TRANSPORT-THEORY OF DENSE, STRONGLY INHOMOGENEOUS FLUIDS

The generalized Enskog-like kinetic equation (GEKE) derived recently f or inhomogeneous fluids [L. A. Pozhar and K. E. Gubbins, J. Chem. Phys . 94, 1367 (1991)] has been solved using the thirteen-moments approxim ation method to obtain linearized Navier-Stokes equations and the asso ciated zero-frequency transport coefficients. Simplified transport coe fficient expressions have been obtained for several special cases (sim plified geometries, homogeneous fluid). For these cases it is shown th at the main contributions to the transport coefficients can be related to those for dense homogeneous fluids calculated at ''smoothed'' numb er densities and pair correlation functions. The smoothing procedure h as been derived rigorously and shown to be an intrinsic feature of the GEKE approach. These results have been established for an arbitrary d ense inhomogeneous fluid with intermolecular interactions represented by a sum of hard-core repulsive and soft attractive potentials in an a rbitrary external potential field and/or near structured solid surface s of arbitrary geometries.