Dynamical properties of strongly interacting Brownian particles: II. Self-diffusion

✍ Scribed by Toshiya Ohtsuki

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 514 KB
• Volume: 110
• Category: Article
• ISSN: 0378-4371
• DOI: 10.1016/0378-4371(82)90072-3

✦ Synopsis

The self-diffusion process of Brownian particles is theoretically investigated for concentrated systems in the presence of strong potential interactions between particles. Starting from an N-particle diffusion equation, a formalism is developed to calculate the self-diffusion coefficienl and the velocity autocorrelation function on the basis of the superposition approximation for the three-particle distribution function of non-equilibrium states. Explicit calculations are carried oul for model systems of hard spheres with a screened Coulomb potential. Calculated time-dcpendenl self-diffusion coefficients are compared with available data of the Brownian dynamic?. Withoul introducing any phenomenological or adjustable parameters, quantitative agreement is achieved.