Microstructure and momentum transport in concentrated suspensions

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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, ... continued below

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12 p.

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Mondy, L. A.; Graham, A. L. & Brenner, H. June 1996.

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  • Mondy, L. A. Sandia National Labs., Albuquerque, NM (United States)
  • Graham, A. L. Los Alamos National Lab., NM (United States)
  • Brenner, H. Massachusetts Institute of Technology, Cambridge, MA (United States). Dept. of Chemical Engineering

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Description

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.

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12 p.

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OSTI as DE96011839

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  • 14. symposium on energy engineering sciences: mechanical sciences, Argonne, IL (United States), 15-17 May 1996

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  • Other: DE96011839
  • Report No.: SAND--96-1384C
  • Report No.: CONF-9605186--1
  • Grant Number: AC04-94AL85000;AC04-76DP00789;W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 243498
  • Archival Resource Key: ark:/67531/metadc671966

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • June 1996

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  • June 29, 2015, 9:42 p.m.

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  • April 14, 2016, 8:39 p.m.

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Mondy, L. A.; Graham, A. L. & Brenner, H. Microstructure and momentum transport in concentrated suspensions, article, June 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc671966/: accessed October 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.