Particle pressures in fluidized beds. Final report

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Description

This project studies the particle pressure, which may be thought of as the force exerted by the particulate phase of a multiphase mixture, independently of that exerted by other phases. The project is divided into two parts, one concerning gas and the other liquid fluidized beds. Previous work on gas fluidized beds had suggested that the particle pressures are generated by bubbling action. Thus, for these gas fluidized bed studies, the particle pressure is measured around single bubbles generated in 2-D fluidized beds, using special probes developed especially for this purpose. Liquid beds are immune from bubbling and the particle ... continued below

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113 p.

Creation Information

Campbell, C.S.; Rahman, K. & Jin, C. September 1, 1996.

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Description

This project studies the particle pressure, which may be thought of as the force exerted by the particulate phase of a multiphase mixture, independently of that exerted by other phases. The project is divided into two parts, one concerning gas and the other liquid fluidized beds. Previous work on gas fluidized beds had suggested that the particle pressures are generated by bubbling action. Thus, for these gas fluidized bed studies, the particle pressure is measured around single bubbles generated in 2-D fluidized beds, using special probes developed especially for this purpose. Liquid beds are immune from bubbling and the particle pressures proved too small to measure directly. However, the major interest in particle pressures in liquid beds lies in their stabilizing effect that arises from the effective elasticity (the derivative of the particle pressure with respect to the void fraction), they impart to the bed. So rather than directly measure the particle pressure, the authors inferred the values of the elasticity from measurements of instability growth in liquid beds; the inference was made by first developing a generic stability model (one with all the normally modeled coefficients left undetermined) and then working backwards to determine the unknown coefficients, including the elasticity.

Physical Description

113 p.

Notes

OSTI as DE98007339

Source

  • Other Information: PBD: Sep 1996

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  • Other: DE98007339
  • Report No.: DOE/ER/14223--T2
  • Grant Number: FG03-91ER14223
  • DOI: 10.2172/656579 | External Link
  • Office of Scientific & Technical Information Report Number: 656579
  • Archival Resource Key: ark:/67531/metadc708279

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 1996

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 6, 2015, 1:06 p.m.

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Campbell, C.S.; Rahman, K. & Jin, C. Particle pressures in fluidized beds. Final report, report, September 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc708279/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.