Abstract
We report measurements of the steady-state shear viscosity of non-Brownian particulate suspensions in which the particles were meticulously density matched to the surrounding liquid to simulate a microgravity environment. Four distinct types of behavior were found for the viscosity of the suspensions as the shear rate and concentration were varied. Possible interpretations of the data in term of the shear-induced structure and dynamics of the suspensions are discussed. In addition, the shear rate dependence of the average particle velocity and its variance has been measured using a new technique in ultrasonic correlation spectroscopy called Dynamic Sound Scattering, demonstrating the potential of this technique for investigating the dynamics of sheared particulate suspensions.
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