Transport Properties of Anisotropic Polar Fluids:2. Dipolar Interaction

Physics – Chemical Physics

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Scientific paper

Equilibrium molecular dynamics simulation and the Green-Kubo formalism were used to calculate self-diffusion coefficient, shear viscosity, and thermal conductivity for 38 different dipolar two-center Lennard-Jones fluids along the bubble line and in the homogeneous liquid. It was systematically investigated how anisotropy, i.e. elongation, and dipole momentum influence the transport properties. The reduced elongation L* was varied from 0 to 1 and the reduced squared dipole momentum was varied depending on the elongation as follows: for spherical fluids (L*=0) from $\mu*2=0 to 20, for L*=0.2 from mu*2=0 to 16, and for L*=0.4 and above from mu*2=0 to 12. This represents the entire range in which parameters for real fluids are expected. The statistical uncertainty of the reported data varies with transport property, for self-diffusion coefficient data the error bars are typically lower than 3 %, for shear viscosity and thermal conductivity they are about 8 and 12 %, respectively.

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