Rheological interpretation of deposits of yield stress fluids

作者: Philippe Coussot , Sébastien Proust , Christophe Ancey

DOI: 10.1016/0377-0257(96)01474-7

关键词: SlurryMechanicsCurrent (fluid)Edge (geometry)SedimentationFlow (psychology)Materials scienceRheologyFree surfaceThixotropy

摘要: Abstract Various industrial or natural slurries are coarse, concentrated suspensions with a yield stress. Relevant practical methods needed to determine the behaviour of such fluids. Here we provide simple, theoretical approach describe form deposits remaining after free surface flow stoppage as function fluid characteristics. Thixotropy, inertial effects and sedimentation neglected. It is demonstrated that depth, distance from edge, can be predicted in any direction. Further analysis shows there clear difference deposit edge between materials which grain-to-grain network interaction colloidal interaction. These results first order, practical, rheological structural interpretation current pastes, muds, slurries, fresh concrete magmas.

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