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Accounting for inertia effects to access the high-frequency microrheology of viscoelastic fluids
2014
Physical Review E
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We study the Brownian motion of microbeads immersed in water and in a viscoelastic wormlike micelles solution by optical trapping interferometry and diffusing wave spectroscopy. Through the mean-square displacement obtained from both techniques, we deduce the mechanical properties of the fluids at high frequencies by explicitly accounting for inertia effects of the particle and the surrounding fluid at short time scales. For wormlike micelle solutions, we recover the 3/4 scaling exponent for
doi:10.1103/physreve.90.060301
pmid:25615034
fatcat:zblyxvv2qvadvl5zqrj5cjzndy