Transport tensors in perfectly aligned low-density fluids: Self-diffusion and thermal conductivity - art. no. 061707

The modified Taxman equation for the kinetic theory of low-density fluids c omposed of rigid aspherical molecules possessing internal degrees of freedo m is generalized to obtain the transport tensors in a fluid of aligned mole cules. The theory takes care of the shape of the particles exactly but the solution has been obtained only for the case of perfectly aligned hard sphe roids within the framework of the first Sonine polynomial approximation. Th e expressions for the thermal-conductivity components have been obtained fo r the first time whereas the self-diffusion components obtained here turn o ut to be exactly the same as those derived by Kumar and Masters [Mol. Phys. 81, 491 (1994)] through the solution of the Lorentz-Boltzmann equation. Al l our expressions yield correct results in the hard-sphere limit.