NMR imaging and hydrodynamic analysis of neutrally buoyant non-Newtonian slurry flows

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The flow of solids loaded suspension in cylindrical pipes has been the object of intense experimental and theoretical investigations in recent years. These types of flows are of great interest in chemical engineering because of their important use in many industrial manufacturing processes. Such flows are for example encountered in the manufacture of solid-rocket propellants, advanced ceramics, reinforced polymer composites, in heterogenous catalytic reactors, and in the pipeline transport of liquid-solids suspensions. In most cases, the suspension microstructure and the degree of solids dispersion greatly affect the final performance of the manufactured product. For example, solid propellant pellets need to ... continued below

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16 p.

Creation Information

Bouillard, J.X. & Sinton, S.W. February 1, 1995.

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  • Bouillard, J.X. Argonne National Lab., IL (United States)
  • Sinton, S.W. Lockheed Missiles and Space Co., Palo Alto, CA (United States). Research Lab.

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Description

The flow of solids loaded suspension in cylindrical pipes has been the object of intense experimental and theoretical investigations in recent years. These types of flows are of great interest in chemical engineering because of their important use in many industrial manufacturing processes. Such flows are for example encountered in the manufacture of solid-rocket propellants, advanced ceramics, reinforced polymer composites, in heterogenous catalytic reactors, and in the pipeline transport of liquid-solids suspensions. In most cases, the suspension microstructure and the degree of solids dispersion greatly affect the final performance of the manufactured product. For example, solid propellant pellets need to be extremely-well dispersed in gel matrices for use as rocket engine solid fuels. The homogeneity of pellet dispersion is critical to allow good uniformity of the burn rate, which in turn affects the final mechanical performance of the engine. Today`s manufacturing of such fuels uses continuous flow processes rather than batch processes. Unfortunately, the hydrodynamics of such flow processes is poorly understood and is difficult to assess because it requires the simultaneous measurements of liquid/solids phase velocities and volume fractions. Due to the recent development in pulsed Fourier Transform NMR imaging, NMR imaging is now becoming a powerful technique for the non intrusive investigation of multi-phase flows. This paper reports and exposes a state-of-the-art experimental and theoretical methodology that can be used to study such flows. The hydrodynamic model developed for this study is a two-phase flow shear thinning model with standard constitutive fluid/solids interphase drag and solids compaction stresses. this model shows good agreement with experimental data and the limitations of this model are discussed.

Physical Description

16 p.

Notes

OSTI as DE95005842

Source

  • Other Information: PBD: [1995]

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  • Other: DE95005842
  • Report No.: ANL/ES/PP--79002
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/39077 | External Link
  • Office of Scientific & Technical Information Report Number: 39077
  • Archival Resource Key: ark:/67531/metadc688031

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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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Creation Date

  • February 1, 1995

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Dec. 14, 2015, 6:55 p.m.

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Bouillard, J.X. & Sinton, S.W. NMR imaging and hydrodynamic analysis of neutrally buoyant non-Newtonian slurry flows, report, February 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc688031/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.