Viscosity of liquid mixtures: the Vesovic-Wakeham method for chain molecules

The Journal of Chemical Physics
Astrid S de WijnVelisa Vesovic

Abstract

New expressions for the viscosity of liquid mixtures, consisting of chain-like molecules, are derived by means of Enskog-type analysis. The molecules of the fluid are modelled as chains of equally sized, tangentially joined, and rigid spheres. It is assumed that the collision dynamics in such a fluid can be approximated by instantaneous collisions. We determine the molecular size parameters from the viscosity of each pure species and show how the different effective parameters can be evaluated by extending the Vesovic-Wakeham (VW) method. We propose and implement a number of thermodynamically consistent mixing rules, taking advantage of SAFT-type analysis, in order to develop the VW method for chain molecules. The predictions of the VW-chain model have been compared in the first instance with experimental viscosity data for octane-dodecane and methane-decane mixtures, thus, illustrating that the resulting VW-chain model is capable of accurately representing the viscosity of real liquid mixtures.

References

May 1, 1970·Archives of Environmental Health·J S Chapman
Jan 6, 2006·The Journal of Chemical Physics·Rozita LaghaeiByung Chan Eu
Jul 21, 2006·The Journal of Physical Chemistry. B·Rozita LaghaeiByung Chan Eu
Aug 16, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Guillaume GalliéroFrançois Montel
Jun 3, 2008·The Journal of Chemical Physics·Astrid S de WijnJ P Martin Trusler
Jul 10, 2009·The Journal of Chemical Physics·Robert HellmannVelisa Vesovic

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Citations

Dec 5, 2012·The Journal of Chemical Physics·S Delage SantacreuC Boned
May 3, 2020·The Journal of Chemical Physics·Malyanah Binti Mohd Taib, J P Martin Trusler
Jun 13, 2020·Physical Review Letters·Faezeh Pousaneh, Astrid S de Wijn

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