Evolution of Reduced Distribution Functions. V. Binary Diffusion in a Hard-Sphere Fluid

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Abstract
The solution to a kinetic equation obtained by truncating a linearized BBGKY hierarchy at the lowest level is applied to diffusion in a two‐component hard‐sphere fluid. Laplace transforms of the force and flux expressions are numerically inverted and compared to yield the binary diffusion constant. The analysis is restricted to low densities, where the expressions predict essentially correct macroscopic behavior, although the calculated diffusion constants are uniformly about 25% of the Enskog values.