Abstract
Self-diffusion in a system of particles that interact with a pseudo-hard-sphere or a Lennard-Jones potential is analyzed. Coupling with a solvent is represented by a Langevin thermostat, characterized by the damping time . The hypotheses that is proposed, where is the small concentration diffusivity and is a thermodynamic function that represents the effects of interactions as concentration is increased. Molecular dynamics simulations show that different values of the noise intensity modify , but do not have an effect on . This result is consistent with the assumption that is a thermodynamic function since the thermodynamic state is not altered by the presence of damping and noise.
- Received 14 July 2022
- Revised 25 November 2022
- Accepted 19 December 2022
DOI:https://doi.org/10.1103/PhysRevE.107.014134
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