Generalized relation between surface tension and viscosity: a study on pure and mixed n-alkanes
authors Queimada, AJ; Marrucho, IM; Stenby, EH; Coutinho, JAP
nationality International
journal FLUID PHASE EQUILIBRIA
author keywords interfacial tension; mixtures; model; n-alkanes; pure; viscosity
keywords MIXTURES; HEXADECANE; EICOSANE; HEPTANE; LIQUIDS
abstract A generalized relation is presented to correlate liquid-vapor surface tension with viscosity, both for pure compounds and mixtures. Plots of different data sets verify that the natural logarithm of the surface tension is linear with the reciprocal viscosity, with slope-dependent on the molecular weight and constant intercept for n-alkanes with chain length greater than n-C(10)H(22). For these, the value of the intercept can be related to the surface tension at the temperature of homogeneous nucleation, where the reciprocal viscosity tends to zero. The relations found for the slope and intercept of pure components are also shown to be valid for mixtures, so that only a viscosity (or surface tension) value is required to calculate a surface tension (or viscosity). Some distillation cuts from crude oils of different origins were also presented. Although the linear relation is still valid, the proposed correlations for the slope and intercept of n-alkanes cannot be used, confirming that mixing rules and family specific correlations are required for fluids containing components of different families. The results presented on this work show how bulk transport and equilibrium surface properties can be interrelated. (C) 2004 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0378-3812
year published 2004
volume 222
beginning page 161
ending page 168
digital object identifier (doi) 10.1016/j.fluid.2004.06.016
web of science category Thermodynamics; Chemistry, Physical; Engineering, Chemical
subject category Thermodynamics; Chemistry; Engineering
unique article identifier WOS:000223777100019
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journal impact factor 2.838
5 year journal impact factor 2.454
category normalized journal impact factor percentile 61.717
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