Abstract
An analytical expression for the shear viscosity of a fluid with particlesinteracting via pairwise interaction of hard spheres plus an attractive Yukawapotential is presented. The impact of the kinetic pressure has been includedfollowing the thermodynamic energy equation and a non-empirical equationof state based on the inverse temperature expansion of the free energyfrom the mean spherical approximation. Viscosity is computed along theliquid–vapour coexistence curves for different ranges of attractive interactions.The viscosity’s dependence on density and temperature up to the critical pointhas been investigated. The surface tension under similar conditions isalso calculated and, therefore, the relation between surface tension andviscosity along the coexistence curve is established. The validity of theArrhenius type empirical equation depicting the temperature dependence ofviscosity in the vicinity and away from the critical point is also examined.
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