Gas-particle flow in vertical pipes with high mass loading of particles

Sanjay Dasgupta, Roy Jackson, Sankaran Sundaresan

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

In high-velocity gas-particle flows with high mass loading of particles, the inertial and viscous effects are dominated by contributions from the particle phase. In a recent article (Dasgupta et al., AIChE J., 40 (1994) 251), we derived a mathematical model for the fully developed flow of such a suspension in a vertical pipe and showed that the non-uniform distribution of particles over the cross-section, seen experimentally in such flows, is a direct consequence of the unsteady fluctuations. In this article, we present performance diagrams predicted by this model over a wide range of operating conditions in the cocurrent upflow, countercurrent flow and cocurrent downflow regimes. Comparison of the model predictions with experimental data reveals good agreement in some cases and large departures for flows at the highest solids loadings.

Original languageEnglish (US)
Pages (from-to)6-23
Number of pages18
JournalPowder Technology
Volume96
Issue number1
DOIs
StatePublished - Apr 2 1998

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Keywords

  • Choking
  • Circulating beds
  • Flooding
  • Fluidized beds
  • Gas-solid flow
  • Riser hydrodynamics
  • Turbulence

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