Abstract
The development of new multiple-light- scattering techniques, such as diffusing- wave spectroscopy (DWS),1 has resulted in a resurging interest in the first steps of the Brownian dynamics of particles in fluid suspensions.2,3 DWS experiments have, for example, quantitatively established the validity of the full hydrodynamic theory for the motion of an isolated spherical particle in an infinite, incompressible fluid.4 This isolated-particle theory is characterized by a hydrodynamic time scale τ0, which corresponds to the time it takes the fluid momentum or vorticity to diffuse a particle radius.
© 1993 Optical Society of America
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