Abstract
The effect of an attractive interaction potential between a spherical Brownian particle and the surrounding fluid is investigated within a hydrodynamic description. The results are used to calculate the self-diffusion coefficient of spheres interacting by a square-well potential added to a hard core. Comparison is made with the molecular dynamic calculations on this system. A Faxen theorem for the translational friction coefficient of the sphere in the presence of the interaction potential is derived. It is shown that in the case of an incompressible fluid the attractive potential has no effect on the Stokes law drag force, while first-order corrections arise as soon as compressibility is allowed.
Published Version
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