7) ◽  
pp. 1131-1135 ◽  
Author(s):  
Ali Bitaab ◽  
Vahid Taghikhani ◽  
Cyrus Ghotbi ◽  
Shahab Ayatollahi
Keyword(s):  
Surface Tension ◽  
Binary Mixtures ◽  
Well Model ◽  
Square Well

Immunoferritin localization of intracellular antigens in positively stained frozen sections

1978 ◽  
Vol 36 (2) ◽  
pp. 168-169
Author(s):  
K. T. Tokuyasu
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Thin Layers ◽  
The Other ◽  
Positive Staining ◽  
Frozen Sections ◽  
The Past ◽  
Ultrathin Frozen Sections ◽  
Definition Of

During the past investigations of immunoferritin localization of intracellular antigens in ultrathin frozen sections, we found that the degree of negative staining required to delineate u1trastructural details was often too dense for the recognition of ferritin particles. The quality of positive staining of ultrathin frozen sections, on the other hand, has generally been far inferior to that attainable in conventional plastic embedded sections, particularly in the definition of membranes. As we discussed before, a main cause of this difficulty seemed to be the vulnerability of frozen sections to the damaging effects of air-water surface tension at the time of drying of the sections.Indeed, we found that the quality of positive staining is greatly improved when positively stained frozen sections are protected against the effects of surface tension by embedding them in thin layers of mechanically stable materials at the time of drying (unpublished).

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