Answers are grounded in this paper and cite their sources.
A simple model is used to calculate the tracer diffusion in a Lennard-Jones tracer-solvent system. The influence of the size ratio between tracer and solvent, and of their mass ratio on the tracer diffusivity is investigated. The adopted model, proposed by Tankeshwar et al. (1991) is based on the idea, put forward by Zwanzig (1983), of separating the configurational space of a fluid system into a vibrational part and a structural part. The results offer an interpretation of the molecular dynamics data showing a levelling of the self-diffusion coefficients for a sufficiently small size of the tracer. The levelling off is explicitly related to the length parameter of tracer-solvent interaction. The calculated values of the tracer diffusion coefficients for a large range of its size and mass values are quite satisfactory as judged by comparison with simulation results.
No takes yet. Share an insight, caveat, or question.
Tankeshwar et al. (1992) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: