Transport coefficients of the Widom-Rowlinson mixture

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Abstract
In continuation of a previous paper on the static properties of the Widom-Rowlinson (WR) model mixture, we determine the thermal transport coefficients of that model by molecular-dynamics (MD) calculations and kinetic theory. The MD computations indicate that good accuracy can be obtained for the diffusion coefficient, the bulk and the shear viscosities, as well as for the thermal conductivity in a large region of densities. In contrast, the determination of the Soret coefficient poses problems and is planned to be treated in a separate publication. Comparison of the MD-generated transport coefficients with the kinetic theoretical results show remarkably good agreement over a range of densities that even includes the phase separation region. One main reason for this good agreement is certainly the accurate information for the thermodynamic properties of the WR model used in the kinetic theory expressions.