详情

原文传递 Microstructure and momentum transport in concentrated suspensions

题名：	Microstructure and momentum transport in concentrated suspensions
作者：	Brenner, H.;Graham, A.L.;Mondy, L.A.;
关键词：	01 COAL, LIGNITE, AND PEAT;32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION ;99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS ; MICROSTRUCTURE; CORRELATIONS; SUSPENSIONS; TRANSPORT; RHEOLOGY; SLURRIES; FUEL SLURRIES; MIXTURES; SLIP; SPHERES; VELOCITY; VISCOSITY; MATHEMATICAL MODELS; COAL; SOLIDS FLOW; INDUSTRY
摘要：	This paper reviews several coupled theoretical and experimental investigations of the effect of microstructure on momentum transport in concentrated suspensions. An expression to predict the apparent suspension viscosity of mixtures of rods and spheres is developed and verified with falling-ball viscometry experiments. The effects of suspension-scale slip (relative to the bulk continuum) are studied with a sensitive spinning-ball rheometer, and the results are explained with a novel theoretical method. The first noninvasive, nuclear magnetic resonance imaging measurements of the evolution of velocity and concentration profiles in pressure-driven entrance flows of initially well mixed suspensions in a circular conduit are described, as well as more complex two-dimensional flows with recirculation, e.g. flow in a journal bearing. These data in nonhomogeneous flows and complementary three-dimensional video imaging of individual tracer particles in homogeneous flows are providing much needed information on the effects of flow on particle interactions and effective theological properties at the macroscale.
总页数：	12p
报告类型：	科技报告