Concentration fluctuations of Brownian particles in a viscoelastic solvent

摘要: We examine the dynamic light scattering time correlation for a dilute solution of Brownian particles in solvent with internal relaxation. model as non‐Newtonian, Maxwell‐type fluid, single relaxation time, τm. find that from concentration fluctuations particles, resulting their translational motion, is modified due to relaxing nature solvent. For quiescent solution, decay photon function given by exp[−Dk2t/(1+τmDk2)], where k wave vector, D diffusion coefficient and t time. The effect time‐dependent shear flow imposed on also considered. Unlike case no under simple oscillations frequency ω, exhibits even large vectors when ω/Dk2 less than unity.