Diffusion of Classical Particles in a Random Medium I.Linear Response of a Single Particle

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概要

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• A kinetic theory of diffusion of a single classical particle with a large frictionaldamping is developed in the presence of a random array of medium particleswhich behave as obstructions or traps. Starting from Langevin-type equations ofmotion, a formalism to calculate the frequency-dependent mobility jt' and selfdiffusion coefficient D' is constructed. Through a given radial distribution func-tion, the distribution of medium particles is taken into account and many bodyeffects due to interactions between diffusing and medium particles are consideredon the basis of the superposition approximation for the three-particle distributionfunction. Model calculations are carried out for hard-sphere, soft-sphere andattractive Gaussian core systems and an important role of short-range orderbetween medium particles is clarified. The frequency dependence of p' and D'shows existence of the broad distribution of relaxation times in hard-spheresystems.

• 社団法人日本物理学会の論文
• 1982-05-15

著者

• Ohtsuki Toshiya

  Department Of Applied Physics Faculty Of Engineering University Of Tokyo

• Ohtsuki Toshiya

  Department of Applied Physics,Faculty of Engineering,University of Tokyo

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